[0001] The ddiisscclloossuurree hheerreeiinn rreellaatteess ttoo compounds wwhhiicchh aarree analogues of 3,4-methylenedioxymethamphetamine (MDMA), processes for their preparation, medicaments and medical methods of treatment comprising said MDMA analogues, and medical uses of said MDMA analogues.
[0002] The following discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the application.
[0004] The United States Food and Drug Administration (FDA) has approved limited research on MDMA-assisted psychotherapy for post-traumatic stress disorder (PTSD), and phase III clinical trials indicate that MDMA has clinical benefit in facilitating psychotherapeutic efficacy for PTSD.
[0005] In humans, MDMA increases the amount of serotonin in the synaptic clefts of serotonergic neurons by inhibiting its uptake into neurons and by directly releasing it from the neurons. The released serotonin binds to various serotonin receptors and activates them in excess, which is the primary mechanism through which MDMA causes intoxication. MDMA also induces significant norepinephrine and dopamine release.
and, wherein the compound of Formula I is not a compound published before the earliest priority date of the present disclosure, or wherein the compound of Formula I is not a compound hitherto not ascertained by the present inventors as being published before the earliest priority date of the present disclosure. [0035] In one embodiment, the present disclosure provides for the use of a compound of Formula II;
including stereoisomers, individual enantiomers, racemates, non-racemic mixtures, isotopologues, prodrugs and/or pharmaceutically acceptable salts thereof, wherein; one or more hydrogen atoms in the compound of Formula II may be replaced by fluorine; R
1 and R
2 are independently selected from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicyclohaloalkynyl, -C
9-14spirocyclohaloalkynyl, -C
3-9heterocycloalkyl, -C
6-12heterobicycloalkyl, -C
6-12heterospirocycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; wherein R
1 and R
2 may together form a 3, 4, 5, 6, or 7 membered, heterocycloalkyl ring, or heterocycloalkenyl ring, or a 6 membered heteroaryl ring, each of which rings may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
3 is selected from the group consisting of; CF
3, CN, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, vinyl, allyl, acetylenyl, cyclohexyl, cyclopentenyl, cyclohexenyl, propargyl, cyanomethyl, oxetanyl, thienyl, furyl, tetrahydrothienyl, tetrahydrofuryl, oxazolinyl, oxazolidinyl, isoxazolinyl, isoxazolidinyl, triazolyl, oxanyl, dioxolanyl, pyridinyl, naphthyl and phenyl; each of which may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; or
R
3 is a 4-6 membered fused ring system or a 4-6 membered spirocyclic ring system, each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems are saturated carbocyclic ring systems containing 0 heteroatoms or saturated heterocyclic ring systems containing 1 heteroatom, selected from O or S, and each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
4 and R
5 are independently selected in each instance from the group consisting of; halogen, -OR
a, -SR
a, -NR
bR
c, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; or, where two of R
4 and/or R
5 are attached to the same carbon atom, said two of R
4 and/or R
5 may together from a carbonyl group; and R
a, R
b and R
c are independently selected, in each instance, from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
1-5haloalkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5alkynyl-aryl, -C
2-5haloalkynyl-aryl,
-C
1-5alkyl-heteroaryl, -C
1-5haloalkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl and -C
2-5haloalkynyl-heteroaryl; for the manufacture of a medicament for the treatment or prevention of a disease, disorder, injury or trauma. [0036] In one embodiment, the present disclosure provides a method of treating or preventing a disease, disorder, injury or trauma, comprising the administration of an effective amount of a compound of Formula II to a subject in need thereof;
including stereoisomers, individual enantiomers, racemates, non-racemic mixtures, isotopologues, prodrugs and/or pharmaceutically acceptable salts thereof, wherein; one or more hydrogen atoms in the compound of Formula II may be replaced by fluorine; R
1 and R
2 are independently selected from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicyclohaloalkynyl, -C
9-14spirocyclohaloalkynyl, -C
3-9heterocycloalkyl, -C
6-12heterobicycloalkyl, -C
6-12heterospirocycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c,
-C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; wherein R
1 and R
2 may together form a 3, 4, 5, 6, or 7 membered, heterocycloalkyl ring, or heterocycloalkenyl ring, or a 6 membered heteroaryl ring, each of which rings may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
3 is selected from the group consisting of; CF
3, CN, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, vinyl, allyl, acetylenyl, cyclohexyl, cyclopentenyl, cyclohexenyl, propargyl, cyanomethyl, oxetanyl, thienyl, furyl, tetrahydrothienyl, tetrahydrofuryl, oxazolinyl, oxazolidinyl, isoxazolinyl, isoxazolidinyl, triazolyl, oxanyl, dioxolanyl, pyridinyl, naphthyl and phenyl; each of which may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; or R
3 is a 4-6 membered fused ring system or a 4-6 membered spirocyclic ring system, each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems are saturated carbocyclic ring systems containing 0 heteroatoms or saturated heterocyclic ring systems containing 1 heteroatom, selected from O or S, and each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
4 and R
5 are independently selected in each instance from the group consisting of; halogen, -OR
a, -SR
a, -NR
bR
c, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a,
-C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; or, where two of R
4 and/or R
5 are attached to the same carbon atom, said two of R
4 and/or R
5 may together from a carbonyl group; and R
a, R
b and R
c are independently selected, in each instance, from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
1-5haloalkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5alkynyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
1-5haloalkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl and -C
2-5haloalkynyl-heteroaryl. [0037] In one embodiment, the present disclosure provides a process for the preparation of a compound according to Formula II’;
including stereoisomers, individual enantiomers, racemates, non-racemic mixtures, isotopologues, prodrugs and/or pharmaceutically acceptable salts thereof, wherein; one or more hydrogen atoms in the compound of Formula II’ may be replaced by fluorine; R
1 and R
2 are independently selected from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicyclohaloalkynyl, -C
9-14spirocyclohaloalkynyl, -C
3-9heterocycloalkyl, -C
6-12heterobicycloalkyl,
-C
6-12heterospirocycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; wherein R
1 and R
2 may together form a 3, 4, 5, 6, or 7 membered, heterocycloalkyl ring, or heterocycloalkenyl ring, or a 6 membered heteroaryl ring, each of which rings may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
3 is selected from the group consisting of; CF
3, CN, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, vinyl, allyl, acetylenyl, cyclohexyl, cyclopentenyl, cyclohexenyl, propargyl, cyanomethyl, oxetanyl, thienyl, furyl, tetrahydrothienyl, tetrahydrofuryl, oxazolinyl, oxazolidinyl, isoxazolinyl, isoxazolidinyl, triazolyl, oxanyl, dioxolanyl, pyridinyl, naphthyl and phenyl; each of which may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; or R
3 is a 4-6 membered fused ring system or a 4-6 membered spirocyclic ring system, each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems are saturated carbocyclic ring systems containing 0 heteroatoms or saturated heterocyclic ring systems containing 1 heteroatom, selected from O or S, and each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
4 and R
5 are independently selected in each instance from the group consisting of; halogen, -OR
a, -SR
a, -NR
bR
c, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl,
-C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; or, where two of R
4 and/or R
5 are attached to the same carbon atom, said two of R
4 and/or R
5 may together from a carbonyl group; and R
a, R
b and R
c are independently selected, in each instance, from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
1-5haloalkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5alkynyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
1-5haloalkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl and -C
2-5haloalkynyl-heteroaryl; wherein the process comprises reacting a compound according to Formula III;
wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl; with a compound according to Formula IVa, or Formula IVb, or Formula IVc;
Formula IVa; Formula IVb; Formula IVc; wherein R
3 is as defined for the compound of Formula II’, and wherein, for the compound of Formula IVb, each R
3 may be the same or different, and wherein R’ is selected from the group consisting of; methyl, ethyl, -C
3-9alkyl, aryl and haloaryl; under a first set of reaction conditions, to produce a compound of Formula V;
Formula V followed by subjecting the compound of Formula V to a second set of reaction conditions to produce a ketone intermediate of Formula VI;
Formula VI and subsequent reductive amination of the compound of Formula VI with a compound of Formula VII;
Formula VII wherein R
1 and R
2 are as defined for the compound of Formula II’; under a third set of reaction conditions, to produce the compound of Formula II’.
BRIEF DESCRIPTION OF THE DRAWINGS [0038] Further features of the present invention are more fully described in the following description of several non-limiting embodiments thereof. This description is included solely for the purposes of exemplifying the present invention. It should not be understood as a restriction on the broad summary, disclosure or description of the invention as set out above. The description will be made with reference to the accompanying drawings in which: DEFINITIONS [0039] Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. [0040] As used herein, the term “stereoisomer”, and grammatical variations thereof such as “stereoisomers”, “stereoisomerism”, “stereoisomeric”, et cetera, refers to spatial isomerism in the molecular entity to which it is contextually applied. More specifically, the term is to be understood to include molecules having the same molecular formula and sequence of bonded atoms (constitution) but differing in the three-dimensional orientations of their atoms in space. Thus stereoisomers are to be understood as including optical isomers or enantiomers, diastereoisomers, cis-trans or E-Z isomers, conformers, anomers, atropisomers, configurational stereoisomers and epimers of the molecular entity to which the term is applied. By definition, molecules that are stereoisomers of each other represent the same structural isomer, and the same constitutional isomer. [0041] All chiral, diastereomeric, racemic mixtures, non-racemic mixtures and geometric isomeric forms of a structure are intended, unless specific stereochemistry or isomeric form is specifically indicated. All processes used to prepare compounds of the present invention and intermediates made therein are considered to be part of the present invention. All tautomers of shown or described compounds are also considered to be part of the present invention. [0042] As used herein, the term “isotopologue”, and grammatical variations thereof such as “isotopologue”, et cetera, is to be understood to mean molecules that differ only in their isotopic composition. That is to say, the term refers to molecules having the same chemical formula and bonding arrangement of atoms, but at least one atom has a different number of neutrons than the parent. [0043] As used herein, the term “prodrug”, and grammatical variations thereof such as “prodrugs”, et cetera, is to be understood to mean a compound that, after administration, is in
vivo hydrolyzed or metabolized (i.e., converted within the body) into a pharmacologically active drug. Thus, “prodrug” refers to a compound that is metabolized, for example, hydrolyzed or oxidized, in the host to form a compound of the Formula (I) or Formula (II). Typical examples of prodrugs include compounds that have biologically labile protecting groups on a functional moiety of the active compound. Prodrugs may include, for example, compounds that can be oxidized, reduced, aminated, deaminated, hydroxylated, dehydroxylated, hydrolyzed, dehydrolyzed, alkylated, dealkylated, acylated, deacylated, phosphorylated, or dephosphorylated to produce the active compound. The skilled addressee will be aware that compounds containing, for example, hydroxyl, carboxylic acid or amine substituents may be derivatized as esters or amides and that such derivatives will be susceptible to in vivo hydrolysis and/or metabolism to yield the parent, underivatized compound. Such derivatives are to be understood as falling within the scope of the term “prodrugs”. Prodrugs can be readily prepared from the compounds of Formula (I) or Formula (II) using methods known in the art. See, for example, Notari, R. E., "Theory and Practice of Prodrug Kinetics," Methods in Enzymology, 112:309323 (1985); Bodor, N., "Novel Approaches in Prodrug Design," Drugs of the Future, 6(3): 165182 (1981); and Bundgaard, H., "Design of Prodrugs: Bioreversible-Derivatives for Various Functional Groups and Chemical Entities," in Design of Prodrugs (H. Bundgaard, ed.), Elsevier, N.Y. (1985); Burger's Medicinal Chemistry and Drug Chemistry, Fifth Ed., Vol. 1, pp. 172- 178, 949-982 (1995). [0044] As used herein, the term “pharmaceutically acceptable”, will be understood to mean a material that is not biologically or otherwise undesirable, i.e., the material can be administered to an individual along with the compounds or compositions of this invention, without causing substantial deleterious biological effects or interacting in a deleterious manner with any of the other components of the composition in which it is contained. The material would naturally be selected to minimize any degradation of the active ingredient and to minimize any adverse side effects in the subject, as would be well known to one of skill in the art. [0045] Compounds of the Invention may exist in free or salt form, e.g., as acid addition salts. In this specification unless otherwise indicated language such as “Compounds of the Invention” is to be understood as embracing the compounds in any form, for example free or acid addition salt form, or where the compounds contain acidic substituents, in base addition salt form. The Compounds of the Invention are intended for use as pharmaceuticals or vetinary medicines, therefore pharmaceutically acceptable salts are preferred. Salts which are unsuitable for pharmaceutical uses may be useful, for example, for the isolation or purification of free Compounds of the Invention or their salts or pharmaceutically acceptable salts, are therefore also included. “Pharmaceutically acceptable salts” include, without limitation, sodium,
magnesium, calcium, lithium, potassium, chloride, bromide, iodide, hydrochloride, hydrobromide, sulfate, acetate, tartrate, malate, mesylate and tosylate salts, for example. [0046] As used herein, the term “alkyl”, by itself or as part of another substituent, will be understood to mean unless otherwise stated, a straight or branched chain hydrocarbon, and where designated, having the number of carbon atoms designated (i.e., “-C
1-10alkyl” means an alkyl having between one to ten carbon atoms). By way of illustration, but without limitation, the term "-C
1-8alkyl" refers to a straight chain or branched hydrocarbon moiety having from 1, 2, 3, 4, 5, 6, 7, or 8 carbon atoms. "-C
1-6alkyl" refers to a straight chain or branched hydrocarbon moiety having from 1, 2, 3, 4, 5, or 6 carbon atoms. "-C
1-4alkyl" refers to a straight chain or branched hydrocarbon moiety having from 1, 2, 3, or 4 carbon atoms, including methyl, ethyl, n- propyl, n-propyl, n-butyl, iso-butyl, sec-butyl, and tert-butyl. The term “-C
1-9haloalkyl” refers to a straight chain or branched hydrocarbon moiety having from 1, 2, 3, 4, 5, 6, 7, 8 or 9 carbon atoms, wherein one or more of said carbon atoms are substituted with one or more halogen atoms selected from F, Cl, Br or I. [0047] As used herein, the term “parent molecular structure”, “parent molecule”, and grammatical variations thereof, when used in the context of defining variable substituents of Markush Formulae, will be understood to refer to the core structure or non-variable portion of the Markush Formula to which it is being applied. For example, Formula I as defined herein has the variables R
1, R
2 and R
3 attached to the parent molecular structure:
Formula I [0048] As used herein, the term "alkenyl" employed alone or in combination with other terms means, unless otherwise stated, a straight chain or branched hydrocarbon group containing at least one double bond, and where designated, having the number of carbon atoms designated. For example, from two to ten carbon atoms (i.e., -C
2-10alkenyl). Whenever it appears herein, a numerical range such as "2 to 10" or “2-10”, refers to each integer in the given range; e.g., "2 to 10 carbon atoms" means that the -C
2-10alkenyl group can consist of 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms. The alkenyl group is attached to the parent molecular structure by a single bond, for example, ethenyl (i.e., vinyl), propen-1-yl (i.e., allyl), buten-1-yl, penten-1-yl, penta-1,4- dienyl, and the like. The one or more carbon-carbon double bonds can be internal (such as in 2- butenyl) or terminal (such as in 1-butenyl). Examples of -C
2-4alkenyl groups include ethenyl (C
2), 1-propenyl (C
3), 2-propenyl (C
3), 1-butenyl (C
4), 2-butenyl (C
4), 2-methylprop-2-enyl (C
4),
butadienyl (C
4) and the like. Examples of -C
2-6alkenyl groups include the aforementioned -C
2- 4alkenyl groups as well as pentenyl (C
5), pentadienyl (C
5), hexenyl (C
6), 2,3-dimethyl-2-butenyl (C
6) and the like. Additional examples of alkenyl include heptenyl (C
7), octenyl (C
8), octatrienyl (C
8) and the like. Further examples include vinyl, propenyl (or allyl), crotyl, isopentenyl, butadienyl, 1,3-pentadienyl, 1,4-pentadienyl, and the higher homologs and isomers. An example of a functional group representing an alkene is -CH
2-CH=CH
2. The term “-C
2-9haloalkenyl” refers to a straight chain or branched hydrocarbon moiety containing at least one double bond, having 2, 3, 4, 5, 6, 7, 8 or 9 carbon atoms, wherein one or more of said carbon atoms are substituted with one or more halogen atoms selected from F, Cl, Br or I. [0049] As used herein, the term "alkynyl" employed alone or in combination with other terms will be understood to mean, unless otherwise stated, a straight chain or branched chain hydrocarbon group containing at least one triple bond, having the number of carbon atoms specified (i.e., -C
2-10alkynyl). Whenever it appears herein, a numerical range such as "2 to 10" refers to each integer in the given range; e.g., "-C
2-10alkynyl" means that the alkynyl group can consist of 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms. In certain embodiments, an alkynyl comprises two to nine carbon atoms. The alkynyl is attached to the parent molecular structure by a single bond, for example, ethynyl, propynyl, butynyl, pentynyl, 3-methyl-4-pentenyl, hexynyl, and the like. Non-limiting examples include ethynyl and propynyl, and the higher homologs and isomers. The term "propargylic" and grammatical variations such as “propargyl” refers to a group exemplified by -CH
2-C≡CH. The term “-C
2-9haloalkynyl” refers to a straight chain or branched hydrocarbon moiety containing at least one triple bond, having from 2, 3, 4, 5, 6, 7, 8 or 9 carbon atoms, wherein one or more of said carbon atoms are substituted with one or more halogen atoms selected from F, Cl, Br or I. [0050] As used herein, the term "halo", employed alone or in combination with other terms will be understood to mean, unless otherwise stated, one or more halogen atom substituents independently selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br) and iodine (I). The term “halo” is understood to be used interchangeably with the term “halogen”. [0051] As used herein, the term "cyclo" employed in combination with other terms will be understood to mean, unless otherwise stated, a cyclic moiety. [0052] As used herein, the term "aromatic" refers to a carbocycle or heterocycle with one or more polyunsaturated rings and having aromatic character, for example, under classical circumstances, having (4n+2) delocalized π (pi) electrons, where n is an integer. This skilled addressee will be aware that there are exceptions to the general (4n+2) delocalized π (pi) electron rule that still possess aromatic character and that will therefore also fall within the definition of “aromatic”.
[0053] As used herein, the term "aryl" employed alone or in combination with other terms means, unless otherwise stated, a carbocyclic aromatic system containing one or more rings (typically one, two or three rings) wherein such rings may be fused, such as naphthalene. In a multi-ring group, only one ring is required to be aromatic, so groups such as indanyl are encompassed by the aryl definition, provided the aromatic ring of such groups is attached directly to the parent molecule. The ring or ring system can have 6 to 14 ring atoms (e.g., C
6- 14aromatic or C
6-14aryl). Whenever it appears herein, a numerical range such as "6 to 14 aryl" refers to each integer in the given range; e.g., "C
6-14aryl" means that the aryl group can consist of 6, 7, 8, 9, 10, 11, 12, 13, or 14 ring atoms. Non-limiting examples of aryl groups include phenyl, phenalenyl, naphthalenyl, tetrahydronaphthyl, phenanthrenyl, anthracenyl, fluorenyl, indolyl, indanyl, and the like. [0054] As used herein, the term “hetero” employed in combination with other terms will be understood to mean, unless otherwise stated, replacement of one or more carbon atoms in the other term to which it is applied, with a heteroatom independently selected in each instance from the group consisting of oxygen (O), nitrogen (N), sulfur (S), selenium (Se), silicon (Si) or phosphorus (P). [0055] The term "heteroaryl" as used herein includes 5-, 6- and 7-membered monocyclic or poly cyclic (e.g., bicyclic or tricyclic) aromatic ring systems having ring carbon atoms and 1, 2, 3, or 4 ring heteroatoms provided in the aromatic ring system, wherein each heteroatom is independently selected from nitrogen, oxygen, phosphorous and sulfur. For example, a heteroaryl can have one or two 5-, 6- or 7-membered rings and 1 to 4 heteroatoms selected from N, O, and S. Heteroaryl bicyclic ring systems can include 1, 2, 3, or 4 heteroatoms in one or both rings. Exemplary heteroaryls include, but are not limited to, pyrrole, furan, thiophene, imidazole, oxazole, oxadiazole, thiazole, triazole, pyrazole, pyridine, pyrazine, pyridazine, azepine, oxepine, oxazine, triazine, pyrimidine, indole, and benzoimidazole, and the like. Those aryl groups having heteroatoms in the ring structure may also be referred to as "aryl heterocycles" or "heteroaromatics." [0056] As used herein, the term "cycloalkyl" employed alone or in combination with other terms will be understood to mean, unless otherwise stated, a cycloalkyl moiety. Where a number of carbon atoms is specified, the cycloalkyl moiety will contain the specified number of carbon atoms. Where a range in the number of carbon atoms is specified, the cycloalkyl moiety will contain a number of carbon atoms selected from integer within the specified range. For example, “-C
3-9cycloalkyl” will be understood to mean a saturated carbocyclic ring moiety comprising 3, 4, 5, 6, 7, 8 or 9 carbon atoms, and will therefore be understood to include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and cyclononyl moieties. “-C
6-12bicycloalkyl” will be understood to mean a saturated carbocyclic ring system comprising
two fused carbocyclic rings and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms. “-C
6-12spirocycloalkyl” will be understood to mean a saturated carbocyclic ring system comprising two carbocyclic rings wherein only one carbon atom is common to both rings, and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms. “-C
3-9cyclohaloalkyl” will be understood to mean a saturated carbocyclic ring moiety comprising 3, 4, 5, 6, 7, 8 or 9 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. “-C
6-12bicyclohaloalkyl” will be understood to mean a saturated carbocyclic ring system comprising two fused carbocyclic rings and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. “-C
6-12spirocyclohaloalkyl” will be understood to mean a saturated carbocyclic ring system comprising two carbocyclic rings wherein only one carbon atom is common to both rings, and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0057] As used herein, the term "cycloalkenyl" employed alone or in combination with other terms will be understood to mean, unless otherwise stated, a cycloalkyl moiety containing one or more double bonds. Where a number of carbon atoms is specified, the cycloalkenyl moiety will contain the specified number of carbon atoms. Where a range in the number of carbon atoms is specified, the cycloalkenyl moiety will contain a number of carbon atoms selected from integer within the specified range. For example, “-C
3-9cycloalkenyl” will be understood to mean a carbocyclic ring moiety having at least one double bond, and comprising 3, 4, 5, 6, 7, 8 or 9 carbon atoms, and will therefore be understood to include cyclopropenyl, cyclobutenyl, cyclobutadienyl, cyclopentenyl, cyclopentadienyl cyclohexenyl, cyclohexadienyl, cycloheptenyl, cycloheptadienyl, cycloheptatrienyl, cyclooctenyl, cyclooctadienyl, cyclooctatrienyl, cyclooctatetraenyl, cyclononenyl, cyclononadienyl, cyclononatrienyl, and cyclononatetraenyl moieties. “-C
6-12bicycloalkenyl” will be understood to mean a carbocyclic ring system having at least one double bond, comprising two fused carbocyclic rings and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms. “-C
6-12spirocycloalkenyl” will be understood to mean a carbocyclic ring system comprising two carbocyclic rings and at least one double bond, wherein only one carbon atom is common to both rings, and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms. “-C
3-9cyclohaloalkenyl” will be understood to mean a carbocyclic ring moiety having at least one double bond, comprising 3, 4, 5, 6, 7, 8 or 9 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. “-C
6-12bicyclohaloalkenyl” will be understood to mean a carbocyclic ring system having at least one double bond, comprising two fused carbocyclic rings and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo
groups independently selected in each instance from F, Cl, Br and I. “-C
6-12spirocyclohaloalkenyl” will be understood to mean a carbocyclic ring system having at least one double bond, comprising two carbocyclic rings wherein only one carbon atom is common to both rings, and having 6, 7, 8, 9, 10, 11 or 12 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0058] As used herein, the term "cycloalkynyl" employed alone or in combination with other terms will be understood to mean, unless otherwise stated, a cycloalkyl moiety containing one or more triple bonds. Where a number of carbon atoms is specified, the cycloalkynyl moiety will contain the specified number of carbon atoms. Where a range in the number of carbon atoms is specified, the cycloalkynyl moiety will contain a number of carbon atoms selected from integer within the specified range. For example, “-C
8-12cycloalkynyl” will be understood to mean a carbocyclic ring moiety having at least one triple bond, and comprising 8, 9, 10, 11, or 12 carbon atoms, and will therefore be understood to include cyclooctynyl, cyclooctadiynyl, cyclononynyl, cyclononadiynyl, cyclononatriynyl, cyclodecynyl, cyclodecadiynyl, cyclodecatriynyl, cycloundecynyl, cycloundecadiynyl, cycloundecatriynyl, cyclododecynyl, cyclododecadiynyl, cyclododecatriynyl, and cyclododecatetraynyl, moieties. “-C
9-14bicycloalkynyl” will be understood to mean a carbocyclic ring system having at least one triple bond, comprising two fused carbocyclic rings and having 9, 10, 11, 12, 13 or 14 carbon atoms. “-C
9-14spirocycloalkynyl” will be understood to mean a carbocyclic ring system comprising two carbocyclic rings and at least one triple bond, wherein only one carbon atom is common to both rings, and having 9, 10, 11, 12, 13 or 14 carbon atoms. “-C
8-12cyclohaloalkenyl” will be understood to mean a carbocyclic ring moiety having at least one triple bond, comprising 8, 9, 10, 11 or 12 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. “-C
9-14bicyclohaloalkenyl” will be understood to mean a carbocyclic ring system having at least one triple bond, comprising two fused carbocyclic rings and having 9, 10, 11, 12, 13 or 14 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. “-C
9-14spirocyclohaloalkenyl” will be understood to mean a carbocyclic ring system having at least one triple bond, comprising two carbocyclic rings wherein only one carbon atom is common to both rings, and having 9, 10, 11, 12, 13 or 14 carbon atoms wherein one or more of the carbon atoms is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0059] The term “-C
1-5alkyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain fully saturated linker wherein said linker comprises 1, 2, 3, 4 or 5 carbon atoms.
[0060] The term “-C
2-5alkenyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one double bond, and comprises 2, 3, 4 or 5 carbon atoms. [0061] The term “-C
2-5alkynyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one triple bond, and comprises 2, 3, 4 or 5 carbon atoms. [0062] The term “-C
1-5alkyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain fully saturated linker wherein said linker comprises 1, 2, 3, 4 or 5 carbon atoms. [0063] The term “-C
2-5alkenyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one double bond, and comprises 2, 3, 4 or 5 carbon atoms. [0064] The term “-C
2-5alkynyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one triple bond, and comprises 2, 3, 4 or 5 carbon atoms. [0065] The term “-C
1-5haloalkyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain fully saturated linker wherein said linker comprises 1, 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0066] The term “-C
2-5haloalkenyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one double bond, and comprises 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0067] The term “-C
2-5haloalkynyl-aryl” will be understood to mean a substituent comprising an aryl (aromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one triple bond, and comprises 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I.
[0068] The term “-C
1-5haloalkyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain fully saturated linker wherein said linker comprises 1, 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0069] The term “-C
2-5haloalkenyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one double bond, and comprises 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0070] The term “-C
2-5haloalkynyl-heteroaryl” will be understood to mean a substituent comprising an heteroaryl (heteroaromatic) group connected to the parent molecule via a branched chain or straight chain linker wherein said linker has at least one triple bond, and comprises 2, 3, 4 or 5 carbon atoms, wherein one or more of the carbon atoms of the linker is substituted with one or more halo groups independently selected in each instance from F, Cl, Br and I. [0071] It will be understood that the description of compounds herein is limited by principles of chemical bonding and valency known to those skilled in the art. Accordingly, where a group may be substituted by one or more of a number of substituents, such substitutions are selected so as to comply with principles of chemical bonding with regard to valencies, and to give compounds which are not inherently unstable. [0072] The words “treatment” and “treating” are to be understood accordingly as embracing prophylaxis and treatment or amelioration of symptoms of diseases, disorders, medical conditions or ailments as well as treatment of the cause of the diseases, disorders, medical conditions or ailments. [0073] The term “subject” in the context of methods of treatment may include a human or non- human subject. [0074] As used herein, the term "an effective amount" refers to an amount sufficient to effect beneficial or desired results. An effective amount can be administered in one or more administrations, applications, or dosages. Determination of an effective amount for a given administration is well within the ordinary skill in the pharmaceutical arts.
[0075] As used herein, the term "diluent" refers to a pharmacologically inert substance that is nevertheless suitable for human consumption, which serves as an excipient in the dosage form. A diluent serves to dilute the active pharmaceutical ingredient in the dosage form, such that tablets of a typical size can be prepared incorporating a wide range of actual doses of the active pharmaceutical ingredient. A diluent need not be included if the content per dosage form of one or both pharmaceutical ingredients is desired to be maximized for a particular dosage unit size. A diluent can comprise a microcrystalline cellulose, for example, AVICEL. Lactose and isomalt are other common diluents. AVICEL, a form of microcrystalline cellulose, is a commercially available product that is formed of acid-treated cellulose, which treatment tends to dissolve more amorphous regions of the cellulose and to leave more crystalline regions of the cellulose. Microcrystalline cellulose can be a diluent in the inventive dosage form. [0076] Other diluents well-known to those skilled in the art include monobasic calcium phosphate, dibasic calcium phosphate and tribasic calcium phosphate. Almost completely water-insoluble, calcium phosphates are particularly well-known pharmacologically inert diluents or fillers that are compatible with a wide range of active pharmaceutical ingredients. By the term "calcium phosphate" is meant herein calcium phosphate in any of its forms, including, for example, monobasic calcium phosphate (Ca(H
2PO
4)
2), dibasic calcium phosphate (CaHPO
4), and tricalcium phosphate (Ca
2(PO
4)S), including any orthophosphates, pyrophosphates, or superphosphates, or other polymeric phosphates wherein the counterion includes calcium. [0077] As used herein, the term "excipient" refers to an ingredient of the dosage form that is not medicinally active, but serves to dilute the active pharmaceutical ingredient, assist in dispersion of the tablet in the patient's stomach, bind the tablet together, and serve other functions like stabilizing the active pharmaceutical ingredient against decomposition. [0078] As used herein, the term “pharmaceutically acceptable carrier,” and grammatical variations thereof, refers to adjuvants, binders, etc. known to the person skilled in the art that are suitable for administration to an individual (e.g., a mammal or non-mammal). The pharmaceutically acceptable carrier(s) and any additional components, as described herein, should be compatible for use in the intended route of administration (e.g., oral, parenteral) for a particular dosage form. Pharmaceutically acceptable carriers or excipients have preferably met the required standards of toxicological and manufacturing testing and/or are included on the Inactive Ingredient Guide prepared by the U.S. Food and Drug Administration (FDA). [0079] Other definitions for selected terms used herein may be found within the detailed description of the invention and apply throughout. Unless otherwise defined, all other scientific
and technical terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which the invention belongs. DETAILED DESCRIPTION [0080] The present invention seeks to address the need to provide alternative analogues of MDMA that possess the same methylenedioxy-phenylethylamine backbone as MDMA, but that vary the substituents on the nitrogen and/or at the α-position of the ethylamine, and thereby provide compounds possessing similar structural and biological properties to MDMA and other phenethylamine or tryptamine drugs and neurotransmitter compounds, including their significant therapeutic potential in the treatment of a vast number of medical conditions, whilst avoiding, circumventing, overcoming or obviating one or more of the problems associated with prescribing MDMA and other phenethylamine or tryptamine based compounds as a therapeutic treatment. [0081] In a first aspect, the present disclosure provides compounds according to Formula I;

Formula I including stereoisomers, individual enantiomers, racemates, non-racemic mixtures, isotopologues, prodrugs and/or pharmaceutically acceptable salts thereof, wherein; one or more hydrogen atoms in the compound of Formula I may be replaced by fluorine; R
1 and R
2 are independently selected from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicyclohaloalkynyl, -C
9-14spirocyclohaloalkynyl, -C
3-9heterocycloalkyl, -C
6-12heterobicycloalkyl, -C
6-12heterospirocycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a,
-C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; wherein R
1 and R
2 may together form a 3, 4, 5, 6, or 7 membered, heterocycloalkyl ring, or heterocycloalkenyl ring, or a 6 membered heteroaryl ring, each of which rings may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
3 is selected from the group consisting of; CF
3, CN, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, vinyl, allyl, acetylenyl, cyclohexyl, cyclopentenyl, cyclohexenyl, propargyl, cyanomethyl, oxetanyl, thienyl, furyl, tetrahydrothienyl, tetrahydrofuryl, oxazolinyl, oxazolidinyl, isoxazolinyl, isoxazolidinyl, triazolyl, oxanyl, dioxolanyl, pyridinyl, naphthyl and phenyl; each of which may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; or R
3 is a 4-6 membered fused ring system or a 4-6 membered spirocyclic ring system, each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems are saturated carbocyclic ring systems containing 0 heteroatoms or saturated heterocyclic ring systems containing 1 heteroatom, selected from O or S, and each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
4 and R
5 are independently selected in each instance from the group consisting of; halogen, -OR
a, -SR
a, -NR
bR
c, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl,
-C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; or, where two of R
4 and/or R
5 are attached to the same carbon atom, said two of R
4 and/or R
5 may together from a carbonyl group; and R
a, R
b and R
c are independently selected, in each instance, from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
1-5haloalkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5alkynyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
1-5haloalkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl and -C
2-5haloalkynyl-heteroaryl; wherein the compound of Formula I is not a compound selected from the group comprising;
[0092] In a fourth aspect, the present disclosure provides a process for the preparation of a compound according to Formula II’;
Formula II’ including stereoisomers, individual enantiomers, racemates, non-racemic mixtures, isotopologues, prodrugs and/or pharmaceutically acceptable salts thereof, wherein; one or more hydrogen atoms in the compound of Formula II’ may be replaced by fluorine; R
1 and R
2 are independently selected from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicyclohaloalkynyl, -C
9-14spirocyclohaloalkynyl, -C
3-9heterocycloalkyl, -C
6-12heterobicycloalkyl, -C
6-12heterospirocycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl,
-C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; wherein R
1 and R
2 may together form a 3, 4, 5, 6, or 7 membered, heterocycloalkyl ring, or heterocycloalkenyl ring, or a 6 membered heteroaryl ring, each of which rings may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
3 is selected from the group consisting of; CF
3, CN, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, vinyl, allyl, acetylenyl, cyclohexyl, cyclopentenyl, cyclohexenyl, propargyl, cyanomethyl, oxetanyl, thienyl, furyl, tetrahydrothienyl, tetrahydrofuryl, oxazolinyl, oxazolidinyl, isoxazolinyl, isoxazolidinyl, triazolyl, oxanyl, dioxolanyl, pyridinyl, naphthyl and phenyl; each of which may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; or R
3 is a 4-6 membered fused ring system or a 4-6 membered spirocyclic ring system, each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems are saturated carbocyclic ring systems containing 0 heteroatoms or saturated heterocyclic ring systems containing 1 heteroatom, selected from O or S, and each of which 4-6 membered fused ring systems or 4-6 membered spirocyclic ring systems may be unsubstituted, or substituted by one or more groups selected from R
4 or R
5; R
4 and R
5 are independently selected in each instance from the group consisting of; halogen, -OR
a, -SR
a, -NR
bR
c, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, -C
6-12bicycloalkyl, -C
6-12spirocycloalkyl, -C
3-9cyclohaloalkyl, -C
6-12bicyclohaloalkyl, -C
6-12spirocyclohaloalkyl, -C
3-9cycloalkenyl, -C
6-12bicycloalkenyl, -C
6-12spirocycloalkenyl, -C
3-9cyclohaloalkenyl, -C
6-12bicyclohaloalkenyl, -C
6-12spirocyclohaloalkenyl, -C
8-12cycloalkynyl, -C
9-14bicycloalkynyl, -C
9-14spirocycloalkynyl, -C
8-12cyclohaloalkynyl, -C
9-14bicycloalkynyl,
-C
9-14spirocycloalkynyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5alkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl, -C
1-5haloalkyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5haloalkyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5haloalkynyl-heteroaryl, -C(=O)R
a, -C
1-8alkyl-C(=O)R
a, -C
2-8alkenyl-C(=O)R
a, -C
2-8alkynyl-C(=O)R
a, -C
1-8haloalkyl-C(=O)R
a, -C
2-8haloalkenyl-C(=O)R
a, -C
2-8haloalkynyl-C(=O)R
a, -CO
2R
a, -C
1-8alkyl-CO
2R
a, -C
2-8alkenyl-CO
2R
a, -C
2-8alkynyl-CO
2R
a, -C
1-8haloalkyl-CO
2R
a, -C
2-8haloalkenyl-CO
2R
a, -C
2-8haloalkynyl-CO
2R
a, -SO
2R
a, -C
1-8alkyl-SO
2R
a, -C
2-8alkenyl-SO
2R
a, -C
2-8alkynyl-SO
2R
a, -C
1-8haloalkyl-SO
2R
a, -C
2-8haloalkenyl-SO
2R
a, -C
2-8haloalkynyl-SO
2R
a, -C(=O)NR
bR
c, -C
1-8alkyl-C(=O)NR
bR
c, -C
2-8alkynyl-C(=O)NR
bR
c, -C
2-8alkenyl-C(=O)NR
bR
c, -C
1-8haloalkyl-C(=O)NR
bR
c, -C
2-8haloalkynyl-C(=O)NR
bR
c, -C
2-8haloalkenyl-C(=O)NR
bR
c, -CN, -C
1-8alkyl-CN, -C
2-8alkenyl-CN, -C
2-8alkynyl-CN, -C
1-8haloalkyl-CN, -C
2-8haloalkenyl-CN, -C
2-8haloalkynyl-CN, -CH
2-O-R
a, -C
2-9alkyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9alkenyl-O-R
a, -C
2-9haloalkyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -C
2-9haloalkenyl-O-R
a, -CH
2-S-R
a, -C
2-9alkyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9alkenyl-S-R
a, -C
2-9haloalkyl-S-R
a, -C
2-9haloalkenyl-S-R
a, and -C
2-9haloalkenyl-S-R
a; or, where two of R
4 and/or R
5 are attached to the same carbon atom, said two of R
4 and/or R
5 may together from a carbonyl group; and R
a, R
b and R
c are independently selected, in each instance, from the group consisting of; H, methyl, ethyl, -C
3-9alkyl, -C
1-9haloalkyl, -C
2-9alkenyl, -C
2-9haloalkenyl, -C
2-9alkynyl, -C
2-9haloalkynyl, -C
3-9cycloalkyl, aryl, heteroaryl, -C
1-5alkyl-aryl, -C
1-5haloalkyl-aryl, -C
2-5alkenyl-aryl, -C
2-5haloalkenyl-aryl, -C
2-5alkynyl-aryl, -C
2-5haloalkynyl-aryl, -C
1-5alkyl-heteroaryl, -C
1-5haloalkyl-heteroaryl, -C
2-5alkenyl-heteroaryl, -C
2-5haloalkenyl-heteroaryl, -C
2-5alkynyl-heteroaryl and -C
2-5haloalkynyl-heteroaryl; wherein the process comprises reacting a compound according to Formula III;
Formula III wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl; with a compound according to Formula IVa, or Formula IVb, or Formula IVc;
Formula IVa; Formula IVb; Formula IVc; wherein R
3 is as defined for the compound of Formula II’, and wherein, for the compound of Formula IVb, each R
3 may be the same or different, and wherein R’ is selected from the group consisting of; methyl, ethyl, -C
3-9alkyl, aryl and haloaryl; under a first set of reaction conditions, to produce a compound of Formula V;
Formula V followed by subjecting the compound of Formula V to a second set of reaction conditions to produce a ketone intermediate of Formula VI;
Formula VI and subsequent reductive amination of the compound of Formula VI with a compound of Formula VII;
Formula VII wherein R
1 and R
2 are as defined for the compound of Formula II’; under a third set of reaction conditions, to produce the compound of Formula II’. [0093] In some aspects, the first set of reaction conditions comprises reacting 1 equivalent of a compound of Formula III with an excess of a compound of Formula IVa or Formula IVb or Formula IVc, in an organic solvent, in the presence of an excess of a base.
[0094] In some aspects, the organic solvent in the first set of reaction conditions is a polar aprotic solvent, preferably tetrahydrofuran (THF), and the base in the first set of reaction conditions is a strong base, for example sodium hexamethyldisilazide (NaHMDS) or potassium hexamethyldisilazide (KHMDS), most preferably a lithium base, for example lithium hexamethyldisilazide (LiHMDS). [0095] In some aspects, the second set of reaction conditions comprises heating a solution of the compound of Formula V in a mixture of DMSO and water, in the presence of a source of chloride ions, preferably KCl or LiCl or NaCl, most preferably NaCl. The person skilled in the art will be aware that alternative Krapcho decarboxylation conditions to those preferred conditions described above will be equally applicable and effective in the second set of reaction conditions. [0096] In some aspects, the third set of reaction conditions comprises reductive amination of the compound of Formula VI with a compound of Formula VII, preferably in the presence of acetic acid and sodium cyanoborohydride in a mixture of anhydrous THF and anhydrous methanol. The person skilled in the art will be aware that alternative reductive amination conditions to those preferred conditions described above will be equally applicable and effective in the third set of reaction conditions. For example, acetic acid and sodium cyanoborohydride in in ethanol alone (or in combination with anhydrous THF) would be equally effective in the third set of reaction conditions. [0097] In a fifth aspect, the present disclosure provides a compound of Formula II’, when made via the process of the fourth aspect. [0098] In a sixth aspect, the present disclosure provides a compound according to Formula VI;

Formula VI wherein R
3 is as defined for the compound of Formula II’, when the compound of Formula VI is made via the process of the fourth aspect. EXAMPLES [0099] Synthesis General procedure for obtaining hydrochloride salts of free base compounds of the invention
[00100] The free base is dissolved in MeOH (1 mL) and 32% HCl (2 eq.) is added dropwise. The solution is evaporated to dryness under a stream of N
2 and the residue is recrystallised using a suitable solvent (for example, 2-propanol or 2-propanol/Et
2O, or toluene, or toluene/cyclohexane) to give the desired hydrochloride. General procedure A for reductive aminations with methylamine [00101] An 8.0 M solution of methylamine in EtOH (10.0 equiv) and AcOH (10.0 equiv) are added successively to a cold (0°C), stirred mixture of specified ketone (1.0 equiv) and 3A sieves (1 mg/mg ketone) in 2:1 THF/MeOH (6.0 mL/mmol ketone). Sodium cyanoborohydride (1.10 equiv) is added and the reaction vessel is flushed with N
2, sealed and stirred at 50 °C until TLC analysis indicates complete consumption of the starting ketone. The reaction mixture is cooled to room temperature, quenched with 1 M HCl (approx. pH 1) and vacuum filtered through a pad of Celite, washing through with water and MeOH. The filtrate is concentrated under reduced pressure and the residue is diluted with 0.1 M HCl and washed with Et
2O. The aqueous phase is basified with 1 M NaOH (approx. pH 12) and extracted with CH
2Cl
2. The extract is washed with brine, dried and evaporated, to afford the desired free base. The free base thus obtained may be purified by chromatographic techniques where required. Compounds of type 1 [00102] Compounds of type 1 may be synthesised via the following general procedure 1;
wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 1 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethanone (“Ketone K1”)
[00103] A solution of 1.0 M LiHMDS in THF (375 mL, 0.38 mol) and cyclopropanecarbonyl chloride (20 mL, 0.22 mol) were added sequentially to a stirred solution of methyl homopiperonylate
1 (35 g, 0.18 mol) in THF (250 mL) at −78 °C. The solution was warmed to room temperature and allowed to stand for 30 min. The reaction mixture was then cooled to 0 °C and quenched with 1 M HCl (400 mL), then diluted with water (600 mL) and extracted with Et
2O (3 x 300 mL). The extract was washed with water (2 x 300 mL) and brine (300 mL), dried and evaporated to give a brown oil, which was partially purified by rapid silica filtration (1:4, EtOAc/hexanes). The resulting yellow oil was immediately dissolved in 2:1 DMSO/H
2O (300 mL) and treated with NaCl (40 g, 0.69 mol) and the mixture was stirred at 140 °C for 24 h. The reaction mixture was diluted with water (1 L) and extracted with Et
2O (3 x 300 mL). The extract was washed with water (2 x 300 mL) and brine (300 mL), dried and evaporated. The residual oil was subjected to flash chromatography. Elution with 1:20 EtOAc/hexanes furnished the ketone K1 as a colourless oil (30 g, 82 %). Characterisation data were in good agreement with the previously published synthesis of ketone K1.
4 2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethanamine (UWA-033, MNG6012, “Compound 1A”)
[00104] Following an adapted literature procedure,
3 to freshly activated 3Å sieves (ca 300 mg) was added a solution of the ketone K1 (1.03 g, 5.05 mmol) in anhydrous MeOH (20 mL), ammonium acetate (2.75 g, 35.7 mmol) and sodium cyanoborohydride (438 mg, 6.97 mmol). The mixture was stirred at rt under N
2 for 3 d. The reaction was quenched, and the product extracted and chromatographed by elution with 2:3 EtOAc/hexanes followed by 1:20:79 NEt
3 /MeOH/EtOAc to afford the desired product as a yellow oil (700 mg, 68%).
1 H NMR (500 MHz, CDCl
3): δ 6.69 (d, J = 8.0 Hz, 1H, H7'), 6.64 (d, J = 2.0 Hz, 1H, H4'), 6.60 (dd, J = 8.0, 2.0 Hz, 1H, H6'), 5.85 (s, 2H, H2'), 2.79 (dd, J = 13.5, 4.5 Hz, 1H, H2a), 2.50 (dd, J = 13.5, 8.5 Hz, 1H, H2b), 2.50 (dd, J = 13.5, 8.5 Hz, 1H, H2b ), 2.11 (ddd [app dt], J = 8.5, 8.5, 4.5, 1H, H1), 1.59 (br s, NH
2 +H
2 O), 0.76–0.68 (m, 1H), 0.46–0.38 (m, 2H), 0.17–0.04 (m, 2H). 1
3C NMR (125 MHz, CDCl
3): δ 147.3 and 145.7 (C3a' and C7a'), 133.0 (C5'), 122.0 (C6'), 109.4 and 107.9 (C4' and C7'), 100.6 (C2'), 58.2 (C1), 43.5 (C2), 18.0 (C1''), 2.92 and 2.89 (C2'' and C3''). HRMS– EI (m/z): M
+ calcd for C
12 H
15 NO
2, 205.1103; found, 205.1111. [00105] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as a colourless amorphous powder (mp 138–141 °C).
1H NMR (500 MHz, CDCl
3): δ 6.79 (s, 1H), 6.73 (s, 2H), 5.93–5.91 (m [app AB system], 2H, H2''), 3.21 (dd, J = 14.0, 5.5 Hz, 1H, H2a), 3.04 (dd, J = 14.0, 8.0 Hz, 1H, H2b), 2.68–2.58 (m, 1H), 1.13–1.03 (m, 1H), 0.68–0.51 (m, 3H), 0.10–0.02 (m, 1H). Anal. Calcd for C
12H
16ClNO
2: C, 59.63; H, 6.67; N, 5.79. Found: C, 59.33; H, 6.78; N, 5.67.
2-(1,3-Benzodioxol-5-yl)-1-cyclopropyl-N-methylethanamine (UWA-101, “Compound 1B”)
[00106] Compound 1B is a known compound previously synthesised.
4 Following the general procedure 1, reaction of the ketone K1 (378 mg, 1.85 mmol) with 8.03 M methylamine in MeOH (2.28 mL, 18.3 mmol) and elution with EtOAc afforded the product as a pale yellow oil (331 mg, 82%). The
1H NMR and
13C NMR spectra were identical to those reported.
4 The free base was dissolved in methanolic hydrogen chloride and evaporated to dryness under a stream of N
2. The crude hydrochloride and was recrystallised from 2-propanol as a colourless amorphous powder: mp 157–159 °C (lit. mp 156–158 °C). The
1H NMR spectrum was identical to that reported.
4 (S)-2-(1,3-Benzodioxol-5-yl)-1-cyclopropyl-N-methylethanamine (“Compound 1BS”)
[00107] Compound 1BS is a known compound previously synthesized, and was obtained following the procedure in the literature.
2 – page 119 (R)-2-(1,3-Benzodioxol-5-yl)-1-cyclopropyl-N-methylethanamine (“Compound 1BR”)
[00108] Compound 1BR is a known compound previously synthesized, and was obtained following the procedure in the literature.
2 – page 118 2-(1,3-Benzodioxol-5-yl)-1-cyclopropyl-N-ethylethanamine (MNG5164, “Compound 1C”)
[00109] Compound 1C is a known compound previously synthesized.
2 – page 86 Following the general procedure 1, reaction of the ketone K1 (208 mg, 1.02 mmol) with 2.0 M ethylamine in MeOH (5.00 mL, 10.0 mmol) and elution with EtOAc afforded the product as a pale yellow oil (101 mg, 43%).
1H NMR (500 MHz, CDCl
3): δ 6.72 (d, J = 8.0 Hz, 1H, H7'), 6.69 (d, J = 1.5 Hz, 1H, H4'), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.94–5.91 (m, 2H, H2'), 2.87–2.79 (m, 2H, H2a+H1a'''), 2.68 (dd, J = 14.0, 7.5 Hz, 1H, H2
b ), 2.56 (dq, J = 11.5, 7.0 Hz, 1H, H1
b '''), 1.89 (ddd, J = 9.0, 8.0, 5.0 Hz, 1H, H1), 1.46 (br s, 1H, NH+H
2O), 1.05 (t, J = 7.0 Hz, 3H, H2'''), 0.73–0.64 (m, 1H), 0.58–0.51 (m, 1H), 0.45–0.38 (m, 1H), 0.25–0.19 (m [app sextet], 1H), 0.02–0.05 (m [app sextet], 1H). 13C NMR (125 MHz, CDCl3): δ 147.5 and 145.8 (C3a' and C7a'), 133.2 (C5'), 122.2 (C6'), 109.6 and 108.0 (C4' and C7'), 100.7 (C2'), 65.0 (C1), 42.1 and 41.7 (C2 and C1'''), 16.0 and 15.5 (C1'' and C2'''), 4.9 and 2.0 (C2'' and C3''). HRMS–ESI (m/z): [M+H]
+ calcd for C
14 H
19NO
2, 234.1494; found, 234.1486. [00110] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as colourless rods (mp 154–156 °C).
1H NMR (500 MHz, CDCl
3): δ 9.8–9.5 (2×br s, 2H, NH
2 ), 6.78–6.72 (m, 3H, H4', H6', H7'), 5.98–5.93 (m [app d], 2H, H2'),
3.53 (dd, J = 13.5, 4.0 Hz, 1H, H1a), 3.36–3.25 (m, 1H, H1a''), 3.18–3.07 (m, 2H, H1b+H1b ''), 2.54–2.45 (m, 1H, H2), 1.54 (t, J = 7.5 Hz, 3H, H2''), 1.17–1.07 (m, 1H), 0.72–0.64
(m, 1H), 0.53–0.45 (m, 2H), −0.15–−0.23 (m, 1H). Anal. Calcd for C
14H
20ClNO
2: C, 62.33; H,
7.47; N, 5.19. Found: C, 62.54; H, 7.87; N, 5.17. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]propan-2-amine (UWA-004, KDL03-158, “Compound 1D”)
[00111] Compound 1D is a known compound previously synthesized.2 – page 87 Following the general procedure 1, the ketone K1 (204 mg, 1.00 mmol) was reacted with isopropylamine (852 µL, 9.92 mmol). After 24 h, TLC analysis showed some starting material remained and the reaction was supplemented with further sodium cyanoborohydride (63 mg, 1.00 mmol) to fully consume the starting material. The reaction was quenched and the product extracted and chromatographed by elution with EtOAc which afforded the product as a yellow oil (113 mg, 46%). 1H NMR (500 MHz, CDCl
3): δ 6.72 (d, J = 8.0 Hz, 1H, H7''), 6.69 (d, J = 1.5 Hz, 1H, H4''), 6.64 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.93–5.91 (m [AB system], 2H, H2''), 2.99 (septet, J = 6.0 Hz, 1H, H2), 2.77 (dd, J = 13.5, 5.5 Hz, 1H, H2a'), 2.67 (dd, J = 13.5, 6.5 Hz, 1H, H2b'), 2.02 (ddd, J = 8.5, 6.5, 5.5 Hz, 1H, H1'), 1.02 (d, J = 6.0 Hz, 3H, H1), 0.94 (d, J = 6.0 Hz, 3H, H3), 0.69–0.61 (m, 1H), 0.54–0.47 (m, 1H), 0.44–0.37 (m, 1H), 0.22–0.15 (m [app sextet], 1H), 0.02–−0.04 (m [app sextet], 1H).
13C NMR (125 MHz, CDCl
3): δ 147.4 and 145.8
(C3a'' and C7a''), 133.2 (C5''), 122.3 (C6''), 109.7 and 108.0 (C4'' and C7''), 100.7 (C2''), 61.4 (C1'), 45.4 (C2), 41.7 (C2'), 23.6 and 23.1 (C1 and C3), 16.5 (C1'''), 4.5 and 2.5 (C2''' and C3'''). HRMS–EI (m/z): M
+ calcd for C
15 H
21 NO
2, 247.1572; found, 247.1579. [00112] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as colourless rods (mp 156–159 °C).
1H NMR (500 MHz, CDCl
3): δ 9.55–9.32 (m [app br d], 2H, NH
2), 6.77–6.70 (m, 3H, H4''+H6''+H7''), 5.95–5.91 (m [AB system], 2H, H2''), 3.70–3.60 (m [app septet], 1H, H2), 3.56 (dd, J = 13.5, 4.5 Hz, 1H, H2a'), 3.20 (dd, J = 13.5, 9.5 Hz, 1H, H2b '), 2.56–2.46 (m, 1H, H1'), 1.56 (d, J = 6.5 Hz, 3H, H1), 1.46 (d, J = 6.5 Hz, 3H, H3), 1.27–1.18 (m, 1H), 0.71–0.63 (m, 1H), 0
.49–0.41 (m, 1H), 0.38–0.31 (m [app sextet], 1H), −0.20–−0.27 (m [app sextet], 1H). Anal. Calcd for C15H22 ClNO2: C, 63.48; H, 7.81; N, 4.94. Found: C, 63.56; H, 8.05; N, 4.85. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]cyclopropanamine (UWA-037, MNG6028, GAP-068, “Compound 1E”)
[00113] Following an adapted literature method,
5 to a suspension of freshly activated sieves (ca 100 mg) in anhydrous MeOH (2 mL) was added Compound 1A (202 mg, 0.984 mmol) and (1- ethoxycyclopropoxy)trimethylsilane (200 µL, 0.995 mmol). The mixture was stirred under N
2 for 1 h then sodium cyanoborohydride (94 mg, 1.50 mmol) was added and the mixture heated at 50 °C for 20 h. The reaction was quenched, extracted and the product was then eluted with 4:1 EtOAc/hexanes followed by EtOAc to afford the desired product as a colourless oil (56 mg, 23%).
1H NMR (500 MHz, CDCl
3): δ 6.73 (d, J = 8.0 Hz, 1H, H7''), 6.70 (d, J = 1.5 Hz, 1H, H4''), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.93 (s, 2H, H2''), 2.81 (dd, J = 13.5, 5.0 Hz, 1H, H2a'), 2.74 (dd, J = 13.5, 7.5 Hz, 1H, H2b '), 2.12–2.07 (m, 1H, H1), 1.99 (ddd, J = 9.0, 7.5, 5.5 Hz, 1H, H1'), 1.70
(br s, 1H, NH+H2O), 0.73–0.64 (m, 1H), 0.59–0.52 (m, 1H), 0.52–0.24 (m, 6H), 0.02–−0.04 (m,
1H). 13
C NMR (125 MHz, CDCl
3): δ 147.5 and 145.8 (C3a'' and C7a''), 133.3 (C5''), 122.2 (C6''), 109.6 and 108.0 (C4'' and C7''), 100.8 (C2''), 65.6 (C1'), 41.7 (C2'), 29.3 and 16.1 (C1 and C1'''), 7.5, 6.4, 5.0, 2.6 (C2, C3, C2''', C3'''). HRMS–EI (m/z): M
+ calcd for C
15H
19NO
2, 245.1416; found, 245.1414. [00114] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as a colourless amorphous powder (mp 128–131 °C).
1H NMR (500 MHz. CDCl
3)
: δ 9.84 (br s, 1H, NHa), 9.62 (br s, 1H, NHb), 6.75 (dd, J = 7.5, 1.5 Hz, 1H, H6''), 6.73 (d, J = 1.5 Hz, 1H, H4''), 6.71 (d, J = 7.5 Hz, 1H, H7''), 5.94–5.91 (m [AB system], 2H, H2''), 3.55 (dd, J = 13.5, 3.5 Hz, 1H,
H2a'), 3.09 (dd, J = 13.5, 9.5 Hz, 1H, H2b '), 2.67–2.67 (m, 1H), 2.58–2.50 (m, 1H), 1.48–1.41 (m, 1H), 1.34–1.26 (m, 1H), 1.18–1.09 (m, 1H),
0.93–0.78 (m, 2H), 0.69–0.61 (m, 1H), 0.57–0.49 (m, 1H), 0.49– 0.42 (m, 1H), −0.21–−0.29 (m, 1H). Anal. Calcd for C15 H
20ClNO
2: C, 63.94; H, 7.15; N, 4.97. Found: C, 64.05; H, 7.43; N, 4.89. [00115] Alternatively, following general procedure 1, Cyclopropylamine (2.10 mL, 30.3 mmol) and AcOH (1.90 mL, 33.2 mmol) were added successively to a cold (0°C), stirred mixture of ketone K1 (623 mg, 3.05 mmol) and 3A sieves (652 mg) in 1:1 THF/MeOH (18 mL). Sodium cyanoborohydride (216 mg, 3.44 mmol) was added and the reaction vessel was flushed with N
2, sealed and stirred at 50 °C for 96 h before being cooled to room temperature and quenched with 4 M HCl (15 mL). The resulting mixture was vacuum filtered through a pad of Celite, washing through with water (50 mL) and MeOH (3 × 50 mL). The filtrate was concentrated under reduced pressure and the residue was basified with 4 M NaOH (30 mL) and extracted with CH
2Cl
2 (3 × 75 mL). The extract was washed with brine (60 mL), dried and evaporated, and the residue was subjected to flash chromatography. Gradient elution with 1:3 EtOAc/hexanes → 1:1 EtOAc/hexanes → 1:49:50 NEt
3/EtOAc/hexanes afforded the secondary amine 1E as a colourless oil (635 mg, 85%). The spectroscopic data for 1E synthesised via this method match those obtained previously. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]propan-1-amine (UWA-031, MNG5166, “Compound 1F”)
[00116] Following the general procedure 1, reaction of the ketone K1 (204 mg, 1.00 mmol) with n- propylamine (822 µL, 10.0 mmol) and elution with 2:3 EtOAc/hexanes followed by EtOAc afforded the product as a pale yellow oil (105 mg, 42%).
1H NMR (500 MHz, CDCl
3): δ 6.72 (d, J = 7.5 Hz, 1H, H7''), 6.69 (d, J = 1.5 Hz, 1H, H4''), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.92 (s, 2H, H2''), 2.81 (dd, J = 8.5, 5.0 Hz, 1H, H2a'), 2.74 (ddd, J = 11.0, 8.5, 6.0 Hz, 1H, H1a), 2.67 (dd, J = 13.5, 8.0 Hz, 1H, H2b'), 2.49 (ddd, J = 11.5, 8.5, 6.0 Hz, 1H, H1b), 1.87 (ddd, J = 9.0, 8.0, 5.0 Hz, 1H, H1'), 1.80–1.20 (m, 3H, H2+NH+H
2 O), 0.85 (t, J = 7.5 Hz, 3H, H3), 0.73–0.64 (m, 1H),
0.58–0.51 (m, 1H), 0.44–0.37 (m, 1H), 0.25–0.18 (m [app sextet], 1H), 0.02–−0.05 (m [app sextet], 1H). 13C NMR (125 MHz, CDCl
3): δ 147.5 and 145.8 (C3a'' and C7a''), 133.3 (C5''), 122.2 (C6''), 109.6 and 108.0 (C4'' and C7''), 100.7 (C2''), 64.9 (C1'), 49.8 and 41.7 (C1 and C2'), 23.3 (C2), 16.0 and 11.7 (C3 and C1'''), 4.8 and 2.0 (C2''' and C3'''). HRMS–EI (m/z): M
+ calcd for C15 H21 NO
2, 247.1572; found, 247.1525. [00117] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2 O as colourless rods (mp 157–158 °C).
1H NMR (500 MHz, CDCl
3): δ 9.66 (br s, 1H, NHa),
9.38 (br s, 1H, NHb), 6.77–6.70 (m, 3H, H4''+H6''+H7''), 5.95–5.92 (m [AB system], 2H, C2''), 3.52 (dd, J = 13.5, 4.5 Hz, 1H, H2a'), 3.17–3.04 (m, 2H, H1a+H2b'), 3.00–2.90 (m, 1H, H1b ), 2.54–2.46 (m, 1H, H1'), 2.03–1.94 (m [app sextet], 2H, H2), 1.14–1.05 (m, 1H), 0.99 (t, J = 7.0 Hz, 3H, H3), 0.70–0.62 (m, 1H), 0.55–0.45 (m, 2H), −0.14–−0.22 (m, 1H). Anal. Calcd for C15 H
22ClNO
2: C, 63.48; H, 7.81; N, 4.94. Found: C, 63.59; H, 8.02; N, 4.88. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]prop-2-en-1-amine (UWA-032, MNG6006, “Compound 1G”)
[00118] Following the general procedure 1, reaction of the ketone K1 (204 mg, 1.00 mmol) with allylamine (750 µL, 10.0 mmol) and elution with EtOAc afforded the product as a pale yellow oil (172 mg, 70%).
1H NMR (500 MHz, CDCl
3): δ 6.73 (d, J = 7.5 Hz, 1H, H7''), 6.69 (d, J = 1.5 Hz, 1H, H4''), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.93 (s, 2H, H2''), 5.88–5.78 (m, 1H, H2), 5.09 (dddd [app dq], J = 17.0, 1.5, 1.5, 1.5 Hz, 1H, H3a), 5.06–5.02 (m [app dq], 1H, H3b ), 3.43 (dddd, J = 14.0, 6.0, 1.5, 1.5 Hz, 1H, H1a), 3.23 (dddd, J = 14.5, 6.5, 1.5, 1.5 Hz, 1H, H1b ), 2.83 (dd, J = 14.0, 5.0 Hz, 1H, H2a'), 2.70 (dd, J = 14.0, 8.0 Hz, 1H, H2b'), 1.94 (ddd, J = 8.5, 8.0, 5.0 Hz, 1H, H1'), 1.59 (br s, 1H, NH+H
2O), 0.73–0.64 (m, 1H), 0.60–0.53 (m, 1H), 0.46–0.39 (m, 1H), 0.27–0.20 (m [app sextet], 1H), 0.03–−0.04 (m [app sextet], 1H).
13C NMR (125 MHz, CDCl
3 ): δ 147.5 and 145.9 (C3a'' and C7a''), 137.2 (C2), 133.1 (C5''), 122.3 (C6''), 115.5 (C3), 109.6 and 108.1 (C4'' and C7''), 100.8 (C2''), 63.9 (C1'), 50.1 and 41.8 (C1 and C2'), 15.9 (C1'''), 5.0 and 2.0 (C2''' and C3'''). HRMS–ESI (m/z): [M+H]
+ calcd for C
15 H
19NO
2, 246.1494; found, 246.1496. [00119] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as a colourless amorphous powder (mp 148–150 °C).
1H NMR (500 MHz, CDCl
3): δ 9.90–9.68 (m [app br d], 2H, NH
2), 6.76–6.71 (m, 3H, H4''+H6''+H7''), 6.20–6.11 (m, 1H, H2), 5.95–5.92 (m [AB system], 2H, H2''), 5.47–5.40 (m, 2H, H3a+H3b), 3.80–3.68 (m, 2H, H1), 3.44 (dd, J = 13.5, 4.5 Hz, 1H, H2a'), 3.09 (dd, J = 13.5, 9.0 Hz, 1H, H2b'), 2.55–2.45 (m [app octet], 1H, H1'), 1.19– 1.10 (m, 1H), 0.73–0.65 (m, 1H), 0.54–0.41 (m, 2H), −0.13–−0.20 (m, 1H). Anal. Calcd for C15 H
20ClNO
2: C, 63.94; H, 7.15; N, 4.97. Found: C, 63.88; H, 7.16; N, 4.94. [00120] N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]-2-methylpropan-1-amine (UWA-035, MNG6018, “Compound 1H”)
[00121] Following the general procedure 1, reaction of the ketone K1 (203 mg, 0.994 mmol) with isobutylamine (993 µL, 9.99 mmol) and elution with 2:3 EtOAc/hexanes followed by EtOAc afforded the product as a colourless oil (93 mg, 36%).
1H NMR (500 MHz, CDCl
3): δ 6.73 (d, J = 8.0 Hz, 1H, H7''), 6.70 (d, J = 1.5 Hz, 1H, H4''), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.92 (s, 1H, H2''), 2.80 (dd, J = 13.5, 5.0 Hz, 1H, H2a'), 2.67 (dd, J = 13.5, 7.5 Hz, 1H, H2
b'), 2.57 (dd, J = 11.5, 7.0 Hz, 1H, H1a), 2.34 (dd, J = 11.5, 6.5 Hz, 1H, H1b), 1.85 (ddd, J = 9.0, 7.5, 5.0 Hz, 1H, H1'), 1.72–1.60 (m [app nonet], 1H, H2), 1.49 (br s, 1H, NH+H
2O), 0.85–0.80 (m [app dd], 6H, 2×CH
3 ) 0.72–0.64 (m, 1H), 0.57–0.50 (m, 1H), 0.44– 0.37 (m, 1H), 0.24–0.17 (m [app sextet], 1H), 0.02–−0.05 (m [app sextet], 1H).
13C NMR (125 MHz, CDCl
3): δ 147.5 and 145.8 (C3a'' and C7a''), 133.4 (C5''), 122.2 (C6''), 109.7 and 108.0 (C4'' and C7''), 100.7 (C2''), 64.9 (C1'), 55.9 and 41.6 (C1 and C2'), 28.2, 20.7, 20.6, 16.1 (C2, 2×CH
3 , C1'''), 4.7 and 2.1 (C2''' and C3'''). HRMS–ESI (m/z): [M+H]+ calcd for C16 H
23NO
2 , 262.1807; found, 262.1803. [00122] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as a colourless amorphous powder (mp 185–187 °C).
1H NMR (500 MHz, CDCl
3): δ 9.64 (br s, 1H, NHa), 8.97 (br s, 1H, NHb), 6.79–6.75 (m, 2H, H4''+H6''), 6.71 (d, J = 8.0 Hz, 1H, H7''), 5.95–5.92 (m [AB system], 2H, H2''), 3.57 (dd, J = 13.5, 4.5 Hz, 1H, H2a'), 3.07 (dd, J = 13.5, 9.5 Hz, 1H, H2b'), 3.00–2.91 (m, 1H, H1a), 2.88–2.79 (m, 1H, H1b ), 2.64–2.56 (m, 1H, H1'), 2.37–2.25 (m [app nonet], 1H, H2), 1.15–1.06 (m, 7H, 2×CH
3+cyclopropyl), 0.68–0.61 (m, 2H), 0.56–0.48 (m, 1H), −0.09– −0.16 (m, 1H). Anal. Calcd for C
16H
24ClNO
2: C, 64.53; H, 8.12; N, 4.70. Found: C, 64.60; H, 8.36; N, 4.62. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]butan-1-amine (UWA-036, MNG6026, “Compound 1I”)
[00123] Following the general procedure 1, reaction of the ketone K1 (203 mg, 0.994 mmol) with n- butylamine (852 µL, 8.62 mmol) and elution with 3:7 EtOAc/hexanes followed by EtOAc afforded the product as a colourless oil (223 mg, 86%).
1H NMR (500 MHz, CDCl
3): δ 6.70 (d, J = 8.0 Hz, 1H, H7''), 6.67 (d, J = 1.5 Hz, 1H, H4''), 6.63 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.90 (s, 2H, H2''), 2.82–2.72 (m [app
dd+ddd], 2H, H1a+H2a'), 2.66 (dd, J = 13.5, 7.5 Hz, 1H, H2b '), 2.50 (ddd, J = 11.5, 8.5, 6.5 Hz, 1H, H1b), 1.85 (ddd, J = 9.0, 7.5, 5.0 Hz, 1H, H1'), 1.53 (br s, NH+H
2O), 1.45–1.31 (m, 2H, H2), 1.30–1.21 (m, 2H, H3), 0.85 (t, J = 7.0 Hz, 3H, H4), 0.71–0.63 (m, 1H), 0.55–0.49 (m,
1H), 0.42–0.36 (m, 1H), 0.23–0.17 (m, 1H), 0.00–−0.06 (m, 1H). 13C NMR (125 MHz, CDCl 3 ): δ 147.4 and 145.8 (C3a'' and C7a''), 133.2 (C5''), 122.2 (C6''), 109.6 and 108.0 (C4'' and C7''), 100.7 (C2''), 65.0 (C1'), 47.6, 41.6, 32.3, 20.4 (C1, C2, C3, C2'), 16.0 and 13.9 (C4 and C1'''), 4.7 and 2.0 (C2''' and C3'''). HRMS–ESI (m/z): [M+H]
+ calcd for C
16H
23NO
2 , 262.1807; found, 262.1800. [00124] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as a colourless amorphous powder (mp 163–165 °C).
1H NMR (500 MHz, CDCl
3): δ 9.65 (br s, 1H, NH
a), 6.50 (br s, 1H, NHb), 6.77–6.73 (m, 2H, H4''+H6''), 6.71 (d, J = 8.0 Hz, 1H, H7''), 5.94– 5.91 (m [AB system], 2H, H2''), 3.54 (dd, J = 13.5, 3.5 Hz, 1H, H2a'), 3.20–3.10 (m, 1H, H1a), 3.07 (dd, J = 13.5, 10.5 Hz, 1H, H2b '), 3.02–2.92 (m, 1H, H1b), 2.54–2.46 (m, 1H, H1'), 1.99–1.89 (m, 2H, H2), 1.44–1.35 (m [app sextet], 2H, H3), 1.13–1.04 (m, 1H), 0.91 (t, J = 7.0 Hz, 3H, H4), 0.68–0.61 (m, 1H), 0.53–0.42 (m, 2H), −0.18–−0.26 (m, 1H). Anal. Calcd for C
16H
24ClNO
2: C, 64.53; H, 8.12; N, 4.70. Found: C, 64.52; H, 8.22; N, 4.64. 2-(1,3-Benzodioxol-5-yl)-N-benzyl-1-cyclopropylethanamine (UWA-034, MNG6016, “Compound 1J”)
[00125] Following the general procedure 1, reaction of the ketone K1 (209 mg, 1.02 mmol) with benzylamine (1.09 mL, 9.98 mmol) and elution with 2:3 EtOAc/hexanes afforded the product as a pale yellow oil (261 mg, 86%).
1H NMR (500 MHz, CDCl
3): δ 7.31–7.17 (m, 5H, H2'', H3'', H4'', H5''and H6''), 6.73 (d, J = 8.0 Hz, 1H, H7'), 6.68 (d, J = 1.5 Hz, 1H, H4'), 6.65 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.94–5.92 (m [AB system], 2H, H2'), 3.93 (d, J = 13.5 Hz, 1H, NCHaH), 3.80 (d, J = 13.5 Hz, 1H, NCHHb), 2.85 (dd, J = 13.5, 5.0 Hz, 1H, H2a), 2.73 (dd, J = 13.5, 7.5 Hz, 1H, H2b), 1.95 (ddd, J = 9.0, 8.0, 5.0 Hz, 1H, H1), 1.71 (br s, NH+H
2 O), 0.79–0.70 (m, 1H), 0.56 (dddd, J = 9.0, 8.0, 5.5, 4.5 Hz, 1H), 0.42 (dddd, J = 9.0, 8.0, 5.5, 4.5 Hz, 1H), 0.23–0.16 (m [app sextet], 1H), 0.01–−0.06 (m, 1H). 13C NMR (125 MHz, CDCl
3): δ 147.5 and 145.9 (C3a’ and C7a'), 140.5 (C1''), 133.1 (C5'), 128.3, 127.9, 126.8 (C2'', C3'', C4'', C5'', C6''), 122.3 (C6'), 109.7 and 108.1 (C4' and C7'), 100.8 (C2'), 63.7 (C1), 51.6 and 41.6 (C2 and NCH
2), 15.9 (C1'''), 4.8 and 2.0 (C2''' and C3'''). HRMS–EI (m/z): [M+H]
+ calcd for C
19H
21NO
2, 296.1645; found, 296.1648.
[00126] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as a colourless amorphous powder (mp 144–146 °C).
1H NMR (500 MHz, CDCl
3): δ 9.95 (br s, 2H, NH2 ), 7.63–7.59 (m [app d], 2H, H2'' and H6''), 7.38–7.33 (m [app t], 2H, H3'' and H5''), 7.31– 7.27 (m, 1H, H4''), 6.70 (d, J = 8.0 Hz, 1H, H7'), 6.63 (dd, J = 8.0, 1.5 Hz, 2H, H6'), 6.61 (d, J = 1.5 Hz, 1H, H4'), 5.95–5.92 (m [AB system], 2H, H2''), 4.16–4.03 (m, 2H, NCH2 ), 3.38 (dd, J = 13.5, 4.0 Hz, 1H, H2a), 3.00 (dd, J = 13.5, 9.5 Hz, 1H, H2b), 2.26–2.18 (m, 1H, H1), 1.15–1.06 (m, 1H), 0.63– 0.60 (m, 1H), 0.44–0.36 (m, 1H), 0.29–0.22 (m [app sextet], 1H), −0.33–−0.39 (m, 1H). Anal. Calcd for C
19H
22 ClNO
2: C, 68.77; H, 6.68; N, 4.22. Found: C, 68.78; H, 6.70; N, 4.19. N-[2-(1,3-Benzodioxol-5-yl)-1-cyclopropylethyl]cyclopropanecarboxamide (MNG6022, “Compound 1K”)
[00127] Following an adapted literature procedure,
6 to a stirred solution of Compound 1A (310 mg, 1.51 mmol) and NEt
3 (210 µL, 1.51 mmol) in anhydrous CH
2Cl
2 (2.5 mL) at 0 °C under N
2 slowly added a solution of cyclopropanecarbonyl chloride (53, 172 mg, 1.65 mmol) in CH
2Cl
2 (2.5 mL). The solution was then allowed to warm to rt. After 2 h, the mixture was diluted with CH
2Cl
2 (20 mL), then washed with water (20 mL), 1 M HCl (20 mL), saturated NaHCO
3 solution (20 mL), water (20 mL), brine (20 mL), dried and evaporated to afford a white solid. This material was recrystallised from EtOAc/hexanes as colourless rods (244 mg, 59%): mp 128– 129 °C. IR (dry film) ν¯ max (cm
-1): 3302 (m, N−H), 1632 (s, C−O).
1H NMR (500 MHz, CDCl
3): δ 6.74 (d, J = 8.0 Hz, 1H, H7''), 6.72 (d, J = 1.5 Hz, 1H, H4''), 6.66 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.95–5.92 (m [AB system], 2H, H2''), 5.52 (br d, J = 7.5 Hz, 1H, NH), 3.44–3.36 (m, 1H, H1'), 2.85 (d, J = 6.0 Hz, 2H, H2'), 1.32–1.25 (m, 1H), 0.99–0.90 (m, 2H), 0.81–0.68 (m, 3H), 0.54– 0.47 (m, 1H), 0.46–0.39 (m, 1H), 0.36–0.28 (m [app sextet], 1H), 0.19–0.12 (m [app sextet], 1H).
13C NMR (125 MHz, CDCl
3): δ 172.7 (C=O), 147.4 and 146.0 (C3a'' and C7a''), 131.7 (C5''), 122.7 (C6''), 110.2 and 108.0 (C4'' and C7''), 100.8 (C2''), 55.0 (C1'), 40.5 (C2'), 15.0 and 14.9 (C1 and C1'''), 7.0, 6.9, 4.0, 3.2 (C2, C3, C2''', C3'''). HRMS–ESI (m/z): [M+H]
+ calcd for C
16 H
19 NO
3 , 274.1443; found, 274.1438. Anal. Calcd for C
16 H
19 NO
3: C, 70.31; H, 7.01; N, 5.12. Found: C, 70.17; H, 7.18; N, 5.06. N-(2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropylethyl)prop-2-yn-1-amine (UWA-005, “Compound 1L”)
[00128] Compound 1L is a known compound, obtained by the previously reported procedure.
2 – page 86 2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-((R)-1-phenylethyl)ethan-1-amine (“Compound 1M”)
[00129] Compound 1M is a known compound, obtained by the previously reported procedure
.2 – page 115 (R)-2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-((R)-1-phenylethyl)ethan-1-amine (“Compound 1MR”)
[00130] Compound 1MR is a known compound, obtained by the previously reported procedure
.2 – page 115 (S)-2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-((R)-1-phenylethyl)ethan-1-amine (“Compound 1MS”)
[00131] Compound 1MS is a known compound, obtained by the previously reported procedure.
2 – page 115 2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-methyl-N-((R)-1-phenylethyl)ethan-1-amine (“Compound 1N”)
[00132] Compound 1N is a known compound, obtained by the previously reported procedure.
2 – page 116 (R)-2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-methyl-N-((R)-1-phenylethyl)ethan-1- amine (“Compound 1NR”)
[00133] Compound 1NR is a known compound, obtained by the previously reported procedure.
2 – page 116 (S)-2-(benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-methyl-N-((R)-1-phenylethyl)ethan-1- amine (“Compound 1NS”)
[00134] Compound 1NS is a known compound, obtained by the previously reported procedure.
2 – page 116 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropyl-N-(2,2,2‐trifluoroethyl)ethan-1-amine (UWA-044, JLK2098, "Compound 1O")
[00135] A sealed mixture of freshly activated 3 Å sieves (ca 300 mg), ketone K1 (205 mg, 1.00 mmol), 2,2,2-trifluoroethylamine hydrochloride (1.36 g, 10.0 mmol), sodium acetate (820 mg, 10.0 mmol) and sodium cyanoborohydride (63 mg, 1.0 mmol) in anhydrous THF (2 mL) was stirred at 50 °C for 3 d. The reaction was quenched with conc. HCl, filtered through a pad of Celite with H
2O, basified and extracted with DCM (3 × 50 mL). The extract was washed with H
2O (2 × 50 mL) and brine (50 mL), dried and evaporated, and the residue was subjected to flash chromatography. Elution with 1:9 EtOAc/Hex then 3:7 EtOAc/Hex afforded the secondary
amine 1O as a colourless oil (48 mg, 17 %).
1H NMR (400 MHz, CDCl
3): δ 6.74 (d, J = 7.9 Hz, 1H, H7'), 6.69 (d, J = 1.5 Hz, 1H, H4'), 6.65 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.93 (s, 2H, H2'), 3.37–3.26 (m, 1H, H1''a), 3.26–3.15 (m, 1H, H1''b), 2.83 (dd, J = 13.8, 4.9 Hz, 1H, H2a), 2.66 (dd, J = 13.8, 7.7 Hz, 1H, H2b), 2.10–2.02 (m, 1H, H1), 0.73–0.55 (m, 2H), 0.50–0.41 (m, 1H), 0.29–0.20 (m [app. sextet], 1H), 0.08 to –0.02 (m, 1H).
13C NMR (100 MHz, CDCl
3): δ 147.8 and 146.2 (C3a' and C7a'), 132.4 (C5'), 125.7 (q, J = 279.4 Hz, C2''), 122.4 (C6'), 109.7 (C4'), 108.3 (C7'), 101.0 (C2'), 63.5 (C1), 48.1 (q, J = 30.9 Hz, C1''), 41.9 (C2), 15.7 (C1'''), 4.9 and 1.9 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
14H
17F
3NO
2 + 288.1206; found, 288.1205. [00136] The free base was converted to the hydrochloride salt, which crystallised from DCM/Hexane as off-white rhomboids.
1H NMR (400 MHz, CDCl
3): δ 10.39 (br. s, 2H, NH
2), 6.80–6.71 (m, 3H, H4'/6'/7'), 5.94 (m [AB], 2H, H2'), 3.89–3.67 (m, 2H, H1''), 3.50 (dd, J = 13.4, 3.7 Hz, 1H, H2a), 3.13 (dd, J = 13.4, 9.2 Hz, 1H, H2b), 2.81–2.69 (m, 1H, H1), 1.18–1.06 (m, 1H), 0.77–0.66 (m, 1H), 0.61–0.51 (m, 2H), –0.02 to –0.13 (m, 1H). 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropyl-N-(3-hydroxypropyl)ethan-1-amine (UWA-047, JLK2100, "Compound 1P")
[00137] Following the general procedure 1, ketone K1 (204 mg, 1.00 mmol) was reacted with propanolamine (765 μL, 10.0 mmol) and the crude product was subjected to flash chromatography. Elution with 35:65:1 EtOAc/Hex/NEt
3 afforded the secondary amine 1P as a pale-yellow oil (233 mg, 88 %).
1H NMR (400 MHz, CDCl
3): δ 6.72 (d, J = 7.9 Hz, 1H, H7'), 6.66 (d, J = 1.6 Hz, 1H, H4'), 6.62 (dd, J = 7.8, 1.6 Hz, 1H, H6'), 5.91 (s, 2H, H2'), 3.80–3.70 (m, 2H, H3''), 3.03 (ddd, J = 11.7, 6.9, 5.0 Hz, 1H, H1''a), 3.00 (br. s, 2H, OH + NH), 2.85–2.73 (m, 2H, H1''b/2a), 2.65 (dd, J = 13.7, 7.7 Hz, 1H, H2b), 1.87 (ddd, J = 8.6, 7.8, 5.0 Hz, 1H, H1), 1.71– 1.57 (m, 2H, H2''), 0.72–0.61 (m, 1H, H1'''), 0.61–0.53 (m, 1H), 0.49–0.40 (m, 1H), 0.29–0.21 (m [app. sextet], 1H), 0.05 to –0.03 (m [app. sextet], 1H).
13C NMR (100 MHz, CDCl
3): δ 147.7 and 146.1 (C3a' and C7a'), 132.7 (C5'), 122.4 (C6'), 109.7 (C4'), 108.3 (C7'), 100.9 (C2'), 65.1 (C1), 64.4 (C3''), 47.8 (C1''), 41.7 (C2), 31.5 (C2''), 15.9 (C1'''), 5.3 and 2.3 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
15H
22NO
3 + 264.1594; found, 264.1593. [00138] The free base was converted to the hydrochloride salt, which crystallised from i- PrOH/Et
2O as white plates.
1H NMR (400 MHz, CDCl
3): δ 9.41 (br. s, 1H, NH), 9.04 (br. s, 1H, NH), 6.79–6.72 (m, 3H, H4'/6'/7'), 5.94 (s, 2H, H2'), 3.91–3.79 (m, 2H, H3''), 3.54–3.42 (m, 1H, H1''a), 3.34 (dd, J = 13.8, 6.0 Hz, 1H, H2a), 3.22–3.07 (m, 2H, H1''b/2b), 2.54–2.43 (m, 1H, H1),
2.15–1.99 (m, 2H, H2''), 1.24–1.13 (m, 1H), 0.78–0.68 (m, 1H), 0.63–0.53 (m, 1H), 0.50–0.41 (m [app. sextet], 1H), 0.01 to –0.08 (m [app. sextet], 1H). 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropylethyl-N-cyclobutanamine; N-(2- (benzo[d][1,3]dioxol-5-yl)-1-cyclopropylethyl)cyclobutanamine; (UWA-055, JLK2043, "Compound 1Q")
[00139] Following general procedure 1 but using half the excess of amine, ketone K1 (102 mg, 0.500 mmol) was reacted with cyclobutylamine (0.21 mL, 2.5 mmol). The reaction was quenched with conc. HCl and filtered through a pad of Celite with H
2O. The solution was washed with DCM (3 × 50 mL), then basified and extracted with EtOAc (3 × 20 mL). The organic extracts were combined and washed with H
2O (2 × 20 mL) and brine (20 mL), then dried and evaporated to give the secondary amine 1Q as a pale brown oil (111 mg, 86 %).
1H NMR (400 MHz, CDCl
3): δ 6.73 (d, J = 7.8 Hz, 1H, H7'), 6.67 (d, J = 1.5 Hz, 1H, H4'), 6.64 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.93 (s, 2H, H2'), 3.54–3.44 (m, 1H, H1''), 2.79 (dd, J = 13.6, 5.1 Hz, 1H, H2a), 2.62 (dd, J = 13.6, 8.0 Hz, 1H, H2b), 2.26–2.09 (m, 2H), 1.88–1.81 (m, 1H, H1), 1.63–1.51 (m, 3H), 1.45–1.34 (m, 1H), 0.71–0.60 (m, 1H, H1'''), 0.58–0.49 (m, 1H), 0.45–0.36 (m, 1H), 0.23– 0.14 (m [app. sextet], 1H), 0.01 to –0.07 (m, 1H).
13C NMR (100 MHz, CDCl
3): δ 147.7 and 146.0 (C3a' and C7a'), 133.4 (C5'), 122.4 (C6'), 109.7 (C4'), 108.2 (C7'), 100.9 (C2'), 62.3 (C1), 51.8 (C1''), 42.1 (C2), 32.0 and 31.8 (C2'' and C4''), 16.3 (C1'''), 14.6 (C3''), 5.0 and 2.3 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
22NO
2 + 260.1645; found, 260.1643. [00140] The free base was converted to the hydrochloride salt, which crystallised from PhMe (toluene) as white granules.
1H NMR (400 MHz, CDCl
3): δ 9.78 (br. s, 2H, NH
2), 6.76– 6.68 (m, 3H, H4'/6'/7'), 5.93 (m [AB], 2H, H2'), 3.96 (dddd [app. pentet], J
1 = J
2 = J
3 = J
4 = 8.2 Hz, 1H, H1''), 3.52 (dd, J = 13.4, 3.8 Hz, 1H, H2a), 3.05 (dd, J = 13.4, 10.3 Hz, 1H, H2b), 2.43– 2.19 (m, 3H), 2.05–1.93 (m, 1H), 1.88–1.72 (m, 1H), 1.11–0.99 (m, 1H), 0.68–0.58 (m, 1H), 0.49–0.35 (m, 2H), –0.23 to –0.34 (m, 1H). 1‐[2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropylethyl]pyrrolidine (UWA-048, JLK2101, "Compound 1R")
[00141] Following general procedure 1, ketone K1 (205 mg, 1.00 mmol) was reacted with pyrrolidine (727 μL, 10.0 mmol) and the crude product was subjected to flash chromatography. Elution with 1:4 EtOAc/Hex followed by 20:80:1 EtOAc/Hex/NEt
3 afforded the tertriary amine 1R as a pale-yellow oil (230 mg, 89 %).
1H NMR (400 MHz, CDCl
3): δ 6.70 (d, J = 1.2 Hz, 1H, H4'), 6.65 (dd, J = 7.8, 0.3 Hz, 1H, H7'), 6.63 (dd, J = 7.9, 1.4 Hz, 1H, H6'), 5.85 (m [AB], 2H, H2'), 2.91 (dd, J = 13.7, 4.5 Hz, 1H, H2a), 2.74 (dd, J = 13.7, 7.0 Hz, 1H, H2b), 2.71–2.60 (m, 4H, H2''/5''), 1.78–1.67 (m, 4H, H3''/4''), 1.51 (ddd, J = 11.6, 7.0, 4.5 Hz, 1H, H1), 0.73–0.61 (m, 1H, H1'''), 0.51–0.41 (m, 1H), 0.31–0.22 (m, 1H), 0.20–0.10 (m [app. sextet], 1H), –0.25 to –0.35 (m, 1H).
13C NMR (100 MHz, CDCl
3): δ 147.1 and 145.5 (C3a' and C7a'), 134.2 (C5'), 122.5 (C6'), 110.1 (C4'), 107.7 (C7'), 100.6 (C2'), 70.9 (C1), 52.2 (C2''/5''), 40.9 (C2), 23.3 (C3''/4''), 14.6 (C1'''), 6.1 and 3.0 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
22NO
2 + 260.1645; found, 260.1643. [00142] The free base was converted to the hydrochloride salt, which crystallised from i- PrOH/Et
2O as colourless plates.
1H NMR (400 MHz, CDCl
3): δ 6.75–6.72 (m, 3H, H4'/6'/7'), 5.95 (m [AB], 2H, H2'), 3.94–3.84 (m, 1H), 3.78–3.68 (m, 1H), 3.44 (dd, J = 14.0, 4.6 Hz, 1H, H2a), 3.15 (dd, J = 14.0, 8.8 Hz, 1H, H2b), 3.01–2.85 (m, 2H), 2.51–2.42 (m, 1H, H1), 2.34–2.19 (m, 2H, H3''a/4''a), 2.08–1.93 (m, 2H, H3''b/4''b), 1.29–1.18 (m, 1H), 0.80–0.72 (m, 1H), 0.60–0.51 (m, 1H), 0.44–0.35 (m, 1H), –0.12 to –0.21 (m, 1H). 4‐[2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropylethyl]morpholine (UWA-049, JLK2102, "Compound 1S")
[00143] Following general procedure 1 ketone K1 (205 mg, 1.00 mmol) was reacted with morpholine (872 μL, 10.0 mmol) and the crude product was subjected to flash chromatography. Elution with 5:95:1 EtOAc/Hex/NEt
3 afforded the tertiary amine 1S as a colourless oil (206 mg, 75 %).
1H NMR (400 MHz, CDCl
3): δ 6.73 (d, J = 1.6 Hz, 1H, H4'), 6.70 (d, J = 7.9 Hz, 1H, H7'), 6.65 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.91 (m [AB], 2H, H2'), 3.74–3.64 (m, 4H, H2''/6''), 2.83 (dd, J = 13.1, 6.9 Hz, 1H, H2a), 2.82–2.74 (m, 2H, H3''a/5''a), 2.70 (dd, J = 13.9, 6.5 Hz, 1H, H2b),
2.65–2.58 (m, 2H, H3''b/5''b), 1.75 (ddd [app. dt], J = 9.5, 6.3, 6.3 Hz, 1H, H1), 0.77–0.66 (m, 1H, H1'''), 0.58–0.49 (m, 1H), 0.39–0.30 (m, 1H), 0.28–0.19 (m [app. sextet], 1H), –0.17 to – 0.26 (m, 1H).
13C NMR (100 MHz, CDCl
3): δ 147.3 and 145.6 (C3a' and C7a'), 134.6 (C5'), 122.4 (C6'), 110.0 (C4'), 107.9 (C7'), 100.8 (C2'), 71.8 (C1), 67.7 (C2''/6''), 50.6 (3''/5''), 38.4 (C2), 11.7 (C1'''), 5.5 and 2.7 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
22NO
3 + 276.1594; found, 276.1592. [00144] The free base was converted to the crude hydrochloride salt, which precipitated from i-PrOH/Et
2O as white rhomboids.
1H NMR (400 MHz, CDCl
3): δ 6.82 (d, J = 1.6 Hz, 1H, H4'), 6.78 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 6.72 (d, J = 7.9 Hz, 1H, H7'), 5.94 (m [AB], 2H, H2'), 4.49–4.35 (m, 2H), 4.06–3.92 (m, 2H), 3.68 (dd, J = 13.3, 3.3 Hz, 1H, H2a), 3.58–3.50 (m, 1H), 3.37–3.24 (m, 2H), 3.17–3.05 (m, 1H), 2.97 (dd, J = 13.3, 9.6 Hz, 1H, H2b), 2.58 (dddd [app. tt], J
1 = J
2 = 10.2 Hz, J
3 = J
4 = 3.4 Hz, 1H, H1), 1.05–0.94 (m, 1H), 0.82–0.72 (m, 1H), 0.62–0.52 (m, 1H), 0.48–0.39 (m, 1H), –0.14 to –0.23 (m, 1H). 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclopropyl-N-(oxan‐4‐yl)ethan-1-amine (UWA-046, JLK2103, "Compound 1T")
[00145] Following general procedure 1, ketone K1 (204 mg, 1.00 mmol) was reacted with 4-aminotetrahydropyran (570 μL, 10.0 mmol) and the crude product was subjected to flash chromatography. Elution with 3:7 EtOAc/Hex followed by 30:70:1 EtOAc/Hex/NEt
3 afforded the secondary amine 1T as a pale-yellow oil (240 mg, 83 %).
1H NMR (400 MHz, CDCl
3): δ 6.66 (d, J = 7.9 Hz, 1H, H7'), 6.63 (d, J = 1.6 Hz, 1H, H4'), 6.58 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.85 (s, 2H, H2'), 3.90–3.77 (m, 2H, H2''a/6''a), 3.36–3.21 (dddd [app. tdd], J = 15.5, 11.5, 11.5, 2.3 Hz, 2H, H2''b/6''b), 2.82–2.69 (m, 2H, H2a/4''), 2.63–2.53 (dd, J = 13.6, 7.4 Hz, 1H, H2b), 2.05 (ddd, J = 8.67.4, 5.2 Hz, 1H, H1), 1.81–1.73 (m, 1H, H3''a or H5''a), 1.72–1.64 (m, 1H, H3''a or H5''a), 1.28–1.15 (m, 1H, H3''b or H5''b), 1.13–1.00 (m, 1H, H3''b or H5''b), 0.69–0.57 (m, 1H, H1'''), 0.52–0.42 (m, 1H), 0.42–0.32 (m, 1H), 0.16–0.07 (m [app. sextet], 1H), 0.01 to –0.08 (m [app. sextet], 1H).
13C NMR (100 MHz, CDCl
3): δ 147.5 and 145.8 (C3a' and C7a'), 132.9 (C5'), 122.2 (C6'), 109.3 (C4'), 108.0 (C7'), 100.7 (C2'), 67.0 and 66.9 (C2'' and C6''), 60.3 (C1), 50.6 (C4''), 41.9 (C2), 34.7 and 33.9 (C3'' and C5''), 16.5 (C1'''), 4.5 and 2.4 (C2''' and C3'''). HRMS (ESI+) m/z [M + H]
+ calcd for C
17H
24NO
3 + 290.1751; found, 290.1749. [00146] The free base was converted to the hydrochloride salt, which precipitated from i- PrOH/Et
2O as white granules.
1H NMR (400 MHz, CDCl
3): δ 9.76 (br. s, 1H, NH), 9.65 (br. s,
1H, NH), 6.76–6.69 (m, 3H, H4'/6'/7'), 5.93 (m [AB], 2H, H2'), 4.08–3.96 (m, 2H, H2''a/6''a), 3.64–3.45 (m, 2H, H2a/4''), 3.38–3.24 (m, 2H, H2''b/6''b), 3.16 (dd, J = 13.4, 9.8 Hz, 1H, H2b), 2.65–2.53 (m, 1H, H1), 2.26–2.10 (m, 3H), 2.03–1.94 (m, 1H), 1.28–1.16 (m, 1H), 0.75–0.64 (m, 1H), 0.53–0.42 (m, 1H), 0.38–0.29 (m [app. sextet], 1H), –0.18 to –0.27 (m [app. sextet], 1H). 2-(Benzo[d][1,3]dioxol-5-yl)-1-cyclopropyl-N-(cyclopropylmethyl)ethanamine (UWA-050, GAP-045, “Compound 1U”)

Following general procedure 1, a sealed mixture of freshly activated 3A sieves (144 mg), ketone K1 (103 mg, 0.504 mmol), cyclopropylmethanamine hydrochloride (570 mg, 5.30 mmol), sodium acetate (433 mg, 5.28 mmol) and sodium cyanoborohydride (33 mg, 0.53 mmol) in anhydrous THF (2.5 mL) was stirred at 50 °C for 3 d. The reaction mixture was cooled to room temperature, quenched with 1 M HCl (10 mL) and vacuum filtered through a pad of Celite, washing through with MeOH (3 × 25 mL). The filtrate was concentrated under reduced pressure and the residue was basified with 1 M NaOH (30 mL) and extracted with CH
2Cl
2 (3 × 30 mL). The extract was washed with brine (30 mL), dried and evaporated, and the residue was subjected to flash chromatography. Elution with 1:1 EtOAc/hexanes then 1:49:50 NEt
3/EtOAc/hexanes afforded amine 1U as a colourless oil (89 mg, 68 %).
1H NMR (400 MHz, CDCl
3): δ 6.73 (d, J = 7.8 Hz, 1H), 6.70 (d, J = 1.5 Hz, 1H), 6.66 (dd, J = 7.8, 1.6 Hz, 1H), 5.93 (s, 2H), 2.81 (dd, J = 13.6, 5.3 Hz, 1H), 2.73–2.63 (m, 2H), 2.35 (dd, J = 11.8, 7.0 Hz, 1H), 1.89 (ddd, J = 9.0, 7.6, 5.3 Hz, 1H), 0.95–0.84 (m, 1H), 0.75–0.66 (m, 1H), 0.57–0.50 (m, 1H), 0.46– 0.37 (m, 3H), 0.20 (m [app. sextet], J = 5.0 Hz, 1H), 0.09–0.04 (m, 1H), 0.02–(–0.06) (m, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.6, 146.0, 133.3, 122.4, 109.8, 108.2, 100.9, 65.1, 53.2, 41.7, 16.2, 11.5, 4.8, 3.6, 3.4, 2.4 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
22NO
2 + 260.1645; found, 260.1642. [00147] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as colourless rosettes.
1H NMR (400 MHz, CDCl
3) δ 9.70 (br s, 1H), 9.57 (br s, 1H), 6.77–6.73 (m, 2H), 6.71 (d, J = 8.0 Hz, 1H), 5.93 (d [AB], J = 1.4 Hz, 1H), 5.92 (d [AB], J = 1.4 Hz, 1H), 3.55 (dd, J = 13.4, 4.1 Hz, 1H), 3.11 (dd, J = 13.4, 9.9 Hz, 1H), 2.99 (br d, J = 6.8 Hz, 2H), 2.64–2.55 (m, 1H), 1.38–1.28 (m, 1H), 1.17–1.06 (m, 1H), 0.69–0.61 (m, 3H), 0.54–0.42 (m, 4H), (–0.15)–(–0.23) (m, 1H) ppm.
Compounds of type 2 [00148] Compounds of type 2 may be synthesised via the following general procedure 2;
wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 2 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(1,3-Benzodioxol-5-yl)-1-cyclobutylethanone (“Ketone K2”)
[00149] Following a modified literature procedure
7, to a freshly prepared solution of piperonylcuprate in THF (150 mM, 180 mL) at −70 °C was slowly added a solution of cyclobutanecarbonyl chloride (3.07 g, 25.9 mmol) in THF (5 mL). The reaction mixture was allowed to warm to rt over 2.5 h then quenched by addition of 1 M HCl (40 mL). The mixture was diluted with Et
2O (100 mL) and water (200 mL) then filtered through a Celite pad. The aqueous layer was separated, shaken with further Et
2O (100 mL) and both phases passed through a Celite pad to remove the evolved precipitate. This process was repeated once further. The combined organic extract was washed with water until no more precipitate evolved and then washed with saturated NaHCO
3 solution (50 mL), brine (50 mL), dried and evaporated to afford a pale yellow oil. The crude material was purified using flash chromatography (1:10 Et
2O/hexanes) which gave the product as a pale yellow oil (2.79 g, 48%). IR (thin film) ν¯ max (cm
-1): 1709 (s, C−O).
1H NMR (500 MHz, CDCl
3): δ 6.74 (d, J = 8.0 Hz, 1H, H7'), 6.67 (d, J = 1.5 Hz, 1H, H4'), 6.62 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.93 (s, 2H, H2'), 3.55–3.53 (m, 2H, H2), 3.33 (dtt [app doublet of quintets], J = 8.5, 8.5, 1.0 Hz, 1H, H1''), 2.27–2.17 (m, 2H), 2.11-2.02
(m, 2H), 1.98–1.87 (m, 1H), 1.84–1.75 (m, 1H).
13C NMR (125 MHz, CDCl
3): δ 209.2 (C1), 147.8 and 146.5 (C3a' and C7a'), 127.9 (C5'), 122.5 (C6'), 109.8 and 108.3 (C4' and C7'), 101.0 (C2'), 47.1 (C1), 44.6 (C1''), 24.5 (C2'' and C4''), 17.6 (C3''). HRMS–EI (m/z): M
+ calcd for C
13H
14O
3, 218.0943; found, 218.0948. 2-(benzo[d][1,3]dioxol-5-yl)-1-cyclobutylethan-1-amine (UWA-045, JLK2097, “Compound 2A”)
[00150] Compound 2A may be obtained via the following adaptation of the procedure for the preparation of compound 1A using ketone K2 instead of ketone K1. [00151] To freshly activated 3 Å sieves (ca 150 mg) was added a solution of the ketone K2 (218 mg, 1.00 mmol) in anhydrous THF (2 mL), ammonium acetate (771 mg, 10.0 mmol) and sodium cyanoborohydride (63 mg, 1.00 mmol). The mixture was stirred stoppered at 50 °C for 16 h. The reaction was quenched with conc. HCl, filtered through a pad of Celite with H
2O, basified and extracted with DCM (3 × 50 mL). The extract was washed with H
2O (2 × 50 mL) and brine (50 mL), dried and evaporated, and the residue was subjected to flash chromatography. Elution with 40:60:1 EtOAc/Hex/AcOH followed by 60:40:1 EtOAc/Hex/NEt
3 gave the primary amine 2A as a pale-yellow oil (87 mg, 40 %).
1H NMR (400 MHz, CDCl
3): δ 6.74 (d, J = 7.9 Hz, 1H, H7'), 6.68 (d, J = 1.6 Hz, 1H, H4'), 6.63 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.92 (s, 2H, H2'), 2.82 (ddd [app. td], J1 = J2 = 8.8, J3 = 3.9 Hz, 1H, H1), 2.68 (dd, J = 13.5, 3.9 Hz, 1H, H2a), 2.25–2.17 (m, 2H), 2.10-1.68 (m, 6H), 0.97 (br. s, 2H, NH
2).
13C NMR (100 MHz, CDCl
3): δ 147.7 and 146.0 (C3a' and C7a'), 133.5 (C5'), 122.3 (C6'), 109.7 (C4'), 108.3 (C7'), 100.9 (C2'), 58.6 (C1), 42.1 (C1''), 41.1 (C2), 25.7, 25.6, 17.8 (C2'', C3'' and C4''). HRMS (ESI+) m/z [M + H]
+ calcd for C
13H
18NO
2 + 220.1332; found, 220.1330. [00152] The free base was converted to the crude hydrochloride, which crystallised from DCM/Hex as colourless rhomboids.
1H NMR (400 MHz, CDCl
3): δ 8.37 (br. s, 3H, NH3), 6.76 (d, J = 1.3 Hz, 1H, H7'), 6.73 (d, J = 7.9 Hz, 1H, H4'), 6.69 (dd, J = 7.9, 1.3 Hz, 1H, H6'), 5.91 (s, 2H, H2'), 3.42–3.26 (m, 1H, H1), 3.05 (dd, J = 14.0, 5.7 Hz, 1H, H2a), 2.79 (dd, J = 14.0, 7.9 Hz, 1H, H2b), 2.66–2.52 (m, 1H), 2.22–2.02 (m, 2H), 1.93–1.71 (m, 4H). 2-(1,3-Benzodioxol-5-yl)-1-cyclobutyl-N-methylethanamine (UWA-038, MNG6050, “Compound 2B”)
[00153] Following the general procedure 2, reaction of the ketone K2 (221 mg, 1.02 mmol) with 8.03 M methylamine in EtOH (1.25 ml, 10.0 mmol) and elution with 2:3 EtOAc/hexanes followed by 1:9 MeOH/EtOAc afforded the product as a pale yellow oil (159 mg, 67%).
1H NMR (500 MHz, CDCl
3): δ 6.72 (d, J = 8.0 Hz, 1H, H7’), 6.67 (d, J = 1.5 Hz, 1H, H4’), 6.61 (dd, J = 8.0, 1.5 Hz,
1H, H6’), 5.93–5.91 (m, 2H, H2’), 2.62 (dd, J = 13.5, 4.5 Hz, 1H, H2a), 2.54 (ddd, J = 9.0, 7.5,
4.5 Hz, 1H, H1), 2.41 (dd, J = 14.0, 7.5 Hz, 1H, H2b), 2.36 (s, 3H, NCH
3), 2.34–2.22 (m, 1H), 2.10–1.68 (m, 6H).
13C NMR (125 MHz, CDCl
3): δ 147.5 and 145.8 (C3a’ and C7a’), 133.2 (C5’), 122.2 (C6’), 109.6 and 108.1 (C4’ and C7’), 100.7 (C2’), 66.4 (C1), 40.2 and 34.5 (NCH
3 and C1’’), 36.9 (C2), 27.2, 26.3, 18.2 (C2’’, C3’’, C4’’). HRMS–ESI (m/z): [M+H]
+ calcd for C
14H
19NO
2, 234.1494; found, 234.1486. [00154] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as a colourless amorphous powder (mp 165–166 °C).
1H NMR (500 MHz, CDCl
3): δ 9.5–9.1 (2×br s, 2H, NH
2), 6.78–6.73 (m, 3H, H4’+H6’+H7’), 5.94–5.93 (m [AB system], 2H, H2’), 3.23–3
.15 (br m, 1H), 3.12 (dd, J = 14.0, 6.5 Hz, 1H, H2a), 2.83 (dd, J = 14.0, 7.0 Hz, 1H, H2b ), 2.78–2.68 (m, 1H), 2.59–2.54 (m [app br t], 3H, NCH
3), 2.29–2.21 (m, 1H), 2.14–2.04 (m, 1H), 1.93–1.82 (m, 2H), 1.81–1.66 (m, 2H). Anal. Calcd for C
14H
20ClNO
2: C, 62.33; H, 7.47; N, 5.19. Found: C, 62.35; H, 7.59; N, 5.15. 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclobutyl-N,N-dimethylethan-1-amine (UWA-016, JLK2094, GAP-070, “Compound 2C”)
[00155] To freshly activated 3 Å sieves (ca 150 mg) was added a solution of the ketone K2 (109 mg, 0.50 mmol) in anhydrous THF (2 Ml), dimethylamine hydrochloride (408 mg, 5.00 mmol), sodium acetate (411 mg, 5.01 mmol) and sodium cyanoborohydride (32 mg, 0.51 mmol). The mixture was stirred stoppered at 50 °C for 16 h. The reaction was quenched with conc. HCl, filtered through a pad of Celite with H
2O, basified and extracted with DCM (3 × 50 Ml). The extract was washed with H
2O (2 × 50 Ml) and brine (50 Ml), dried and evaporated, and the residue was subjected to flash chromatography. Elution with 40:60:1 EtOAc/Hex/AcOH then 40:60:1 EtOAc/Hex/Net
3 gave the tertiary amine 2C as a yellow oil (87 mg, 71 %).
1H NMR (400 MHz, CDCl
3): δ 6.71–6.66 (m, 2H, H4’/7’), 6.62 (dd, J = 7.9, 1.3 Hz, H6’), 5.90 (s, 2H, H2’),
2.69–2.60 (m, 2H, H1/2a), 2.52–2.40 (m, 1H, H1’’), 2.37–2.30 (m, 1H, H2b), 2.27 (s, 6H, 2 × CH
3), 2.05–1.94 (m, 1H), 1.89–1.60 (m, 4H), 1.55–1.43 (m, 1H).
13C NMR (100 MHz, CDCl
3): δ 147.4 and 145.5 (C3a’ and C7a’), 135.4 (C5’), 122.0 (C6’), 109.6 (C4’), 108.0 (C7’), 100.8 (C2’), 71.7 (C1), 41.2 (CH
3), 39.1 (C1’’), 33.3 (C2), 28.6 and 28.4 (C2’’ and C4’’), 18.8 (C3’’). HRMS (ESI+) m/z [M + H]
+ calcd for C
15H
22NO
2 + 248.1645; found, 248.1643. [00156] The free base was converted to the hydrochloride salt and evaporated to leave a pale brown gum.
1H NMR (400 MHz, CDCl
3): δ 11.85 (br. S, 1H, NH), 6.78–6.71 (m, 3H, H4’/6’/7’), 5.94 (s, 2H, H2’), 3.47–3.36 (m, 1H, H1), 3.15 (dd, J = 14.6, 4.8 Hz, 1H, H2a), 2.78 (dd, J = 14.6, 7.1 Hz, 1H, H2b), 2.72 (d, J = 4.4 Hz, 3H, CH
3), 2.68 (d, J = 4.4 Hz, 3H, CH
3), 2.23–2.07 (m, 2H), 1.98–1.79 (m, 3H), 1.78–1.61 (m, 2H). 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclobutylethyl-N-cyclopropanamine; N-(2- (benzo[d][1,3]dioxol-5-yl)-1-cyclobutylethyl)cyclopropanamine; (UWA-054, JLK2045, “Compound 2D”)
[00157] Following general procedure 2, ketone K2 (220 mg, 1.01 mmol) was reacted with cyclopropylamine (572 Ml, 10.0 mmol). The reaction was quenched with conc. HCl and filtered through a pad of Celite with H
2O. The solution was washed with DCM (3 × 50 Ml), then basified and extracted with EtOAc (3 × 30 Ml). The organic extracts were combined and washed with H
2O (2 × 30 Ml) and brine (30 Ml), then dried and evaporated to give the secondary amine 2D as a pale brown oil (233 mg, 90 %).
1H NMR (400 MHz, CDCl
3): δ 6.73 (d, J = 8.0 Hz, 1H, H7’), 6.69 (d, J = 1.4 Hz, 1H, H4’), 6.62 (dd, J = 7.9, 1.5 Hz, 1H, H6’), 5.93 (s, 2H, H2’), 2.77–2.71 (m, 1H, H1), 2.64 (dd, J = 13.7, 4.7 Hz, 1H, H2a), 2.48 (dd, J = 13.7, 7.6 Hz, 1H, H2b), 2.34–2.24 (m, 1H, H1’’), 2.08–1.99 (m, 2H), 1.94–1.86 (m, 1H), 1.86–1.78 (m, 2H), 1.76–1.66 (m, 2H), 0.42–0.38 (m, 2H, H2’’ or H3’’), 0.25–0.21 (m, 2H, H2’’ or H3’’).
13C NMR (100 MHz, CDCl
3): δ 147.6 and 145.9 (C3a’’ and C7a’’), 133.6 (C5’), 122.4 (C6’), 109.8 (C4’), 108.2 (C7’), 100.9 (C2’), 65.4 (C1), 40.6 (C1’’), 38.1 (C2), 29.3 (C1’’’), 27.3 and 26.3 (C2’’’ and C4’’’), 18.2 (C3’’’), 7.4 and 7.1 (C2’’ and C3’’). HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
22NO
2 + 260.1645; found, 260.1643. [00158] The free base was converted to the hydrochloride salt, which crystallised from i- PrOH/Et
2O as white rosettes.
1H NMR (400 MHz, CDCl
3): δ 6.81–6.75 (m, 2H, H4’/H6’), 6.75– 6.70 (m, 1H, H7’), 5.93 (s, 2H, H2’), 3.38–3.25 (m, 2H, H1/2a), 2.92–2.75 (m, 2H, 1’’/H2b),
2.37–2.22 (m, 2H), 2.13–2.01 (m, 1H), 1.92–1.79 (m, 2H), 1.77–1.58 (m, 2H), 1.36–1.17 (m, 2H), 0.80–0.70 (m, 2H). 2‐(1,3‐Benzodioxol‐5‐yl)‐1‐cyclobutylethyl-N-cyclobutanamine; N-(2-(benzo[d][1,3]dioxol- 5-yl)-1-cyclobutylethyl)cyclobutanamine; (UWA-056, JLK2044, “Compound 2E”)
[00159] Following general procedure 2 but using half the excess of amine, ketone K2 (111 mg, 0.51 mmol) was reacted with cyclobutylamine (213 Ml, 2.50 mmol). The reaction was quenched with conc. HCl and filtered through a pad of Celite with H
2O. The solution was washed with DCM (3 × 50 Ml), then basified and extracted with EtOAc (3 × 20 Ml). The organic extracts were combined and washed with H
2O (2 × 20 Ml) and brine (20 Ml), then dried and evaporated to give the secondary amine 2E as a pale brown oil (109 mg, 80 %).
1H NMR (400 MHz, CDCl
3): δ 6.72 (d, J = 7.9 Hz, 1H, H7’), 6.67 (d, J = 1.1 Hz, 1H, H4’), 6.61 (dd, J = 7.9, 1.1 Hz, 1H, H6’), 5.93 (s, 2H, H2’), 3.30–3.20 (m, 1H, H1’’), 2.64–2.54 (m, 2H, H1/H2a), 2.39–2.30 (m, 1H, H2b), 2.29–2.20 (m, 1H, H1’’’), 2.20–2.10 (m, 2H, H2’’ or H4’’), 2.09–1.98 (m, 1H), 1.93–1.64 (m, 5H), 1.61–1.34 (m, 4H).
13C NMR (100 MHz, CDCl
3): δ 147.6 and 145.9 (C3a’ and C7a’), 133.6 (C5’), 122.3 (C6’), 109.7 (C4’), 108.2 (C7’), 100.9 (C2’), 62.0 (C1), 52.1 (C1’’), 40.9 (C1’’’), 38.4 (C2), 32.03 and 31.95 (C2’’ and C4’’), 27.2 and 26.3 (C2’’’ and C4’’’), 18.2 (C3’’’), 14.6 (C3’’). HRMS (ESI+) m/z [M + H]
+ calcd for C
17H
24NO
2 + 274.1802; found, 274.1799. [00160] The product was converted to the hydrochloride salt, which precipitated from i- PrOH/Et
2O as white granules.
1H NMR (400 MHz, CDCl
3): δ 9.40 (br. S, 1H, NH), 9.35 (br. S, 1H, NH), 6.79 (dd, J = 7.9, 1.5 Hz, 1H, H6’), 6.77 (d, J = 1.4 Hz, 1H, H4’), 6.74 (d, J = 7.9 Hz, 1H, H7’), 5.95 (m [AB], 2H, H2’), 3.61–3.48 (m, 1H, H1’’), 3.25 (dd, J = 14.5, 6.2 Hz, 1H, H2a), 3.16–3.05 (m, 1H, H1), 2.87–2.71 (m, 2H, H1’’’/2b), 2.70–2.57 (m, 1H), 2.56–2.43 (m, 1H), 2.41–2.30 (m, 1H), 2.27–2.16 (m, 2H), 2.07–1.79 (m, 4H), 1.79–1.56 (m, 3H). Compounds of type 3 [00161] Compounds of type 3 may be synthesised via the following general procedure 3;
wherein R
1 and R
2 are as defined for the compound of Formula II’. 1-(1,3-Benzodioxol-5-yl)but-3-yn-2-ol (“Propargyl alcohol P1”)
[00162] Propargyl alcohol P1 is a known compound previously synthesised by other methods.
8 Following an adapted literature procedure
7, to a stirring solution of 0.5 M ethynylmagnesium chloride in THF (41 Ml, 20 mmol) at 0 °C was added dropwise a solution of freshly prepared homopiperonal
9 (57, 3.34 g, 20.3 mmol) in THF (100 Ml) over 45 min. The resulting solution was stirred at 0 °C for 0.5 h then allowed to warm to rt. The mixture was quenched with saturated NH
4Cl solution (50 Ml) then stirred for a further 5 min. The aqueous layer was separated and extracted with further Et
2O (3×50 Ml). The combined organic extract was washed with water (2×100 Ml), brine (50 Ml), dried and evaporated which gave a crude orange oil. This material was adsorbed onto silica gel and purified by flash chromatography (1:9 EtOAc/hexanes followed by 1:4 EtOAc/hexanes) to afford a yellow oil (2.96 g, 76%). The characterisation data was consistent with that found in the literature.
8 1-(1,3-Benzodioxol-5-yl)but-3-yn-2-yl 4-methylbenzenesulfonate (“Propargyl tosylate P2”)
[00163] Following an adapted literature procedure
10 , to a stirred solution of the propargyl alcohol P1 (2.96 g, 15.6 mmol), Net
3 (4.35 Ml, 31.2 mmol), 4-(dimethylamino)pyridine (95 mg, 0.78 mmol) in anhydrous CH
2Cl
2 (50 Ml) at 0 °C was added tosyl chloride (3.06 g, 16.1 mmol). The reaction mixture was stirred at rt under a CaCl
2 guard tube for 1 h. The reaction mixture was washed with 1 M HCl (2×20 Ml), saturated NaHCO
3 solution (10 Ml), water (10 Ml), brine (10 Ml), dried and evaporated to give a white solid, which discoloured pink upon standing overnight. The crude material was triturated with hexanes. The liquid was separated and allowed to cool affording the desired product as white crystals (4.07 g, 76%). A sample was recrystallised from CH
2Cl
2/hexanes as a white amorphous solid: mp 71–72 °C. IR (dry film) ν¯
max (cm
-1): 3290 (s, C≡C–H), 2125 (w, C≡CH), 1363 (vs, SO
2), 1176 (vs, SO
2).
1H NMR (400 MHz, CDCl
3): δ 7.71–7.66 (m, 2H, H2’’ and H6’’), 7.28–7.23 (m, 2H, H3’’ and H5’’), 6.69–6.66 (m, 1H), 6.63–6.59 (m, 2H), 5.93–5.91 (m [AB system], 2H, H2’), 5.10 (ddd [app dt], J = 6.8,
6.8, 2.2 Hz, 1H, H2), 3.03 (dd, J = 14.0, 7.0 Hz, 1H, H1a), 2.99 (dd, J = 14.0, 6.6 Hz, 1H, H1b), 2.47 (d, J = 2.2 Hz, 1H, H4), 2.42 (s, 3H, ArCH
3 ).
13C NMR (100 MHz, CDCl
3 ): δ 147.5, 146.8, 144.8(C3a’, C7a’, C1’’), 133.5 (C5’), 129.6 (C3’’+C5’’), 128.1 (C4’’), 128.0 (C2’’+C6’’), 123.0 (C6’), 110.0 and 108.2 (C4’ and C7’), 101.0 (C2’), 78.7 (C3), 76.9 (C4), 71.4 (C2), 41.7 (C1), 21.6 (CH
3). HRMS–EI (m/z): M
+ calcd for C
18H
16O
5S, 344.0718; found, 344.0720. Anal. Calcd for C
18H
16O
5S: C, 62.78; H, 4.68; N, 0.00. Found: C, 62.67; H, 4.60; N, 0.02. General method for the final step of general procedure 3
[00164] The propargyl tosylate P2 (0.90–1.00 mmol) is dissolved in the appropriate amine (3–20 eq.) and stirred overnight under N
2 at rt. The reaction is poured onto 1M NaOH (20 Ml) and extracted with EtOAc (3×20 Ml). The combined organic extract is dried, evaporated and purified by RSF chromatography to afford the desired product. 1-(1,3-Benzodioxol-5-yl)-N-methylbut-3-yn-2-amine (UWA-017, MNG016, “Compound 3A”)
[00165] To a solution of the propargyl tosylate P2 (517 mg, 1.50 mmol) in dry THF (10 mL) was added a solution of 8.03 M methylamine in EtOH (3.74 mL, 30.0 mmol) and the solution was stirred overnight under N
2 at rt. The following day TLC analysis revealed that only partial conversion had been effected so the reaction was heated at reflux for 3 h. The reaction was worked up and purified as per the general procedure 3. Elution with 2:3 EtOAc/hexanes followed by EtOAc gave the desired amine as a yellow oil (213 mg, 70%). IR (thin film) ν¯ max (cm
-1): 3289 (s, C≡C–H).
1H NMR (500 MHz, CDCl
3): δ 6.79 (d, J = 1.5 Hz, 1H, H4'), 6.74 (d, J = 8.0 Hz, 1H, H7'), 6.72 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.93 (s, 2H, H2'), 3.50 (ddd [app dt], J = 6.5, 6.5, 2.0 Hz, 1H, H2), 2.91–2.82 (m [AB part of ABX system], 2H, H1a+H1b), 2.48 (s, 3H, NCH
3), 2.31 (d, J = 2.5 Hz, 2H, H4).
13C NMR (125 MHz, CDCl
3): δ 147.4 and 146.3 (C3a' and C7a'), 131.1 (C5'), 122.6 (C6'), 109.9 and 108.1 (C4' and C7'), 100.8 (C2'), 84.4 (C3), 72.5 (C4), 53.0 (C2), 41.4 (C1), 33.9 (NCH
3). HRMS–ESI (m/z): [M+H]
+calcd for C
12H
12NO
2, 204.1025; found, 204.1021.
[00166] The free base was converted to the crude hydrochloride and was recrystallised from 2-propanol as a colourless amorphous powder (mp 184–189 °C).
1H NMR (500 MHz, D2O): δ 6.93 (d, J = 1.5 Hz, 1H, H4'), 6.90 (d, J = 7.5 Hz, 1H, H7'), 6.87 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.98 (s, 2H, H2'), 4.33 (ddd, J = 8.5, 6.0, 2.0 Hz, 1H, H2), 3.17 (dd, J = 14.0, 6.0 Hz, 1H, H1a), 3.15–3.08 (m [app dd+d], 2H, H1b +H4), 2.83 (s, 3H, NCH3). Anal. Calcd for C
12H
14ClNO
2: C, 60.13; H, 5.89; N, 5.84. Found: C, 60.01; H, 5.75; N, 5.69. 1-(1,3-Benzodioxol-5-yl)-N-ethylbut-3-yn-2-amine (UWA-024, MNG5130, “Compound 3B”)
[00167] The propargyl tosylate P2 (344 mg, 1.00 mmol) was dissolved in a solution of 2.0 M ethylamine in MeOH (10.0 mL, 20.0 mmol) and the solution was stirred under N
2 at rt for 7 d. The reaction was worked up as per the general procedure 3 using 2:3 EtOAc/hexanes followed by EtOAc for chromatography to give the desired amine as a yellow oil (174 mg, 80%). IR (thin film) ν¯ max (cm
-1): 3290 (s, C≡C–H).
1H NMR (500 MHz, CDCl
3): δ 6.80 (d, J = 2.0 Hz, 1H, H4'), 6.75 (d, J = 8.0 Hz, 1H, H7'), 6.73 (dd, J = 8.0, 2.0 Hz, 1H, H6'), 5.95–5.93 (m, 2H, H2'), 2.39 (ddd, J = 7.0, 6.0, 2.0 Hz, 1H, H2), 2.95–2.88 (m, 2H, H1a+H1a''), 2.84 (dd, J = 13.5, 7.0 Hz, 1H, H1b), 2.62 (dq, J = 11.5, 7.0 Hz, 1H, H1b ''), 2.29 (d, J = 2.5 Hz, 1H, H4), 1.10 (t, J = 7.5 Hz, 3H, H2'').
13C NMR (125 MHz, CDCl
3): δ 147.5 and 146.3 (C3a' and C7a'), 131.2 (C5'), 122.6 (C6'), 109.9 and 108.1 (C4' and C7'), 100.9 (C2'), 84.8 (C3), 72.3 (C4), 51.2 (C2), 41.63 and 41.60 (C1 and C1''), 15.0 (C2''). HRMS–EI (m/z): M
+ calcd for C
13H
15NO
2, 217.1103; found, 217.1098. [00168] The free base was converted to the crude hydrochloride and was recrystallised from 2-propanol as a colourless amorphous powder (mp 203–206 °C).
1H NMR (500 MHz, CDCl
3): δ 10.1 (br s, 2H, NH2 ), 6.83 (d, J = 1.5 Hz, 1H, H4'), 6.80 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 6.73 (d, J = 8.0 Hz, 1H, H7'), 5.94–5.92 (m [AB system], 2H, H2'), 4.02–3.97 (m [app dq], 1H, H2), 3.59 (dd, J = 8.0, 3.5 Hz, 1H, H1a), 3.38 (dq, J = 12.5, 7.0 Hz, 1H, H1a''), 3.23–3.0 (m, 2H, H1b +H1b ''), 2.59 (d, J = 1.5 Hz, 1H, H4), 1.52 (t, J = 7.0 Hz, 3H, H2''). Anal. Calcd for C
13H
16ClNO
2: C, 61.54; H, 6.36; N, 5.52. Found: C, 61.40; H, 6.61; N, 5.44. 1-(1,3-Benzodioxol-5-yl)-N-(propan-2-yl)but-3-yn-2-amine (UWA-026, MNG5136, “Compound 3C”)
[00169] Following the general procedure 3, reaction of the propargyl tosylate P2 (343 mg, 1.00 mmol) with isopropylamine (1.64 mL, 19.3 mmol) and elution with 1:19 EtOAc/hexanes followed by 1:5 EtOAc/hexanes afforded the product as a dark tan oil (197 mg, 86%). IR (thin film) ν¯ max (cm
-1): 3290 (s, C≡C–H).
1H NMR (500 MHz, CDCl
3): δ 6.83–6.81 (m, 1H), 6.77–6.72 (m, 2H), 5.95–5.92 (m, 2H, H2'), 3.67 (ddd, J = 8.0, 5.5, 2.0 Hz, 1H, H2), 3.16 (septet, J = 6.0 Hz, 1H, H2''), 2.93 (dd, J = 13.5, 5.5 Hz, 1H, H1a), 2.81 (dd, J = 13.5, 8.0 Hz, 1H, H1b ), 2.29 (d, J = 2.0 Hz, 1H, H4), 1.97 (br s, NH+H
2O), 1.10 (d, J = 6.5 Hz, 3H, H1''), 1.01 (d, J = 6.0 Hz, 3H, H3'').
13C NMR (125 MHz, CDCl
3): δ 147.4 and 146.4 (C3a' and C7a'), 130.9 (C5'), 122.7 (C6'), 110.0 and 108.1 (C4' and C7'), 100.9 (C2'), 84.2 (C3), 72.8 (C4), 48.7 and 46.2 (C2 and C2''), 41.6 (C1), 23.7 and 21.2 (C1'' and C3''). HRMS–EI (m/z): M
+ calcd for C
14H17NO
2, 231.1259; found, 231.1264. [00170] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as a colourless amorphous powder (mp 197–199 °C).
1H NMR (500 MHz, CDCl
3): δ 10.22 (br s, 1H, NHa), 9.81 (br s, 1H, NHb), 6.84 (d, J = 1.5 Hz, 1H, H4'), 6.80 (dd, J = 8.0, 2.0 Hz, 1H, H6'), 6.73 (d, J = 7.5 Hz, 1H, H7'), 5.94–5.92 (m [AB system], 2H, C2'), 4.05–3.98 (m, 1H, H2), 3.81–3.71 (m, 1H, H2''), 3.66 (dd, J = 12.5, 3.5 Hz, 1H, H1
a), 3.33 (dd [app t], J = 12.0, 12.0 Hz, 1H, H1
b), 2.57 (d, J = 2.0 Hz, 1H, H4), 1.64 (d, J = 6.5 Hz, 3H, H1''), 1.43 (d, J = 6.5 Hz, 3H, H3''). Anal. Calcd for C
14H
18ClNO
2: C, 62.80; H, 6.78; N, 5.23. Found: C, 62.62; H, 7.00; N, 5.17. 1-(1,3-Benzodioxol-5-yl)-N-propylbut-3-yn-2-amine (UWA-025, MNG5134, “Compound 3D”)
[00171] Following the general procedure 3, reaction of the propargyl tosylate P2 (344 mg, 1.00 mmol) with n-propylamine (1.64 Ml, 19.9 mmol) and elution with 2:3 EtOAc/hexanes afforded the product as a dark tan oil (181 mg, 85%). IR (thin film) ν¯
max (cm
-1): 3292 (s, C≡C–H).
1 H NMR (600 MHz, CDCl
3 ): δ 6.79 (d, J = 1.8 Hz, 1H, H4’), 6.74 (d, J = 7.8 Hz, 1H, H7’), 6.71 (dd, J = 7.8, 1.8 Hz, 1H, H6’), 5.92 (s, 2H, H2’), 3.58–3.54 (m, 1H, H2), 2.81 (dd, J = 13.2, 6.0 Hz, 1H, H1a), 2.85–2.77 (m [app dd+ddd], 2H,
H1b and H1a’’), 2.55 (ddd, J = 10.8, 8.4, 6.0 Hz, 1H, H1b ‘’), 2.29 (d, J = 2.4 Hz,
1H, H4), 1.55–1.35 (m, 3H, H2’’+NH+H
2O), 0.89 (t, J = 7.2 Hz, 3H, H3’’).13C NMR (150 MHz, CDCl
3): δ 147.4 and 146.3 (C3a’ and C7a’), 131.2 (C5’), 122.6 (C6’), 109.9 and 108.0 (C4’ and C7’), 100.8 (C2’), 84.2 (C3), 72.2 (C4), 51.3 (C2), 49.2 and 41.5 (C1 and C1’’), 23.0 (C2’’), 11.7 (C3’’). HRMS–ESI (m/z): [M+H]
+ calcd for C
14H
17NO
2 , 232.1338; found, 232.1334. [00172] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol/Et
2O as a colourless amorphous powder (mp 171–173 °C).
1H NMR (500 MHz, CDCl
3): δ 10.05 (br s, 2H, NH
2), 6.83 (d, J = 1.5 Hz, 1H, H4’), 6.80 (dd, J = 8.0, 2.0 Hz, 1H, H6’), 6.73 (d, J = 8.0 Hz, 1H, H7’), 5.94–5.92 (m [AB system], 2H, H2’), 4.02 (ddd, J = 11.0, 3.5, 2.0 Hz, 1H, H2), 3.61 (dd, J = 13.0, 3.5 Hz, 1H, H1a), 3.24–3.14 (m [app ddd+dd], 2H, H1b+H1a’’), 3.03 (ddd, J = 12.0, 9.0, 7.0 Hz, 1H, H1
b’’), 2.59 (d, J = 2.5 Hz, 1H, H4), 2.04–1.93 (m, 2H, H2’’), 1.03 (t, J = 7.5 Hz, 1H, H3’’). Anal. Calcd for C
14H18ClNO
2: C, 62.80; H, 6.78; N, 5.23. Found: C, 62.83; H, 6.95; N, 5.15. 1-(1,3-Benzodioxol-5-yl)-N-(prop-2-en-1-yl)but-3-yn-2-amine (UWA-028, “Compound 3E”)
[00173] Following the general procedure 3, reaction of the propargyl tosylate P2 (310 mg, 0.90 mmol) with allylamine (675 µL, 9.00 mmol) and elution with 1:5 EtOAc/hexanes followed by 2:3 EtOAc/hexanes afforded the product as a pale yellow oil (174 mg, 84%). IR (thin film) ν¯
max (cm
-1): 3292 (s, C≡C–H) 1643 (w, HC−CH
2).
1H NMR (500 MHz, CDCl3): δ 6.80 (d, J = 1.5 Hz, 1H, H4'), 6.75 (d, J = 8.0 Hz, 1H, H7'), 6.73 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.94–5.92 (m, 2H, H2'), 5.87 (dddd, J = 17.0, 10.5, 6.5, 5.5 Hz, 1H, H2''), 5.18 (dddd, J = 17.0, 1.5, 1.5, 1.5 Hz, 1H, H3a''), 5.08 (dddd, J = 10.5, 1.5, 1.5, 1.5 Hz, 1H, H3b''), 3.60 (ddd, J = 7.0, 6.0, 2.0 Hz, 1H, H2), 3.47 (dddd, J = 14.0, 5.5, 1.5, 1.5 Hz, 1H, H1a''), 3.26 (dddd, J = 14.0, 6.5, 1.5, 1.5 Hz, 1H, H1b''), 2.90 (dd, J = 13.5, 6.0 Hz, 1H, H1a), 2.85 (dd, J = 13.5, 7.0 Hz, 1H, H1b), 2.31 (d, J = 2.5 Hz, 1H, H4),
1.6 (br s, NH+H2
O). 13C NMR
(125 MHz, CDCl
3): δ 147.5 and 146.3 (C3a' and C7a'), 136.1 (C2''), 131.0 (C5'), 122.6 (C6'), 116.4 (C3''), 109.9 and 108.1 (C4' and C7'), 100.8 (C2'), 84.5 (C3), 72.6 (C4), 50.5 (C2), 49.8 and 41.6 (C1 and C1''). HRMS–EI (m/z): M
+ calcd for C
14H
15NO
2, 229.1103; found, 229.1104. [00174] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as colourless rods (mp 183–185 °C).
1H NMR (500 MHz, CDCl
3): δ 10.3 (br s, 2H, NH
2), 6.83 (d, J = 2.0 Hz, 1H, H4'), 6.79 (dd, J = 8.0, 2.0 Hz, 1H, H6'), 6.74 (d, J = 8.0 Hz, 1H, H7'), 6.14 (dddd, J = 17.0, 10.0, 8.5, 6.0 Hz, 1H, H2''), 5.94–5.92 (m [AB system], 2H, H2'), 5.59–5.54 (m, 1H, H3a''), 5.49–5.45 (m,
1H, H3b''), 3.99 (ddd, J = 11.0, 4.0, 2.0 Hz, 1H, H2), 3.95–3.89 (m [app dd], 1H, H1a''), 3.72 (dd, J = 13.5, 8.5 Hz, 1H, H1b''), 3.56 (dd, J = 13.0, 4.0 Hz, 1H, H1a), 3.21 (dd, J = 13.0, 11.0 Hz, 1H, H1b), 2.62 (d, J = 2.0 Hz, 1H, H4). Anal. Calcd for C
14H
16ClNO
2: C, 63.28; H, 6.07; N, 5.27. Found: C, 63.21; H, 6.30; N, 5.23. 1-(1,3-Benzodioxol-5-yl)-N-(prop-2-yn-1-yl)but-3-yn-2-amine (UWA-029, MNG5152, “Compound 3F”)
[00175] Following the general procedure 3, reaction of the propargyl tosylate P2 (220 mg, 0.658 mmol) with propargylamine (421 µL, 0.657 mmol) and elution with 1:5 EtOAc/hexanes afforded the product as a pale yellow oil (118 mg, 79%). IR (thin film) ν¯
max (cm-1): 3288 (s, C≡C–H).1
H NMR (500 MHz, CDCl
3): δ 6.80 (d, J = 1.5 Hz, 1H, H4'), 6.75 (d, J = 8.0 Hz, 1H, H7'), 6.73 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.94 (s, 2H, H2'), 3.81 (ddd [app dt], J = 7.0, 7.0, 2.0 Hz, 1H, H2), 3.60 (dd, J = 17.0, 2.5 Hz, 1H, H1a''), 3.53 (dd, J = 16.5, 2.0 Hz, 1H, H1
b''), 2.94–2.86 (m [AB part of ABX system], 2H, H1a+H1b), 2.32 (d, J = 2.0 Hz, 1H, H4), 2.21(dd [app t], J = 2.5, 2.5 Hz, 1H, H3'').
13C NMR (125 MHz, CDCl
3): δ 147.6 and 146.5 (C3a' and C7a'), 130.6 (C5'), 122.6 (C6'), 109.8 and 108.2 (C4' and C7'), 100.9 (C2'), 83.5 and 81.3 (C3 and C2''), 73.0 and 71.7 (C4 and C3''), 49.8 (C2), 41.3 and 36.0 (C1 and C1''). HRMS–ESI (m/z): [M+H]
+ calcd for C
14H
13NO
2, 228.1025; found, 228.1029. [00176] The free base was converted to the crude hydrochloride and was recrystallised from 2-propanol as colourless needles (mp 190–191 °C).
1H NMR (500 MHz, D2O): δ 6.95 (d, J = 1.0 Hz, 1H, H4'), 6.92 (d, J = 7.5 Hz, 1H, H7'), 6.88 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 6.00 (s, 2H, H2'), 4.53 (ddd, J = 8.0, 6.0, 2.5 Hz, 1H, H2), 4.15 (dd, J = 16.5, 2.5 Hz, 1H, H1a''), 4.08 (dd, J = 16.5, 2.5 Hz, 1H, H1b''), 3.22 (dd, J = 14.0, 6.0 Hz, 1H, H1a), 3.18–3.11 (m [app d+dd], 2H, H4+H1b''), 3.03 (t, J = 2.5 Hz, 1H, H3''). Anal. Calcd for C
14H
14ClNO
2 : C, 63.76; H, 5.35; N, 5.31. Found: C, 63.83; H, 5.56; N, 5.22. 1-(1,3-Benzodioxol-5-yl)-N-butylbut-3-yn-2-amine (UWA-027, MNG5146, “Compound 3G”)
[00177] Following the general procedure 3, reaction of the propargyl tosylate P2 (310 mg, 0.900 mmol) with n- butylamine (889 µL, 9.00 mmol) and elution with 1:5 EtOAc/hexanes followed by 2:3 -1 EtOAc/hexanes afforded the product as a pale brown oil (183 mg, 84%). IR (thin film) ν¯ max (cm ): 3292 (s, C≡C–H). 1H NMR (500 MHz, CDCl3 ): δ 6.78 (d, J = 1.5 Hz, 1H, H4'), 6.73 (d, J = 8.0 Hz, 1H, H7'), 6.70 (dd, J = 8.0, 1.5 Hz, 1H, H6''), 5.91 (s, 2H, H2'), 3.56–3.52 (m, 1H, H2), 2.88 (dd, J = 13.5, 6.0 Hz, 1H, H1a), 2.85–2.78 (m, 2H, H1b+H1a’’), 2.53 (ddd, J = 11.0, 9.0, 5.5 Hz, 1H, H1b''), 2.29 (d, J = 2.0 Hz, 1H, H4), 1.6–1.0 (m, 5H, NH+H2''+H3''), 0.87 (t, J = 7.5 Hz, 3H, H4'').
13C NMR (125 MHz, CDCl
3): δ 147.2 and 16.1 (C3a' and C7a'), 130.8 (C5'), 122.5 (C6'), 109.8 and 108.0 (C4' and C7'), 100.7 (C2'), 84.5 (C3), 72.4 (C4), 51.2 (C2), 47.0, 41.3, 31.8, 20.3 (C1, C1'', C2'', C3''), 13.9 (C4''). HRMS–EI (m/z): M
+ calcd for C
15H
19NO
2 , 245.1416; found, 245.1427. [00178] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as colourless rods (mp 166–168 °C).
1H NMR (500 MHz, CDCl
3): δ 10.6–9.5 (2×br s, 2H, NH2), 6.83 (d, J = 1.5 Hz, 1H, H4'), 6.80 (dd, J = 8.0, 1.5 Hz,
1H, H6'), 6.73 (d, J = 8.0 Hz, 1H, H7'), 5.95–5.92 (m [AB system], 2H, H2'), 4.04–3.95 (m [app dt], 1H, H2), 3.63 (dd, J = 13.0, 3.5 Hz, 1H, H1a), 3.28– 3.15 (m [app m+dd], 2H, H1b+H1a''), 3.09–3.01 (m, 1H, H1b''), 2.59 (d, J = 2.5 Hz, 1H, H4), 2.00–1.87 (
m, 2H, H2''), 1.50–1.36 (m, 2H, H3''), 0.92 (t, J = 7.5 Hz, 3H, H4''). Anal. Calcd for C
15H
20ClNO
2: C, 63.94; H, 7.15; N, 4.97. Found: C, 63.75; H, 7.34; N, 4.86. 1-(1,3-Benzodioxol-5-yl)-N-benzylbut-3-yn-2-amine (UWA-087, “Compound 3H”)
[00179] Following the general procedure 3, reaction of the propargyl tosylate P2 (310 mg, 0.900 mmol) with benzylamine (2.56 mL, 2.44 mmol) and elution with 1:5 EtOAc/hexanes followed by 2:3 EtOAc/hexanes afforded the product as a pale yellow oil which solidified upon standing (202 mg, 80%). IR (thin film) ν¯ max (cm-1): 3288 (s, C≡C–H). 1H NMR (500 MHz, CDCl
3 ): δ 7.36–7.23 (m, 5H, H2'', H3'', H4'', H5'', H6''), 6.80 (d, J = 1.5 Hz, 1H, H4'), 6.76 (d, J = 8.0 Hz, 1H, H7'), 6.73 (dd, J = 8.0, 1.5 Hz, 1H, H6'), 5.94–5.93 (m, 2H, H2'), 4.04 (d, J = 13.0 Hz, 1H, NCHaH), 3.83 (d, J = 13.0 Hz, 1H, NCHHb), 3.59 (ddd, J = 7.0, 6.5, 2.0 Hz, 1H, H2), 2.92 (dd, J = 13.5, 6.5 Hz, 1H, H1a), 2.89 (dd, J = 13.5, 7.0 Hz, 1H, H1b), 2.38 (d, J = 2.5 Hz, 1H, H4), 1.48 (br s, NH+H
2O).
13 C NMR (125 MHz, CDCl
3): δ 147.4 and 146.3 (C3a' and C7a'), 139.7 (C1''), 131.1 (C5'), 128.3 and 128.2 (C2''+C6'' and C3''+C5''), 127.0
(C4''), 122.6 (C6'), 109.9 and 108.0 (C4' and C7'), 100.8 (C2'), 84.6 (C3), 72.6 (C4), 51.1 (NCH
2), 50.4 (C2), 41.5 (C1). HRMS–EI (m/z): M
+ calcd for C
18H
17NO
2, 279.1259; found, 279.1273. [00180] The free base was converted to the crude hydrochloride and was recrystallised from 2- propanol as a colourless amorphous powder (mp 196–199 °C).
1H NMR (500 MHz, CDCl
3): δ 10.5 (br s, 2H, NH
2), 7.67–7.62 (m [app d], 2H, H2''+H6''), 7.38–7.32 (m [app t], 2H, H3''+H5''), 7.28–7.23 (m, 1H, H4''), 6.76–6.69 (m, 3H, H4', H6', H7'), 5.93–5.91 (m [AB system], 2H, H2'), 4.26 (d, J = 13.0 Hz, 1H, NCHaH), 4.13 (d, J = 13.0 Hz, 1H, NCHHb), 3.73 (ddd, J = 11.5, 4.0, 2.0 Hz, 1H, H2), 3.39 (dd, J = 13.0, 4.0 Hz, 1H, H1
a), 3.08 (dd, J = 13.0, 11.0 Hz, 1H, H1
b), 2.68 (d, J = 2.5 Hz, 1H, H4). Anal. Calcd for C
18H
17NO
2: C, 68.46; H, 5.75; N, 4.44. Found: C, 68.12; H, 5.58; N, 4.30. Compounds of type 4 [00181] Compounds of type 4 may be synthesised via the following general procedure 4;
[00182] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 4 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethan-1-one (“Ketone K4”)
[00183] Ketone K4 is a known compound, also obtainable by the previously reported method.
4 2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethan-1-amine (UWA-074, “Compound 4A”)
[00184] Compound 4A is a known compound, also obtainable by the previously published method.
2 – page 78 (R)-2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethan-1-amine (“Compound 4AR”) and (S)-2- (benzo[d][1,3]dioxol-5-yl)-1-phenylethan-1-amine (“Compound 4AS”)
[00185] Compounds 4AR and 4AS are obtainable via crystallization of diastereomeric tartrate salts of compound 4A or via chiral column chromatography. 2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-phenylethan-1-amine (UWA-001, “Compound 4B”)
[00186] Compound 4B is a known compound, also obtainable by the previously published method.
4 2-(benzo[d][1,3]dioxol-5-yl)-N-ethyl-1-phenylethan-1-amine (UWA-066, “Compound 4C”)
[00187] Compound 4C is a known compound, also obtainable by the previously published method.
2 – page 78 N-(2-(3a,4-dihydrobenzo[d][1,3]dioxol-5-yl)-1-phenylethyl)propan-1-amine (UWA-068, “Compound 4D”)
[00188] Compound 4D is a known compound, also obtainable by the previously published method.
2 – page 79 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)propan-2-amine (UWA-065, “Compound 4E”)
[00189] Compound 4E is a known compound, also obtainable by the previously published method.
2 – page 81 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)butan-1-amine (UWA-064, “Compound 4F”)
[00190] Compound 4F is a known compound, also obtainable by the previously published method.
2 – page 80 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)-2-methylpropan-2-amine (“Compound 4G”)
[00191] Compound 4G is a known compound, also obtainable by the previously published method.
2 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)prop-2-en-1-amine (UWA-069, “Compound 4H”)
[00192] Compound 4H is a known compound, also obtainable by the previously published method.
2 – page 82 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)prop-2-yn-1-amine (UWA-070, “Compound 4I”)
[00193] Following the general procedure 4, reaction of the ketone K4 (144 mg, 0.60 mmol) with propargylamine (384 μL, 6.00 mmol) and elution with 20:80:1 EtOAc/Hex/NEt
3 afforded the secondary amine 4I as a colourless gum (138 mg, 82 %).
1H NMR (400 MHz, CDCl
3): δ 7.37–7.23 (m, 5H, Ph), 6.71 (d, J = 7.8 Hz, 1H, H7'), 6.68 (d, J = 1.6 Hz, 1H, H4'), 6.61 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.92 (s, 2H, H2'), 4.06 (dd, J = 8.7, 5.5 Hz, 1H, H1), 3.31 (dd, J = 17.2, 2.5 Hz, 1H, H1''a), 3.05 (dd, J = 17.2, 2.4 Hz, 1H, H1''b), 2.90 (dd, J = 13.7, 5.4 Hz, 1H, H2a), 2.79 (dd, J = 13.7, 8.7 Hz, 1H, H2b), 2.17 (t, J = 2.4 Hz, 1H, H3'').
13C NMR (100 MHz, CDCl
3): δ 147.8 and 146.3 (C3a' and C7a'), 142.5 (C1'''), 132.2 (C5'), 128.6 (C3'''/5'''), 127.6 (C2'''/6'''), 127.5 (C4'''), 122.4 (C6'), 109.5 (C4'), 108.3 (C7'), 101.0 (C2'), 82.1 (C2''), 71.5 (C3''), 62.6 (C1), 44.7 (C2), 35.9 (C1''). HRMS (ESI+) m/z [M + H]
+ calcd for C
18H
18NO
2 + 280.1332; found, 280.1331. [00194] The free base was converted to the crude hydrochloride and recrystallised from 2-propanol/Et
2O as colourless rhomboids.
1H NMR (400 MHz, d
6-DMSO): δ 9.99 (br. s, 2H, NH
2), 7.46–7.34 (m, 5H, Ph), 6.73 (d, J = 7.9 Hz, 1H, H7'), 6.60 (d, J = 1.6 Hz, 1H, H4'), 6.47 (dd, J = 7.9, 1.6 Hz, 1H, H6'), 5.93 (s, 2H, H2'), 4.51–4.37 (m, 1H, H1), 3.76–3.61 (m, 2H, H1''), 3.46–3.36 (m, 2H, H2), 3.06 (t, J = 11.8 Hz, 1H, H3''). [00195] Compound 4I is a known compound, also obtainable by the previously published method.
2 – page 83 N-(2-(benzo[d][1,3]dioxol-5-yl)-1-phenylethyl)aniline (UWA-067, “Compound 4J”)
[00196]
[00197] Compound 4J is a known compound, also obtainable by the previously published method.
2 – page 85 2-(benzo[d][1,3]dioxol-5-yl)-N-benzyl-1-phenylethan-1-amine (UWA-063, “Compound 4K”) [00198]
[00199] Compound 4K is a known compound, also obtainable by the previously published method.
2 – page 84 Compounds of type 5 [00200] Compounds of type 5 may be synthesised via the following general procedure 5;
[00201] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 5 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-cyclohexylethan-1-one (“Ketone K5”)
[00202] Ketone K5 is a known compound, also obtainable by the previously published method.
4 2-(benzo[d][1,3]dioxol-5-yl)-1-cyclohexyl-N-methylethan-1-amine (UWA-079, “Compound 5A”)
[00203] Compound 5A is a known compound, also obtainable by the previously published method.
4 Compounds of type 6 [00204] Compounds of type 6 may be synthesised via the following general procedure 6;
[00205] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 6 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-(thiophen-2-yl)ethan-1-one (“Ketone K6”)
[00206] Ketone K6 is a known compound, also obtainable by the previously published method.
2 – page 44 2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(thiophen-2-yl)ethan-1-amine (UWA-059, “Compound 6A”)
[00207] Compound 6A is a known compound, also obtainable by the previously published method.
2 – page 49 Compounds of type 7 [00208] Compounds of type 7 may be synthesised via the following general procedure 7;
[00209] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 7 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-(thiophen-3-yl)ethan-1-one (“Ketone K7”)
[00210] Ketone K7 is a known compound, also obtainable by the previously published method.
2 – pages 44 and 45
2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(thiophen-3-yl)ethan-1-amine (“Compound 7A”)
[00211] Compound 7A is a known compound, also obtainable by the previously published method.
2 – pages 49 and 50 Compounds of type 8 [00212] Compounds of type 8 may be synthesised via the following general procedure 8;
[00213] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will understand that the acid chloride precursor utilized in general procedure 8 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-(furan-3-yl)ethan-1-one (“Ketone K8”)
[00214] Ketone K8 is a known compound, also obtainable by the previously published method.
2 – page 44 2-(benzo[d][1,3]dioxol-5-yl)-1-(furan-3-yl)-N-methylethan-1-amine (UWA-071, “Compound 8A”)
[00215] Compound 8A is a known compound, also obtainable by the previously published method.
2 – page 50 2-(Benzo[d][1,3]dioxol-5-yl)-1-(tetrahydrofuran-2-yl)ethanone (“Ketone K8TH”)
[00216] A solution of 1.0 M LiHMDS in THF (12.4 mL, 12.4 mmol) was added to a stirred solution of methyl homopiperonylate (2.32 g, 12.0 mmol) in anhydrous THF (15 mL) at –78 °C under N
2. The reaction solution was stirred at –78 °C for 1.5 h before being treated with methyl tetrahydrofuran-2-carboxylate (1.04 g, 8.01 mmol) added dropwise. The resulting solution was gradually warmed to room temperature overnight, quenched with half-saturated NH4Cl (60 mL) and extracted with CH
2Cl
2 (3 × 60 mL). The extract was washed with brine (30 mL), dried and evaporated and the crude residue subjected to flash chromatography. Gradient elution with 1:19 EtOAc/hexanes → 1:4 EtOAc/hexanes afforded partially purified β-ketoester as a yellow oil (1.45 g), which was dissolved in 8:8:1 water/AcOH/H
2SO
4 (17 mL). The resulting solution was stirred under reflux for 1.5 h, cooled to room temperature, diluted with water (50 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:19 EtOAc/hexanes → 3:17 EtOAc/hexanes afforded the ketone K8TH as a pale yellow oil (436 mg, 23%).
1H NMR (400 MHz, CDCl
3): δ 6.75 (d, J = 7.9 Hz, 1H, H7′), 6.71 (d, J = 1.5 Hz, 1H, H4′), 6.65 (dd, J = 7.9, 1.6 Hz, 1H, H6′), 5.94 (s, 2H, H2′), 4.39 (dd, J = 8.0, 5.9 Hz, 1H, H2′′), 3.97–3.87 (m, 2H, H5′′), 3.80 (d [AB], J = 15.8 Hz, 1H, H2), 3.74 (d [AB], J = 15.8 Hz, 1H, H2), 2.20–2.10 (m, 1H, H3′′), 1.97–1.78 (m, 3H, H3′′ & H4′′) ppm.
13C NMR (100 MHz, CDCl
3) δ 209.9, 147.9, 146.7, 127.4, 122.9, 110.2, 108.5, 101.1, 83.1, 69.5, 45.1, 29.3, 25.8 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(tetrahydrofuran-2-yl)ethanamine (UWA-106, GAP- 058, “Compound 8ATH”)
[00217] An 8.03 M solution of methylamine in EtOH (0.71 mL, 5.7 mmol) and AcOH (0.36 mL, 6.3 mmol) were added successively to a cold (0°C), stirred mixture of ketone K8TH (124 mg, 0.529 mmol) and 3A sieves (156 mg) in 2:1 THF/MeOH (3.0 mL). Sodium cyanoborohydride (41 mg, 0.65 mmol) was added and the reaction vessel was flushed with N
2, sealed and stirred at 50 °C for 48 h before being cooled to room temperature and quenched with 1 M HCl (15 mL). The resulting mixture was vacuum filtered through a pad of Celite, washing through with MeOH (3 × 25 mL). The filtrate was concentrated under reduced pressure and the residue was basified with 1 M NaOH (30 mL) and extracted with CH
2Cl
2 (3 × 30 mL). The extract was washed with brine (30 mL), dried and evaporated, and the residue was subjected to flash chromatography. Gradient elution with 1:1 EtOAc/hexanes → 1:24:25 NEt
3/EtOAc/hexanes afforded amine 8ATH as a colourless oil (110 mg, 83 %) as a 1:1 mixture of diastereomers.
1H NMR (400 MHz, CDCl
3): δ 6.75–6.71 (m, 2H), 6.68–6.63 (m, 1H), 5.93 (s, 2H), 3.91–3.80 (m, 1H), 3.79–3.66 (m, 2H), 2.83–2.71 (m, 1H), 2.69–2.57 (m, 2H), 2.42 and 2.41 (s, 3H, NCH
3), 1.92–1.78 (m, 3H), 1.90–1.85 and 1.66–1.58 (m, 1H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.8, 147.7, 146.04, 146.00, 133.4, 132.9, 122.34, 122.29, 109.8, 109.7, 108.31, 108.27, 101.0, 80.7, 80.5, 68.3, 68.165.1, 64.0, 36.63, 36.57, 35.1, 34.6, 28.5, 26.7, 26.3, 26.2 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
14H20NO3
+ 250.1438; found, 250.1434. [00218] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as a 5*:4
# mixture of diastereomers as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 10.11 (br s, 1H)*, 9.48 (br s, 1H)
#, 9.19 (br s, 1H)
#, 8.52 (br s, 1H)*, 6.80–6.69 (m, 3H), 5.95 (s, 2H)*, 5.94 (s, 2H)
#, 4.16–4.05 (m, 1H), 4.02–3.92 (m, 1H), 3.79–3.70 (m, 1H), 3.51– 3.43 (m, 1H)*, 3.35–3.27 (m, 1H), 3.20 (br m, 1H)
#, 2.95–2.89 (m, 1H), 2.72 (br s, 3H), 2.13– 2.05 (m, 1H), 2.05–2.00 (m, 1H)*, 1.96–1.86 (m, 2H), 1.60–1.49 (m, 1H)
# ppm. Compounds of type 9 [00219] Compounds of type 9 may be synthesised via the following general procedure 9;
[00220] wherein R is selected from the group consisting of; methyl, ethyl, and -C
3-9alkyl, and R
1 and R
2 are as defined for the compound of Formula II’. The skilled addressee will
understand that the acid chloride precursor utilized in general procedure 9 may be interchanged with a corresponding acid anhydride precursor or mixed acid anhydride precursor. The skilled addressee will also understand that the sodium chloride utilized in the Krapcho decarboxylation step may be substituted with an alternative source of chloride ions, such as lithium chloride, or potassium chloride. 2-(benzo[d][1,3]dioxol-5-yl)-1-(furan-2-yl)ethan-1-one (“Ketone K9”)
[00221] Ketone K9 is a known compound, also obtainable by the previously published method.
2 – page 43 2-(benzo[d][1,3]dioxol-5-yl)-1-(furan-2-yl)-N-methylethan-1-amine (“Compound 9A”)
[00222] Compound 9A is a known compound, also obtainable by the previously published method.
2 – page 51 Compounds of type 10 [00223] Compounds of type 10 may be synthesised via the following general procedure 10;
[00224] wherein R
1 and R
2 are as defined for the compound of Formula II’. 2-(benzo[d][1,3]dioxol-5-yl)-1-(pyridin-2-yl)ethan-1-one (“Ketone K10”)
[00225] Ketone K10 is a known compound, obtained by the previously published method in accordance with general procedure 10.
17 – page 49 2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(pyridin-2-yl)ethan-1-amine (“Compound 10A”)
Compound 10A is a known compound, obtained by the previously published method in accordance with general procedure 10.
17 – page 59 Compounds of type 11 [00226] Compounds of type 11 may be synthesised via the following general procedure 11;
[00227] wherein R
1 and R
2 are as defined for the compound of Formula II’. 2-(benzo[d][1,3]dioxol-5-yl)-1-(pyridin-3-yl)ethan-1-one (“Ketone K11”)
[00228] Ketone K11 is a known compound, obtained by the previously published method, in accordance with general procedure 11.
17 – page 49 2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(pyridin-3-yl)ethan-1-amine (“Compound 11A”)
[00229] Compound 11A is a known compound, obtained by the previously published method in accordance with general procedure 11.
17 – page 60
Compounds of type 12 [00230] Compounds of type 12 may be synthesised via the following general procedure 12;
wherein R
1 and R
2 are as defined for the compound of Formula II’. 2-(benzo[d][1,3]dioxol-5-yl)-1-(pyridin-4-yl)ethan-1-one (“Ketone K12”)
[00231] Ketone K12 is a known compound, obtained by the previously published method, in accordance with general procedure 12.
17 – page 50 2-(benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(pyridin-4-yl)ethan-1-amine (“Compound 12A”)
[00232] Compound 12A is a known compound, obtained by the previously published method in accordance with general procedure 12.
17 – page 61 Compounds of type 13 [00233] Compounds of type 13 may be synthesised via the following general procedure 13;
2-(Benzo[d][1,3]dioxol-5-yl)-1-(spiro[2.2]pentan-1-yl)ethanone (“Ketone K27”)
[00277] A stirred solution of spiro[2.2]pentane-1-carboxylic acid (12 mg, 0.11 mmol) in PhMe (0.2 mL) was treated with oxalyl chloride (10 μL, 0.12 mmol) followed by one drop of DMF. The resulting solution was stirred at room temperature under N
2 for 2.5 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (0.22 mL, 0.22 mmol) was added to a stirred solution of methyl homopiperonylate (19 mg, 0.10 mmol) in anhydrous THF (0.4 mL) at –78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature over 2 h, quenched with half-saturated NH4Cl (15 mL), and extracted with CH
2Cl
2 (3 × 15 mL). The extract was washed with brine (20 mL), dried and evaporated to give a pale brown oil (34 mg), which was dissolved in 9:1 DMSO/water (0.60 mL). The resulting solution was degassed and stirred at 120 °C under N
2 for 64 h. The reaction solution was cooled to room temperature, diluted with water (20 mL) and extracted with CH
2Cl
2 (3 × 15 mL). The extract was washed with brine (15 mL), dried and evaporated and the crude
residue was subjected to preparative thin-layer chromatography. Development with 3:17 EtOAc/hexanes afforded ketone K27 as a colourless oil (17 mg, 75%).
1H NMR (500 MHz, CDCl
3): δ 6.76 (d, J = 7.9 Hz, 1H), 6.67 (d, J = 1.5 Hz, 1H), 6.62 (dd, J = 7.9, 1.5 Hz, 1H), 5.94 (s, 2H), 3.63 (d [AB], J = 15.1 Hz, 1H), 3.59 (d [AB], J = 15.1 Hz, 1H), 2.29 (dd, J = 7.3, 4.4 Hz, 1H), 1.61 (dd [app. t], J = 4.0 Hz, 1H), 1.38 (dd, J = 7.3, 3.6 Hz, 1H), 0.95–0.90 (m, 1H), 0.86– 0.75 (m, 2H), 0.66–0.61 (m, 1H) ppm.
13C NMR (125 MHz, CDCl
3) δ 207.5, 147.9, 146.6, 128.0, 122.6, 109.9, 108.5, 101.1, 49.7, 28.2, 22.0, 16.9, 6.9, 5.4 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(spiro[2.2]pentan-1-yl)ethanamine (UWA-115, GAP-146, “Compound 27A”)
[00278] According to General Procedure A; ketone K27 (15 mg, 65 μmol) was reacted for 20 h to afford amine 27A as a 11*:9
# mixture of diastereomers as a pale yellow oil (13 mg, 81%).
1H NMR (600 MHz, CDCl
3) δ 6.73 (d, J = 7.8 Hz, 1H)
#, 6.72 (d, J = 1.6 Hz, 1H)
#, 6.71 (d, J = 7.8 Hz, 1H)*, 6.67 (dd, J = 7.8, 1.6 Hz, 1H)
#, 6.62 (d, J = 1.6 Hz, 1H)*, 6.58 (dd, J = 7.8, 1.6 Hz, 1H)*, 5.921 (s, 2H)
#, 5.918 (s, 2H)*, 2.87 (dd, J = 13.7, 4.5 Hz, 1H)
#, 2.67 (dd, J = 13.7, 8.0 Hz, 1H)
#, 2.64 (dd, J = 13.5, 7.0 Hz, 1H)*, 2.55 (dd, J = 13.5, 5.9 Hz, 1H)*, 2.48 (s, 3H)*, 2.26 (s, 3H)
#, 2.21 (ddd, J = 8.5, 8.5, 4.5 Hz, 1H)
#, 2.14 (ddd, J = 9.1, 7.0, 6.1 Hz, 1H)*, 1.12–1.03 (m, 1H)
#,*, 0.99 (dd, J = 7.7, 4.0 Hz, 1H)*, 0.93 (dd, J = 8.2, 4.2 Hz, 1H)
#, 0.81–0.71 (m, 4H)
3 × #,*, 0.69–0.66 (m, 1H)*, 0.63–0.58 (m, 1H)
#,*, 0.57–0.54 (m, 1H)*, 0.47 (dd [app. t], J = 4.5 Hz, 1H)
#, 0.31–0.27 (m, 1H)* ppm.
13C NMR (150 MHz, CDCl
3) δ 147.7, 147.6, 146.03, 146.00, 133.3, 133.2, 122.43, 122.38, 109.9, 109.8, 108.2, 100.9, 65.7, 64.4, 41.4, 41.1, 34.8, 34.4, 22.9, 22.4, 15.0, 12.9, 12.1, 10.2, 6.1, 5.6, 5.1, 3.7 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
15H
20NO
2 + 246.1489; found, 246.1487. [00279] The free base was converted to the crude hydrochloride and was crystallised from Et
2O as a 3*:2
# mixture of diastereomers as colourless granules.
1H NMR (500 MHz, CDCl
3) δ 9.61 (br s, 1H)*, 9.57 (br s, 1H)*, 9.40 (br s, 2H)
#, 6.83–6.80 (m, 2H)
#, 6.76 (d, J = 8.4 Hz, 1H)
#, 6.73 (d, J = 7.8 Hz, 1H)*, 6.66 (d, J = 1.0 Hz, 1H)*, 6.64 (dd, J = 7.9, 1.0 Hz, 1H)*, 5.94 (s, 2H)
#,*, 3.37 (dd, J = 13.9, 6.1 Hz, 1H)
#, 3.32 (br d, J = 10 Hz, 1H)*, 3.16 (dd, J = 14.0, 7.8 Hz, 1H)
#, 2.89–2.81 (m, 2H)*, 2.78 (br s, 3H)*, 2.78–2.70 (m, 1H)
#, 2.53 (br s, 3H)
#, 1.58– 1.54 (m, 1H)
#, 1.48–1.43 (m, 1H)*, 1.19–1.15 (m, 1H)*, 1,14–1.08 (m, 1H)
#,*, 1.03–0.98 (m, 2H)
#, 0.84–0.79 (m, 1H)
#, 0.77–0.72 (m, 1H)
#, 0.65–0.59 (m, 1H)*, 0.46–0.38 (m, 2H)*, 0.33 (dd [app. t], J = 4.6 Hz, 1H)
#, (–0.46)–(–0.51) (m, 1H)* ppm.
3-(Benzo[d][1,3]dioxol-5-yl)-1,1,1-trifluoropropan-2-one (“Ketone K88”)
[00280] A solution of 1.0 M LiHMDS in THF (8.1 mL, 8.1 mmol) was added to a stirred solution of methyl homopiperonylate (750 mg, 3.86 mmol) in anhydrous THF (8 mL) at –78 °C under N
2. The reaction solution was stirred at –78 °C for 1.5 h before being treated with trifluoroacetic anhydride (0.64 mL, 4.6 mmol) added dropwise. The resulting solution was gradually warmed to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a yellow oil (1039 mg), which was dissolved in 9:1 DMSO/water (15 mL). The resulting solution was degassed and stirred at 130 °C under N
2 for 18 h. The reaction solution was cooled to room temperature, diluted with water (120 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:19 EtOAc/hexanes → 3:17 EtOAc/hexanes afforded a 7:3 mixture of ketone K88 and its hydrate as a pale yellow oil (296 mg). This oil was dissolved in anhydrous CH
2Cl
2 and treated with anhydrous MgSO
4 (502 mg). The resulting mixture was stirred under reflux under N
2 for 4 h before being filtered and evaporated to afford ketone K88 as a pale yellow oil (281 mg, 31%). .
1H NMR (400 MHz, CDCl
3): δ 6.79 (d, J = 7.9 Hz, 1H), 6.69 (d, J = 1.5 Hz, 1H), 6.66 (dd, J = 7.9, 1.8 Hz, 1H), 5.97 (s, 2H), 3.92 (s, 2H) ppm.
19F NMR (376 MHz, CDCl
3) δ –78.2 (s, 3F) ppm.
13C NMR (100 MHz, CDCl
3) δ 189.1 (q, J = 34.8 Hz), 148.3, 147.6, 123.8, 123.1, 115.9 (q, J = 291 Hz), 110.0, 108.8, 101.4, 42.8 ppm. 3-(Benzo[d][1,3]dioxol-5-yl)-1,1,1-trifluoro-N-methylpropan-2-amine (UWA-132, GAP-145, “Compound 88A”)
According to General Procedure A; ketone K88 (114 mg, 0.492 mmol) was reacted for 72 h to afford amine 88A as a colourless oil (17 mg, 14%).
1H NMR (400 MHz, CDCl
3) δ 6.77 (d, J = 7.9 Hz, 1H), 6.72 (d, J = 1.6 Hz, 1H), 6.67 (dd, J = 7.9, 1.6 Hz, 1H), 5.95 (s, 2H), 3.10 (ddq, J = 10.2, 3.6, 7.1 Hz, 1H), 3.00 (dd, J = 14.3, 3.6 Hz, 1H), 2.58 (dd, J = 14.3, 10.2 Hz, 1H), 2.42 (q, J = 1.0 Hz, 3H) ppm.
19F NMR (376 MHz, CDCl
3) δ –74.6 (s, 3F) ppm.
13C NMR (100 MHz, CDCl
3) δ 148.1, 146.8, 130.3, 126.9 (q, J = 282 Hz), 122.4, 109.3, 108.6, 101.2, 62.8 (q, J =
26.8 Hz), 35.7 (q, J = 1.1 Hz), 34.5 (q, J = 2.4 Hz) ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
11H
13F
3NO
2 + 248.0893; found, 248.0890. [00281] The free base was converted to the crude hydrochloride and was recrystallised from iPrOH/PhMe as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 10.57 (br s, 2H), 6.86– 6.82 (m, 2H), 6.78 (dd, J = 7.1, 1.4 Hz, 1H), 5.96 (s, 2H), 3.86 (m [app. sextet] = 7.0 Hz, 1H), 3.46 (dd, J = 14.8, 5.9 Hz, 1H), 3.19 (dd, J = 14.7, 7.7 Hz, 1H), 2.76 (s, 3H) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(tetrahydro-2H-pyran-4-yl)ethanone (“Ketone K89”)
[00282] A solution of 1.0 M LiHMDS in THF (8.4 mL, 8.4 mmol) was added to a stirred solution of methyl homopiperonylate (767 mg, 3.95 mmol) in anhydrous THF (8 mL) at –78 °C under N
2. The reaction solution was stirred at –78 °C for 1.5 h before being treated dropwise with oxane-4-carbonyl chloride (645 mg, 4.34 mmol). The resulting solution was gradually warmed to room temperature overnight, quenched with saturated NH4Cl (60 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a pale brown oil (1.37 g), which was dissolved in 9:1 DMSO/water (14 mL) and treated with NaCl (941 mg, 16.1 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 20 h. The reaction mixture was cooled to room temperature, diluted with water (100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:9 EtOAc/hexanes → 1:3 EtOAc/hexanes afforded ketone K89 as a pale yellow solid (871 mg, 89%).
1H NMR (400 MHz, CDCl
3) δ 6.76 (d, J = 7.9 Hz, 1H), 6.67 (d, J = 1.7 Hz, 1H), 6.62 (dd, J = 7.9, 1.7 Hz, 1H), 5.95 (s, 2H), 3.98 (ddd [app. dt], J = 11.4, 3.4 Hz, 2H), 3.65 (s, 2H), 3.45– 3.34 (m, 2H), 2.72–2.60 (m, 1H), 1.77–1.67 (m, 4H) ppm.
13C NMR (100 MHz, CDCl
3) δ 209.4, 148.1, 146.8, 127.6, 122.6, 109.9, 108.6, 101.2, 67.3, 47.3, 46.8, 28.4 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(tetrahydro-2H-pyran-4-yl)ethanamine (UWA-141, GAP-114, “Compound 89A”)
[00283] According to General Procedure A; ketone K89 (125 mg, 0.503 mmol) was reacted for 40 h to afford amine 89A as a colourless oil (116 mg, 88%).
1H NMR (400 MHz, CDCl
3) δ 6.74 (d, J = 7.9 Hz, 1H), 6.68 (d, J = 1.6 Hz, 1H), 6.63 (dd, J = 7.9, 1.6 Hz, 1H), 5.94 (s, 2H), 4.06–3.98 (m, 2H), 3.41–3.32 (m, 2H), 2.75–2.67 (m, 1H), 2.50–2.42 (m, 2H), 2.33 (s, 3H), 1.77–1.68 (m, 1H), 1.62–1.56 (m, 2H), 1.55–1.43 (m, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.9, 146.1, 133.6, 122.2, 109.4, 108.4, 101.0, 68.52, 68.49, 65.6, 37.5, 36.5, 34.7, 29.5, 29.0 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
15H
22NO
3 + 264.1594; found, 264.1591. [00284] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as colourless microneedles.
1H NMR (400 MHz, CDCl
3) δ 9.46 (br s, 2H), 6.81 (dd, J = 8.0, 1.6 Hz, 1H), 6.79–6.75 (m, 2H), 5.96 (s, 2H), 4.05–3.99 (m, 2H), 3.43–3.35 (m, 2H), 3.10 (dd, J = 13.1, 6.7 Hz, 1H), 3.06–2.94 (m, 2H), 2.53 (s, 3H), 2.26–2.15 (m, 1H), 1.83–1.75 (m, 2H), 1.74–1.67 (m, 1H), 1.66–1.55 (m, 1H) ppm. Perfluorophenyl oxetane-3-carboxylate (Ester E90)
[00285] A solution of N,N′-Dicyclohexylcarbodiimide (1.08 g, 5.23 mmol) and DMAP (53 mg, 0.43 mmol) in CH
2Cl
2 (5 mL) was added to a cold (0 °C) stirred mixture of oxetane-3- carboxylic acid (403 mg, 3.95 mmol) and pentafluorophenol (910 mg, 4.94 mmol) in CH
2Cl
2 (10 mL). The resulting mixture was stirred at room temperature for 24 h and vacuum filtered through a pad of Celite, washing through with CH
2Cl
2 (3 × 30 mL). The filtrate was concentrated and the crude residue was subjected to flash chromatography. Repeated gradient elution with 1:49 EtOAc/hexanes → 1:9 EtOAc/hexanes afforded a 17:3 mixture of ester E90 and pentafluorophenol as a pale yellow oil (339 mg, 29% by qNMR).
1H NMR (400 MHz, CDCl
3) δ 4.98 (d, J = 7.6 Hz, 4H), 4.21 (quintet, J = 7.6 Hz, 1H) ppm.
19F NMR (376 MHz, CDCl
3) δ (– 152.8)–(–153.0) (m, 2F), –157.1 (t, J = 21.7 Hz, 1F), (–161.7)–(–161.9) (m, 2F) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(oxetan-3-yl)ethanone (“Ketone K90”)
[00286] A solution of 1.0 M LiHMDS in THF (1.28 mL, 1.28 mmol) was added to a stirred solution of methyl homopiperonylate (236 mg, 1.22 mmol) in anhydrous THF (2.5 mL) at –78 °C under N
2. The reaction solution was stirred at –78 °C for 1.5 h before being treated dropwise with a solution of ester E90 and pentafluorophenol (17:3 mixture, 151 mg; contained 0.50 mmol E90 by qNMR) in THF (2.0 mL). The resulting solution was gradually warmed to room temperature overnight and quenched with half-saturated NH
4Cl (30 mL), and extracted with CH
2Cl
2 (3 × 30 mL). The extract was washed with brine (30 mL), dried and evaporated and the crude residue subjected to flash chromatography. Gradient elution with 1:9 EtOAc/hexanes → 1:4 EtOAc/hexanes afforded partially purified β-ketoester as a pale yellow oil (139 mg), which was dissolved in 9:1 DMSO/water (5 mL). The resulting solution was degassed and stirred at 110 °C under N
2 for 14 h. The reaction solution was cooled to room temperature, diluted with water (30 mL) and extracted with CH
2Cl
2 (3 × 20 mL). The extract was washed with brine (20 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:9 EtOAc/hexanes → 1:3 EtOAc/hexanes afforded ketone K90 as a colourless solid (54 mg, 48%).
1H NMR (600 MHz, CDCl
3): δ 6.77 (d, J = 7.9 Hz, 1H), 6.65 (d, J = 1.6 Hz, 1H), 6.61 (dd, J = 7.9, 1.6 Hz, 1H), 5.96 (s, 2H), 4.75 (dd, J = 6.7, 6.2 Hz, 2H), 4.66 (dd, J = 8.8, 6.2 Hz, 2H), 4.05–3.99 (m, 1H), 3.60 (s, 2H) ppm.
13C NMR (600 MHz, CDCl
3) δ 205.5, 148.2, 147.1, 126.7, 122.7, 109.8, 108.8, 101.3, 72.5, 48.4, 44.6 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(oxetan-3-yl)ethanamine (UWA-142 GAP-167, “Compound 90A”)
[00287] An 8.03 M solution of methylamine in EtOH (0.26 mL, 2.1 mmol) and AcOH (0.13 mL, 2.3 mmol) were added successively to a cold (0°C), stirred mixture of ketone K90 (47 mg, 0.21 mmol) and 3A sieves (54 mg) in 2:1 THF/MeOH (1.5 mL). Sodium cyanoborohydride (16 mg, 0.25 mmol) was added and the reaction vessel was flushed with N
2, sealed and stirred at 50 °C for 14 h before being cooled to room temperature, quenched with 1 M NaOH (15 mL) and extracted with CH
2Cl
2 (3 × 20 mL). The extract was vacuum filtered through a pad of Celite, washing through with CH
2Cl
2 (3 × 15 mL). The filtrate was dried and evaporated to afford the
secondary amine 90A as a colourless oil (47 mg, 94%).
1H NMR (600 MHz, CDCl
3): δ 6.73 (d, J = 7.9 Hz, 1H), 6.62 (d, J = 1.6 Hz, 1H), 6.56 (dd, J = 7.9, 1.6 Hz, 1H), 5.93 (s, 2H), 4.73 (dd, J = 7.6, 6.1 Hz, 1H), 4.63–4.58 (m, 2H), 4.39 (dd [app. t], J = 6.3 Hz, 1H), 3.03–2.95 (m, 2H), 2.57 (dd, J = 13.8, 4.7 Hz, 1H), 2.53 (dd, J = 13.8, 6.5 Hz, 1H), 2.37 (s, 3H) ppm.
13C NMR (150 MHz, CDCl
3) δ 147.9, 146.3, 131.9, 122.3, 109.6, 108.4, 101.1, 76.1, 75.0, 63.6, 39.8, 37.3, 34.3 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
13H
18NO
3 + 236.1281; found, 236.1279. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(oxazol-5-yl)ethanone (“Ketone K91”)
[00288] A stirred solution of oxazole-5-carboxylic acid (154 mg, 1.36 mmol) in PhMe (2.5 mL) was treated with oxalyl chloride (0.12 mL, 1.40 mmol) followed by two drops of DMF. The resulting solution was stirred at room temperature under N
2 for 5 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (2.9 mL, 2.9 mmol) was added to a stirred solution of methyl homopiperonylate (253 mg, 1.30 mmol) in anhydrous THF (4 mL) at –78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature overnight, quenched with half-saturated NH
4Cl (70 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give an orange residue (356 mg), which was dissolved in 4:1 trifluoroacetic acid/water (15 mL). The resulting solution was degassed and stirred at 80 °C under N
2 for 24 h. The reaction solution was cooled to room temperature, diluted with water (50 mL), basified with saturated NaHCO
3 (180 mL) and extracted with EtOAc (3 × 50 mL). The extract was washed with brine (50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:9 EtOAc/hexanes → 3:7 EtOAc/hexanes afforded ketone K91 as a beige solid (60 mg, 20%).
1H NMR (400 MHz, CDCl
3): δ 8.01 (s, 1H), 7.77 (s, 1H), 6.79–6.76 (m, 2H), 6.73 (dd, J = 8.0, 1.6 Hz, 1H), 5.95 (s, 2H), 4.02 (s, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 186.0, 153.4, 148.2, 147.2, 133.5, 126.4, 122.9, 110.0, 108.7, 101.3, 46.1 ppm. [00289] 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(oxazolidin-5-yl)ethanamine (UWA- 143, GAP-156, “Compound 91A”)
[00290] An 8.03 M solution of methylamine in EtOH (0.13 mL, 1.0 mmol) and AcOH (60 μL, 1.0 mmol) were added successively to a cold (0°C), stirred mixture of ketone K91 (24 mg, 0.10 mmol) and 3A sieves (34 mg) in 2:1 THF/MeOH (1.5 mL). Sodium cyanoborohydride (9.0 mg, 0.14 mmol) was added and the reaction vessel was flushed with N
2, sealed and stirred at 50 °C for 18 h before being cooled to room temperature, quenched with 1 M NaOH (15 mL) and extracted with CH
2Cl
2 (3 × 20 mL). The extract was vacuum filtered through a pad of Celite, washing through with CH
2Cl
2 (3 × 15 mL). The filtrate was dried and evaporated to give a brown oil (23 mg) which was dissolved in dry MeOH (1.5 mL) and treated with NaBH
4 (27 mg, 0.71 mmol). The resulting mixture was stirred at room temperature under N
2 for 96 h before being quenched with brine (15 mL) and extracted with CH
2Cl
2 (3 × 20 mL). The extract was dried and evaporated and the yellow crude residue was subjected to preparative thin-layer chromatography. Development with 3:3:94 NEt
3/MeOH/CH
2Cl
2 afforded amine 91A as a pale yellow solid (10 mg, 39%).
1H NMR (500 MHz, CDCl
3): δ 6.75–6.72 (m, 2H), 6.70 (dd, J = 7.9, 1.3 Hz, 1H), 5.92 (s, 2H), 3.77 (d, J = 11.3 Hz, 1H), 3.22 (d, J = 1.4 Hz, 1H), 3.10 (d, J = 11.3 Hz, 1H), 3.00–2.93 (m, 2H), 2.66 (dd, J = 13.0, 10.8 Hz, 1H), 2.63 (dd, J = 14.0, 1.5 Hz, 1H), 2.48 (br s, 2H), 2.28 (s, 3H), 2.28–2.23 (m, 1H) ppm.
13C NMR (125 MHz, CDCl
3) δ 147.8, 146.2, 131.5, 122.7, 110.1, 108.4, 101.0, 72.0, 68.7, 63.1, 51.7, 38.9, 35.2 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
13H
19N
2O
3 + 251.1390; found, 251.1386. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(1-fluorocyclopropyl)ethanone (“Ketone K92”)
[00291] A stirred solution of 1-fluorocyclopropanecarboxylic acid (454 mg, 4.36 mmol) in PhMe (4.4 mL) was treated with oxalyl chloride (0.38 mL, 4.40 mmol) followed by two drops of DMF. The resulting solution was stirred at room temperature under N
2 for 2 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (8.7 mL, 8.7 mmol) was added to a stirred solution of methyl homopiperonylate (774 mg, 3.98 mmol) in anhydrous THF (12 mL) at – 78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and
evaporated to give a dark yellow oil (1.13 g), which was dissolved 9:1 DMSO/water (16 mL) and treated with NaCl (1.05 g, 18.0 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 40 h. The reaction mixture was cooled to room temperature, diluted with water (100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:49 EtOAc/hexanes → 1:19 EtOAc/hexanes afforded ketone K92 as a colourless oil (375 mg, 42%).
1H NMR (400 MHz, CDCl
3) δ 6.77 (d, J = 7.9 Hz, 1H), 6.73 (d, J = 1.6 Hz, 1H), 6.68 (dd, J = 7.9, 1.6 Hz, 1H), 5.95 (s, 2H), 4.00 (d, J = 3.4 Hz, 2H), 1.41–1.38 (m, 2H), 1.37–1.34 (m, 2H).
19F NMR (376 MHz, CDCl
3) δ –196.9 ppm.
13C NMR (100 MHz, CDCl
3) δ 206.4 (d, J = 24.9 Hz), 147.9, 146.8, 126.8, 123.0, 110.3, 108.5, 101.2, 82.8 (d, J = 230 Hz), 45.4, 17.3 (d, J = 10.2 Hz) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(1-fluorocyclopropyl)-N-methylethanamine (UWA-144, GAP- 128, “Compound 92A”)
[00292] According to General Procedure A; ketone K92 (112 mg, 0.504 mmol) was reacted for 24 h to afford amine 92A as a colourless oil (94 mg, 79%).
1H NMR (400 MHz, CDCl
3) δ 6.74 (d, J = 7.9 Hz, 1H), 6.72 (d, J = 1.6 Hz, 1H), 6.68 (dd, J = 7.8, 1.7 Hz, 1H), 5.93 (s, 2H), 2.95 (dd, J = 13.8, 6.1 Hz, 1H), 2.81 (dd, J = 13.8, 8.1 Hz, 1H), 2.49 (s, 3H), 2.34 (ddd, J = 24.7, 8.1, 6.1 Hz, 1H), 1.16–1.03 (m, 1H), 0.95–0.82 (m, 1H), 0.71–0.60 (m, 1H), 0.35–0.24 (m, 1H) ppm.
19F NMR (376 MHz, CDCl
3) δ –196.5 ppm.
13C NMR (100 MHz, CDCl
3) δ 147.8, 146.2, 132.9, 122.4, 109.7, 108.3, 101.0, 78.7 (d, J = 219 Hz), 65.3 (d, J = 19.8 Hz), 38.3 (d, J = 1.6 Hz), 35.0, 10.6 (d, J = 12.3 Hz), 8.3 (d, J = 11.5 Hz) ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
13H
17FNO
2 + 238.1238; found, 238.1235. [00293] The free base was converted to the crude hydrochloride and was recrystallised from iPrOH/PhMe as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 9.99 (br s, 1H), 9.92 (br s, 1H), 6.81 (d, J = 1.5 Hz, 1H), 6.79 (dd, J = 7.9, 1.5 Hz, 1H), 6.74 (d, J = 7.9 Hz, 1H), 5.95 (d [AB], J = 1.4 Hz, 1H), 5,94 (d [AB], J = 1.4 Hz, 1H), 3.38 (dd, J = 13.2, 4.4 Hz, 1H), 3.28 (dd, J = 13.2, 11.0 Hz, 1H), 3.14–3.00 (m, 1H), 2.86 (dd, J = 5.6, 4.8 Hz, 3H), 1.28–1.06 (m, 2H), 1.01– 0.87 (m, 1H), 0.29–0.18 (m, 1H) ppm. 1-(Benzo[d][1,3]dioxol-5-yl)-3-cyclopropylpropan-2-one (“Ketone K93”)
[00294] A stirred solution of cyclopropylacetic acid (445 mg, 4.44 mmol) in PhMe (4.4 mL) was treated with oxalyl chloride (0.39 mL, 4.5 mmol) followed by one drop of DMF. The resulting solution was stirred at room temperature under N
2 for 2.5 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (8.7 mL, 8.7 mmol) was added to a stirred solution of methyl homopiperonylate (770 mg, 3.96 mmol) in anhydrous THF (12 mL) at –78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a yellow oil (1.24 g), which was dissolved 9:1 DMSO/water (16 mL) and treated with NaCl (1.21 g, 20.7 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 16 h. The reaction mixture was cooled to room temperature, diluted with water (100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:49 EtOAc/hexanes → 1:19 EtOAc/hexanes afforded ketone K93 as a colourless oil (674 mg, 78%). 1H NMR (400 MHz, CDCl
3) δ 6.76 (d, J = 7.9 Hz, 1H), 6.68 (d, J = 1.4 Hz, 1H), 6.63 (dd, J = 7.9, 1.7 Hz, 1H), 5.94 (s, 2H), 3.64 (s, 2H), 2.32 (d, J = 7.0 Hz, 1H), 1.04–0.92 (m, 1H), 0.60–0.50 (m, 2H), 0.11–0.02 (m, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 208.5, 148.0, 146.8, 128.0, 122.7, 110.0, 108.6, 101.2, 49.4, 47.2, 6.4, 4.7 ppm. 1-(Benzo[d][1,3]dioxol-5-yl)-3-cyclopropyl-N-methylpropan-2-amine (UWA-145, GAP-125, “Compound 93A”)
[00295] According to General Procedure A; ketone K93 (112 mg, 0.513 mmol) was reacted for 24 h to afford amine 93A as a colourless oil (112 mg, 93%).
1H NMR (400 MHz, CDCl
3) δ 6.74 (d, J = 7.8 Hz, 1H), 6.70 (d, J = 1.6 Hz, 1H), 6.64 (dd, J = 7.8, 1.6 Hz, 1H), 5.93 (s, 2H), 2.76–2.66 (m, 2H), 2.65–2.58 (m, 1H), 2.39 (s, 3H), 1.38–1.25 (m, 2H), 0.76–0.66 (m, 1H), 0.51–0.42 (m, 2H), 0.10–0.00 (m, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.8, 146.0,
133.6, 122.3, 109.6, 108.3, 100.9, 62.0, 40.4, 38.5, 34.1, 7.9, 4.9, 4.6 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
14H
20NO
2 + 234.1489; found, 234.1485. [00296] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 9.56 (br s, 1H), 9.50 (br s, 1H), 6.76 (d, J = 7.8 Hz, 1H), 6.74–6.70 (m, 2H), 5.95 (s, 2H), 3.33–3.24 (m, 2H), 2.94 (dd, J = 15.2, 10.3 Hz, 1H), 2.68 (dd [app. t], J = 5.6 Hz, 3H), 1.79 (ddd [app. dt], J = 14.8, 6.4 Hz, 1H), 1.53 (ddd, J = 14.8, 7.3, 5.5 Hz, 1H), 0.96–0.84 (m, 1H), 0.63–0.51 (m, 2H), 0.18–0.11 (m, 1H), 0.06–(–0.01) (m, 1H) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-cyclopentylethanone (“Ketone K94”)
[00297] A solution of 1.0 M LiHMDS in THF (9.4 mL, 9.4 mmol) was added to a stirred solution of methyl homopiperonylate (869 mg, 4.47 mmol) in anhydrous THF (9 mL) at –78 °C under N
2. The reaction solution was stirred at –78 °C for 1.5 h before being treated dropwise with cyclopentanecarbonyl chloride (661 mg, 4.99 mmol). The resulting solution was gradually warmed to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a yellow oil (1.67 g), which was dissolved in 9:1 DMSO/water (15 mL) and treated with NaCl (1.07 g, 18.4 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 18 h. The reaction mixture was cooled to room temperature, diluted with water (100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with water (50 mL) and brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:49 EtOAc/hexanes → 1:19 EtOAc/hexanes afforded ketone K94 as a colourless oil (952 mg, 92%).
1H NMR (400 MHz, CDCl
3) δ 6.76 (d, J = 7.9 Hz, 1H), 6.69 (d, J = 1.6 Hz, 1H), 6.64 (dd, J = 7.9, 1.7 Hz, 1H), 5.94 (s, 2H), 3.64 (s, 2H), 2.96 (quintet, J = 8.0 Hz, 1H), 1.82–1.49 (m, 8H) ppm.
13C NMR (100 MHz, CDCl
3) δ 210.9, 147.9, 146.7, 128.3, 122.7, 110.0, 108.5, 101.1, 50.6, 48.9, 29.3, 26.2 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-cyclopentyl-N-methylethanamine (UWA-146, GAP-116, “Compound 94A”)
[00298] According to General Procedure A; ketone K94 (119 mg, 0.512 mmol) was reacted for 60 h to afford amine 94A as a colourless oil (109 mg, 86%).
1H NMR (400 MHz, CDCl
3) δ 6.73 (d, J = 7.9 Hz, 1H), 6.71 (d, J = 1.6 Hz, 1H), 6.64 (dd, J = 7.8, 1.7 Hz, 1H), 5.92 (s, 2H), 2.70 (dd, J = 13.6, 4.6 Hz, 1H), 2.56 (dd, J = 13.6, 7.6 Hz, 1H), 2.52–2.48 (m, 1H), 2.36 (s, 3H), 1.98–1.87 (m, 1H), 1.82–1.69 (m, 2H), 1.66–1.47 (m, 4H), 1.35–1.24 (m, 2H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.7, 145.9, 133.9, 122.2, 109.7, 108.2, 100.9, 65.5, 43.2, 38.0, 34.1, 29.7, 29.4, 25.8, 25.7 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
15H
22NO
2 + 248.1645; found, 248.1642. [00299] The free base was converted to the crude hydrochloride and was recrystallised from iPrOH/PhMe as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 9.54 (br s, 1H), 8.99 (br s, 1H), 6.82 (dd, J = 7.9, 1.6 Hz, 1H), 6.78 (d, J = 1.5 Hz, 1H), 6.76 (d, J = 7.9 Hz, 1H), 5.95 (s, 2H), 3.21–3.12 (m, 2H), 2.96 (ddd [app. q], J = 8.5 Hz, 1H), 2.55 (dd [app. t], J = 5.3 Hz, 3H), 2.37–2.26 (m, 1H), 2.12–2.02 (m, 1H), 1.88–1.79 (m, 1H), 1.77–1.40 (m, 6H) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3,3-difluorocyclobutyl)ethanone (“Ketone K95”)
[00300] A stirred solution of 3,3-difluorocyclobutanecarboxylic acid (607 mg, 4.46 mmol) in PhMe (4.4 mL) was treated with oxalyl chloride (0.38 mL, 4.4 mmol) followed by two drops of DMF. The resulting solution was stirred at room temperature under N
2 for 2 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (8.8 mL, 8.8 mmol) was added to a stirred solution of methyl homopiperonylate (779 mg, 4.01 mmol) in anhydrous THF (12 mL) at – 78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a yellow oil (1.59 g), which was dissolved 9:1 DMSO/water (14 mL) and treated with NaCl (1.01 g, 17.3 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 18 h. The reaction mixture was cooled to room temperature, diluted with water
(100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:19 Et
2O/hexanes → 3:17 Et
2O/hexanes afforded ketone K95 as a colourless oil (628 mg, 62%).
1H NMR (400 MHz, CDCl
3) δ 6.77 (d, J = 7.8 Hz, 1H), 6.66 (d, J = 1.5 Hz, 1H), 6.63 (dd, J = 7.9, 1.7 Hz, 1H), 5.96 (s, 2H), 3.63 (s, 2H), 3.13 (quintet of doublets, J = 8.7, 2.6 Hz, 1H), 2.81–2.66 (m, 2H), 2.65–2.52 (m, 2H) ppm.
19F NMR (376 MHz, CDCl
3) δ – 82.4 (d, J = 192 Hz, 1F), –97.5 (d, J = 192 Hz, 1F) ppm.
13C NMR (100 MHz, CDCl
3) δ 206.5 (dd [app. t], J = 1.8 Hz), 148.2, 147.1, 126.9, 122.7, 118.5 (dd, J = 284, 268 Hz), 109.8, 108.8, 101.3, 48.4 (d, J = 1.1 Hz), 38.0 (dd [app. t], J = 24.2 Hz), 32.2 (dd, J = 13.5, 4.5 Hz) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3,3-difluorocyclobutyl)-N-methylethanamine (UWA-147, GAP-119, “Compound 95A”)
[00301] According to General Procedure A; ketone K95 (128 mg, 0.503 mmol) was reacted for 40 h to afford amine 95A as a colourless oil (121 mg, 89%).
1H NMR (400 MHz, CDCl
3) δ 6.74 (d, J = 7.8 Hz, 1H), 6.64 (d, J = 1.6 Hz, 1H), 6.59 (dd, J = 7.8, 1.7 Hz, 1H), 5.94 (s, 2H), 2.68–2.47 (m, 5H), 2.43–2.31 (m, 1H), 2.39 (s, 3H), 2.30–2.17 (m, 1H), 2.13–2.00 (m, 1H) ppm.
19F NMR (376 MHz, CDCl
3) δ –81.5 (d, J = 192 Hz, 1F), –98.3 (d, J = 192 Hz, 1F) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.9, 146.3, 132.1, 122.3, 119.9 (dd, J = 284, 269 Hz), 109.6, 108.5, 101.1, 65.1 (dd, J = 2.6, 2.0 Hz), 39.2 (dd, J = 22.9, 21.1 Hz), 38.2 (dd, J = 23.2, 21.4 Hz), 37.3, 34.4, 27.7 (dd, J = 13.6, 4.2 Hz) ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
14H
18F
2NO
2 + 270.1300; found, 270.1297. [00302] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as colourless granules.
1H NMR (400 MHz, CDCl
3) δ 9.72 (br s, 1H), 9.58 (br s, 1H), 6.79–6.72 (m, 3H), 5.97 (s, 2H), 3.34–3.21 (m, 2H), 2.95–2.72 (m, 3H), 2.60 (dd [app. t], J = 5.6 Hz, 3H), 2.59–2.42 (m, 2H), 2.26–2.12 (m, 1H) ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3,3-dimethylcyclobutyl)ethanone (“Ketone K96”)
[00303] A stirred solution of 3,3-dimethylcyclobutanecarboxylic acid (448 mg, 3.49 mmol) in PhMe (3.5 mL) was treated with oxalyl chloride (0.31 mL, 3.6 mmol) followed by two drops of DMF. The resulting solution was stirred at room temperature under N
2 for 2 h. Concurrently, and in a separate flask, a 1.0 M solution of LiHMDS in THF (7.0 mL, 7.0 mmol) was added to a stirred solution of methyl homopiperonylate (615 mg, 3.17 mmol) in anhydrous THF (9.5 mL) at –78 °C under N
2. This solution was stirred at –78 °C for 1.5 h before being treated dropwise via syringe with the PhMe solution of in situ generated acid chloride. The reaction mixture was warmed gradually to room temperature overnight, quenched with 0.5 M HCl (80 mL) and extracted with CH
2Cl
2 (3 × 40 mL). The extract was washed with brine (40 mL), dried and evaporated to give a yellow oil (1.11 g), which was dissolved 9:1 DMSO/water (12 mL) and treated with NaCl (838 mg, 14.3 mmol). The resulting mixture was degassed and stirred at 140 °C under N
2 for 18 h. The reaction mixture was cooled to room temperature, diluted with water (100 mL) and extracted with CH
2Cl
2 (3 × 50 mL). The extract was washed with brine (2 × 50 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:49 EtOAc/hexanes → 1:19 EtOAc/hexanes afforded ketone K96 as a colourless oil (629 mg, 81%).
1H NMR (400 MHz, CDCl
3) δ 6.75 (d, J = 7.9 Hz, 1H), 6.67 (d, J = 1.5 Hz, 1H), 6.62 (dd, J = 7.9, 1.7 Hz, 1H), 5.94 (s, 2H), 3.54 (s, 2H), 3.23 (quintet, J = 8.9 Hz, 1H), 2.03–1.96 (m, 2H), 1.87–1.80 (m, 2H), 1.14 (s, 3H), 1.03 (s, 3H) ppm.
13C NMR (100 MHz, CDCl
3) δ 209.9, 147.9, 146.7, 128.2, 122.7, 110.0, 108.5, 101.1, 47.5, 38.2, 37.1, 31.5, 30.1, 28.8 ppm. 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3,3-dimethylcyclobutyl)-N-methylethanamine (UWA-148, GAP-133, “Compound 96A”)
According to General Procedure A; ketone K96 (124 mg, 0.503 mmol) was reacted for 24 h to afford amine 96A as a colourless oil (90 mg, 69%).
1H NMR (400 MHz, CDCl
3) δ 6.73 (d, J = 7.8 Hz, 1H), 6.67 (d, J = 1.6 Hz, 1H), 6.61 (dd, J = 7.8, 1.6 Hz, 1H), 5.93 (s, 2H), 2.62 (dd, J = 13.5, 4.3 Hz, 1H), 2.51 (ddd, J = 9.0, 7.5, 4.3 Hz, 1H), 2.39 (dd, J = 13.5, 7.5 Hz, 1H), 2.35 (s, 3H), 2.22–2.10 (m, 1H), 1.90–1.83 (m, 1H), 1.80–1.72 (m, 1H), 1.58 (dd [app. t], J = 9.9 Hz, 1H), 1.48 (dd [app. t], J = 10.0 Hz, 1H), 1.13 (s, 3H), 1.03 (s, 3H) ppm.
13C NMR (100 MHz, CDCl
3) δ 147.7, 145.9, 133.4, 122.3, 109.7, 108.2, 100.9, 67.3, 40.1, 39.1, 37.4, 34.8, 33.2, 31.6, 31.2, 28.5 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
16H
24NO
2 + 262.1802; found, 262.1799.
[00304] The free base was converted to the crude hydrochloride and was recrystallised from PhMe as colourless microneedles.
1H NMR (400 MHz, CDCl
3) δ 9.34 (br s, 1H), 9.20 (br s, 1H), 6.80–6.73 (m, 3H), 5.95 (s, 2H), 3.20–3.08 (m, 2H), 2.88–2.80 (m, 1H), 2.71–2.58 (m, 1H), 2.54 (dd [app. t], J = 5.6 Hz, 3H), 2.16–2.07 (m, 1H), 1.83 (dd, J = 11.1, 9.6 Hz, 1H), 1.76–1.69 (m, 1H), 1.41 (dd, J = 11.0, 9.5 Hz, 1H), 1.13 (s, 3H), 1.04 (s, 3H) ppm. tert-Butyl (1-(benzo[d][1,3]dioxol-5-yl)but-3-yn-2-yl)(methyl)carbamate (“Carbamate CX97”)
[00305] A stirred solution of UWA-017•HCl (“Compound 3A•HCl”; 50 mg, 0.21 mmol) in water (1.6 mL) was treated with Na
2CO
3 (80 mg, 0.75 mmol) followed by di-tert-butyl dicarbonate (164 mg, 0.751 mmol). The resulting mixture was stirred at room temperature for 48 h, diluted with water (15 mL) and extracted with CH
2Cl
2 (3 × 15 mL). The extract was washed with brine (15 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with hexanes → 1:9 EtOAc/hexanes afforded carbamate CX97 as a colourless oil (61 mg, 96%).
1H NMR (400 MHz, CDCl
3; rotameric mixture) δ 6.73 (d, J = 7.8 Hz, 1H), 6.72–6.60 (br m, 2H), 5.92 (q [AB], J = 1.3 Hz, 2H), 5.19 and 5.00 (2 × br s, 1H, rotamers), 2.91–2.79 (br m, 5H), 2.36 and 2.32 (2 × br s, 1H, rotamers), 1.40 and 1.34 (2 × br s, 9H, rotamers) ppm.
13C NMR (100 MHz, CDCl
3; rotameric mixture) δ 154.6 (br), 147.6, 146.6, 130.8, 122.5, 109.9, 108.3, 101.0, 81.6 (br), 80.2, 73.4, 50.1 and 49.2 (2 × br, rotamers), 40.1 and 39.7 (2 × br, rotamers), 29.9 and 29.2 (2 × br, rotamers), 28.4 ppm. tert-Butyl (2-(benzo[d][1,3]dioxol-5-yl)-1-(1H-1,2,3-triazol-4-yl)ethyl)(methyl)carbamate (“Carbamate CY97”)
[00306] CuI (4.0 mg, 0.021 mmol, 12 mol%), iPr
2NEt (50 μL, 0.29 mmol) and TMSN3 (45 μL, 0.34 mmol) were added to a stirred solution of carbamate CX97 (55 mg, 0.18 mmol) in 9:1 DMF/MeOH (2.0 mL). The reaction vessel was flushed with argon, sealed and the reaction mixture stirred at 80 °C for 20 h. The resulting mixture was cooled to room temperature, diluted with water (20 mL) and extracted with CHCl
3 (3 × 20 mL). The extract was washed with
saturated NH
4Cl (2 × 20 mL), dried and evaporated and the crude residue was subjected to flash chromatography. Gradient elution with 1:4 EtOAc/hexanes → 1:39:60 NEt
3/EtOAc/hexanes afforded carbamate CY97 as a pale yellow oil (49 mg, 77%).
1H NMR (400 MHz, CDCl
3, rotameric mixture) δ 7.63 and 7.60 (2 × br s, 1H, rotamers), 6.74–6.63 (br m, 3H), 5.90 (s, 2H), 5.66 and 5.55 (2 × br s, 1H, rotamers), 3.37–3.25 (br m, 1H), 3.24–3.05 (br m, 1H), 2.69 (s, 3H), 1.39 and 1.35 (2 × br s, 9H, rotamers) ppm.
13C NMR (100 MHz, CDCl
3) δ 156.2 and 155.6 (2 × br, rotamers), 147.7, 146.3, 131.6 (br), 131.3, 122.2, 109.6, 108.4, 101.0, 80.4, 53.8 and 52.4 (2 × br, rotamers), 36.9, 30.4 and 29.3 (2 × br, rotamers), 28.4 ppm. Note: A
13C signal for C4′′ was not observed due to rotameric and tautomeric broadening. 2-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-1-(1H-1,2,3-triazol-4-yl)ethanamine (UWA-149, GAP- 168, “Compound 97A”)
A solution of carbamate CY97 (14 mg, 41 μmol) in MeOH (0.6 mL) was treated with 4.0 M HCl in dioxane (0.15 mL, 0.60 mmol) and stirred at 40 °C for 3 h. The resulting solution was cooled to room temperature and evaporated and the residue was triturated with Et
2O to afford the dihydrochloride 97A•2HCl as a beige solid (12 mg, 93%).
1H NMR (600 MHz, CD
3OD) δ 7.75 (s, 1H), 6.70 (d, J = 7.9 Hz, 1H), 6.64 (d, J = 1.7 Hz, 1H), 6.58 (dd, J = 7.9, 1.7 Hz, 1H), 5.90 (q [AB], J = 1.3 Hz, 2H), 4.67 (dd, J = 9.6, 5.6 Hz, 1H), 3.34 (dd, J = 13.4, 5.6 Hz, 1H), 3.22 (dd, J = 13.4, 9.8 Hz, 1H), 2.60 (s, 3H) ppm. [00307] A sample of the dihydrochloride 97A•2HCl was dissolved in saturated NaHCO
3 and extracted with EtOAc. The extract was dried and evaporated to afford amine 97A as a colourless solid.
1H NMR (600 MHz, CD
3OD) δ 7.58 (br s, 1H), 6.65 (d, J = 7.9 Hz, 1H), 6.57 (d, J = 1.3 Hz, 1H), 6.53 (dd, J = 7.9, 1.2 Hz, 1H), 5.86 (q [AB], J = 1.4 Hz, 2H), 4.03 (dd, J = 8.1, 6.6 Hz, 1H), 3.05 (dd, J = 13.3, 6.4 Hz, 1H), 2.96 (br dd, J = 13.0, 8.0 Hz, 1H), 2.25 (s, 3H) ppm. 1
3C NMR (150 MHz, CD
3OD) δ 149.0, 147.6, 146.9 (br), 132.7, 129.3 (br), 123.4, 110.4, 109.0, 102.1, 59.1, 42.5, 33.9 ppm. HRMS (ESI+) m/z [M + H]
+ calcd for C
12H
15N
4O
2 + 247.1190; found, 247.1188. Biological Activity Screening Tests [00308] Particularly preferred compounds of the present invention were subjected to the following biological screening tests to determine their activity profiles.
Serotonin Transporter (SERT) activity [00309] The Na
+/Cl- dependent neurotransporters, which represent a gene superfamily, are essential for controlling neurotransmitter function. Serotonin's function is terminated in part by the plasma-membrane norepinephrine transporter (SERT), which transports serotonin into presynaptic serotonergic neurones. Psychostimulants and antidepressants have a high affinity for monoamine transporters like SERT. These drugs increase extracellular neurotransmitter concentrations in both the central and peripheral nervous systems by inhibiting transporters and thereby impeding neuronal uptake, which contributes to their behavioural and autonomic effects. [00310] The screening procedure follows that reported in the literature,
11(a),(b) whereby a modified Tris-HCl buffer pH 7.4, human recombinant serotonin transporter expressed in human HEK-293 cells is employed. For 60 minutes at 25°C, a 9 µg aliquot is incubated with 0.4 nM [
3H]Paroxetine. In the presence of 10 µM imipramine (as an exemplary compound), non-specific binding is estimated. The transporters are filtered and washed, and the filters are counted to determine [
3H]Paroxetine specifically bound. Compounds were screened at a concentration of 10 µM. A standard reference agent used for this screening test is Fluoxetine, which has IC50 (nM) = 8.6, Ki (nM) = 1.4, and nH = 0.9. Dopamine Transporter (DAT) activity [00311] The Na
+/Cl- dependent neurotransporters, which represent a gene superfamily, are essential for controlling neurotransmitter function. Dopamine's function is terminated in part by the plasma-membrane norepinephrine transporter (DAT), which transports dopamine into presynaptic dopaminergic neurones. Psychostimulants and antidepressants have a high affinity for monoamine transporters like DAT. These drugs increase extracellular neurotransmitter concentrations in both the central and peripheral nervous systems by inhibiting transporters and thereby impeding neuronal uptake, which contributes to their behavioural and autonomic effects. [00312] The screening procedure follows that reported in the literature,
12(a),(b) whereby human recombinant dopamine transporters expressed in CHO-S cells are used in modified Tris- HCl buffer pH 7.4. A 0.4 μg aliquot is incubated with 0.15 nM [
125I]RTI-55 for 3 hours at 4°C. Non-specific binding is estimated in the presence of 10 μM nomifensine (as an exemplary compound). Transporters are filtered and washed, the filters are then counted to determine [
125I]RTI-55 specifically bound. Compounds are screened at 10 μM. A standard reference agent used for this screening test is GBR-12909 (1-[2[bis(4-fluorophenyl)methoxy]ethyl]-4-[3- phenylpropyl]piperazine dihydrochloride), which has IC50 (nM) = 1.7, Ki (nM) = 1.3, and nH = 0.9. Norepinephrine Transporter (NET) activity
[00313] The Na
+/Cl- dependent neurotransporters, which represent a gene superfamily, are essential for controlling neurotransmitter function. Norepinephrine's function is terminated in part by the plasma-membrane norepinephrine transporter (NET), which transports norepinephrine into presynaptic noradrenergic neurones. Psychostimulants and antidepressants have a high affinity for monoamine transporters like NET. These drugs increase extracellular neurotransmitter concentrations in both the central and peripheral nervous systems by inhibiting transporters and thereby impeding neuronal uptake, which contributes to their behavioural and autonomic effects. [00314] The screening procedure follows that reported in the literature,
13 whereby human recombinant norepinephrine transporters expressed in dog kidney MDCK cells are used in modified Tris-HCl buffer pH 7.4. A 40 μg aliquot is incubated with 0.2 nM [
125I]RTI-55 for 3 hours at 4°C. Non-specific binding is estimated in the presence of 10 μM desipramine (as an exemplary compound). Transporters are filtered and washed, the filters are then counted to determine [
125I]RTI-55 specifically bound. Compounds are screened at 10 μM. A standard reference agent used for this screening test is Desipramine, which has IC
50 (nM) = 0.93, Ki (nM) = 0.92, and nH = 0.6. Monoamine Oxidase A (MAO-A) activity [00315] Monoamine Oxidase (MAO, E.C.1.4.3.4) catalyses the removal of an amine group via oxidative deamination from a variety of substrates including endogenous substances and neurotransmitters (norepinephrine, epinephrine, dopamine, tyramine, serotonin) and many amine drugs. MAO provides an important protective mechanism against exogenous, biologically active amines. There are at least two types of MAO which display varying preferences for substrates and differing sensitivities to selective inhibitors. Relatively selective inhibitors of MAO-A (e.g. Clorgyline) are correlated with efficacy in the treatment of major depression, and relatively selective MAO-B inhibitors are correlated with beneficial effects on Parkinson′s disease and dyskinesia. [00316] The screening procedure follows that reported in the literature,
14(a),(b) whereby Human recombinant MAO-A expressed in insect cells is used. Test compound and/or vehicle is preincubated with 4.2 μg/ml enzyme in phosphate buffer pH 7.4 for 15 minutes at 37
oC. The reaction is initiated by addition of 50 μM Kynuramine (as substrate) for another 60 minute incubation period and terminated by further addition of 1.2 N NaOH. Determination of the amount of 4-hydroxyquinoline formed is read spectrofluorimetrically at 325 nm/465 nm. Compounds are screened at 10 μM. A standard reference agent used for this screening test is Clorgyline, which has IC50 (µM) = 0.0022.
Serotonin Receptor (5-HT2B) activity [00317] Evaluation of the agonist and antagonist activities of compounds at the human 5- HT2B receptor expressed in transfected CHO cells, is determined by measuring their effects on IP1 production using the Homogeneous Time Resolved Fluorescence (HTRF) detection method. [00318] The screening procedure follows that reported in the literature,
15 whereby the CHO cells are suspended in a buffer containing 10 mM Hepes/NaOH (pH 7.4), 4.2 mM KCl, 146 mM NaCl, 1 mM CaCl
2, 0.5 mM MgCl
2, 5.5 mM glucose and 50 mM LiCl, then distributed in microplates at a density of about 2.10
4 cells/well and incubated for 30 min at 37°C in the presence of buffer (basal control), test compound, reference agonist or reference antagonist. [00319] For stimulated control measurement, separate assay wells contain 1 μM 5-HT. For basal control measurements, separate assay wells do not contain 5-HT. [00320] Following incubation, the cells are lysed and the fluorescence acceptor (D2- labeled IP1) and fluorescence donor (anti-IP1 antibody labelled with europium cryptate) are added. After 60 min at room temperature, the fluorescence transfer is measured at λex=337 nm and λem=620 and 665 nm using a microplate reader (Envision, Perkin Elmer). The IP1 concentration is determined by dividing the signal measured at 665 nm by that measured at 620 nm (ratio). [00321] The agonist results are expressed as a percent of the control response to 1 μM 5-HT. The antagonist results are expressed as a percent inhibition of the control response to 30 nM 5-HT. [00322] The standard reference agonist is 5-HT (serotonin), which is tested in each experiment at several concentrations to generate a concentration-response curve from which its EC50 value is calculated. [00323] The standard reference antagonist is SB 206553 (5-methyl-1-(3- pyridylcarbamoyl)-1,2,3,5-tetrahydropyrrolo[2,3-f]indole), which is tested in each experiment at several concentrations to generate a concentration-response curve from which its IC
50 value is calculated. Human Potassium Channel (HERG) activity [00324] The HERG potassium channel is mediates the delayed rectifier current (IKr) underlying cardiac repolarization. Due to either genetic defects in its pore-forming subunit or adverse drug effects, decreased HERG activity lengthens the QT interval and can lead to the
potentially lethal ventricular arrhythmia Torsades de pointes. The implication of (I
Kr) in cardiac arrhythmias and in anti-arrhythmic/pro-arrhythmic actions of drugs has driven intensive research interests in its structure-function relationship, the linkage between LQT-associated mutations and changes in channel function, and the mechanism of drug actions. [00325] The screening procedure for HERG binding follows that reported in the literature,
16(a),(b) whereby Human recombinant potassium channel HERG expressed in human HEK-293 cells are used in modified Tris-HCl buffer pH 7.4. A 7.5 μg aliquot is incubated with 3 nM [
3H]Dofetilide for 60 minutes at 25oC. Non-specific binding is estimated in the presence of 10 μM Dofetilide. Channel proteins are filtered and washed, the filters are then counted to determine [
3H]Dofetilide specifically bound. Compounds are screened at 10 μM. A standard reference agent used in this screen is Dofetilide, which has IC
50 (nM) = 2.5, Ki (nM) = 1.7 and nH = 1.0. DAT / NET / SERT Inhibition Results [00326] The results of the screening tests for DAT, NET and SERT are presented in the table below, as (10 uM) concentration % displacement of radioligand by the MDMA analogue compounds at the three monoamine transporters, as a measure of affinity (shading) and % inhibition (values) of the compounds to the transporters. In addition to compounds of the invention, the following known compounds were screened for comparison; MDA = 3,4- Methylenedioxyamphetamine; MDDM = 3,4-Methylenedioxy-N,N-dimethylamphetamine; MDMA = racemic 3,4-methylenedioxy-N-methylamphetamine; R-MDMA = enantiomerically pure 3,4- methylenedioxy-N-methylamphetamine of absolute configuration Rectus; S-MDMA = enantiomerically pure 3,4-methylenedioxy-N-methylamphetamine of absolute configuration Sinister:


[00327] Dose-response data for selected compounds of embodiments of the invention, compared to known compounds (MDA = 3,4-Methylenedioxyamphetamine; MDDM = 3,4- Methylenedioxy-N,N-dimethylamphetamine; MDMA = racemic 3,4-methylenedioxy-N- methylamphetamine; R-MDMA = enantiomerically pure 3,4-methylenedioxy-N- methylamphetamine of absolute configuration Rectus; S-MDMA = enantiomerically pure 3,4- methylenedioxy-N-methylamphetamine of absolute configuration Sinister) are presented in the table below:

GENERAL [00328] Each document, reference, patent application or patent cited in this text is expressly incorporated herein in their entirety by reference, which means that it should be read and considered by the reader as part of this text. That the document, reference, patent application or patent cited in this text is not repeated in this text is merely for reasons of conciseness. [00329] It should be appreciated that throughout this specification, any reference to any prior publication, including prior patent publications and non-patent publications, is not an acknowledgment or admission that any of the material contained within the prior publication referred to was part of the common general knowledge as at the priority date of the application. [00330] Any manufacturer’s instructions, descriptions, product specifications, and product sheets for any products mentioned herein or in any document incorporated by reference herein,
are hereby incorporated herein by reference, and may be employed in the practice of the invention. [00331] The invention described herein may include one or more range of values (eg. size, displacement and field strength etc). A range of values will be understood to include all values within the range, including the values defining the range, and values adjacent to the range which lead to the same or substantially the same outcome as the values immediately adjacent to that value which defines the boundary to the range. [00332] The present invention is not to be limited in scope by any of the specific embodiments described herein. These embodiments are intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein. [00333] Those skilled in the art will appreciate that the invention described herein is susceptible to variations and modifications other than those specifically described. The invention includes all such variation and modifications. The invention also includes all of the steps, features, formulations and compounds referred to or indicated in the specification, individually or collectively and any and all combinations or any two or more of the steps or features. REFERENCES 1. Zhang Y. et al, Organic & Biomolecular Chemistry, 2021, 19, 5772-5776. 2. Lewis K. A medicinal chemistry investigation of 3,4-Methylenedioxymethamphetamine (MDMA). Doctoral Thesis, University of Western Australia, 2011. 3. Cloonan, S. M.; Keating, J. J.; Butler, S. G.; Knox, A. J. S.; Jorgensen, A. M.; Peters, G. H.; Rai, D.; Corrigan, D.; Lloyd, D. G.; Williams, D. C.; Meegan, M. J., Synthesis and serotonin transporter activity of sulphur-substituted α-alkyl phenethylamines as a new class of anticancer agents. Eur. J. Med. Chem.2009, 44 (12), 4862-4888. 4. Gandy, M. N.; McIldowie, M.; Lewis, K.; Wasik, A. M.; Salomonczyk, D.; Wagg, K.; Millar, Z. A.; Tindiglia, D.; Huot, P.; Johnston, T.; Thiele, S.; Nguyen, B.; Barnes, N. M.; Brotchie, J. M.; Martin-Iverson, M. T.; Nash, J.; Gordon, J.; Piggott, M. J., Redesigning the designer drug ecstasy: non-psychoactive MDMA analogues exhibiting Burkitt's lymphoma cytotoxicity. MedChemComm 2010, 1 (4), 287-293.
5. Gillaspy, M.; Lefker, B. A.; Hada, W. A.; Hoover, D. J., A simple method for the formation of cyclopropylamines: the first synthesis of tricyclopropylamine. Tetrahedron Lett.1995, 36 (41), 7399-402. 6. Li, G.; Zhou, H.; Jiang, Y.; Keim, H.; Topiol, S. W.; Poda, S. B.; Ren, Y.; Chandrasena, G.; Doller, D., Design and synthesis of 4-arylpiperidinyl amide and N-arylpiperidin-3-yl- cyclopropanecarboxamide derivatives as novel melatonin receptor ligands. Bioorg. Med. Chem. Lett.2011, 21 (4), 1236-1242. 7. Burger, A.; Zimmerman, S. E.; Ariens, E. J., 1-Ethynylphenethylamine. J. Med. Chem. 1966, 9 (4), 469-70. 8. Palmer, M. J.; Kenny, J. A.; Walsgrove, T.; Kawamoto, A. M.; Wills, M., Asymmetric transfer hydrogenation of ketones using amino alcohol and monotosylated diamine derivatives of indane. J. Chem. Soc., Perkin Trans.12002, (3), 416-427. 9. Li, S. W.; Spaziano, V. T.; Burke, W. J., Synthesis of a biochemically important aldehyde, 3,4-dihydroxyphenylacetaldehyde. Bioorg. Chem.1998, 26 (1), 45-50. 10. Palmer, M. J.; Kenny, J. A.; Walsgrove, T.; Kawamoto, A. M.; Wills, M., Asymmetric transfer hydrogenation of ketones using amino alcohol and monotosylated diamine derivatives of indane. J. Chem. Soc., Perkin Trans.12002, (3), 416-427. 11. (a) Shearman, L. P., McReynolds, A. M., Zhou, F. C. and Meyer, J. S. Relationship between [125I]RTI-55-labeled cocaine binding sites and the serotonin transporter in rat placenta. Am. J. Physiol.275(6 Pt 1): C1621-1629, 1998. (b) Wolf, W. A. and Kuhn, D. M. Role of essential sulfhydryl groups in drug interactions at the neuronal 5-HT transporter. Differences between amphetamines and 5-HT uptake inhibitors. J. Biol. Chem.267(29): 20820-20825, 1992. 12. (a) Giros, B. and Caron, M. G. Molecular characterization of the dopamine transporter. Trends. Pharmacol. Sci.14(2): 43-49, 1993. (b) Gu, H., Wal, S. C. and Rudnick, G. Stable expression of biogenic amine transporters reveals differences in inhibitor sensitivity, kinetics and ion dependence. J. Biol. Chem.269(10): 7124-7130, 1994. 13. Galli, A., DeFelice, L. J., Duke, B.-J., Moore, K. R. and Blakely, R. D. Sodium- dependent norepinephrine-induced currents in norepinephrine-transporter-transfected
HEK-293 cells blocked by cocaine and antidepressants. J. Exp. Biol.198(Pt 10): 2197- 2212, 1995. 14. (a) Urban P, Andersen JK, Hsu HP and Pompon D. Comparative membrane locations and activities of human monoamine oxidases expressed in yeast. FEBS Lett.286(1-2): 142-146, 1991. (b) Youdim MB and Finberg JP. New directions in monoamine oxidase A and B selective inhibitors and substrates. Biochem Pharmacol.41(2): 155-162, 1991. 15. Porter, R.H.P., Benwell, K.R., Lamb, H., Malcolm, C.S., Allen, N.F., Revell, D.F., Adams, D.R. and Sheardown, M.J., Functional characterization of agonists at recombinant human 5-HT2a, 5HT2b and 5-HT2c receptors in CHO-K1 cells, Brit. J. Pharmacol., 128: 13, 1999. 16. (a) Huang XP, Mangano T, Hufeisen S, Setola V and Roth BL. Identification of human Ether-à-go-go related gene modulators by three screening platforms in an academic drug-discovery setting. Assay Drug Dev Technol 8(6): 727-742, 2010. (b) Finlayson K, Turnbull L, January CT, Sharkey J, Kelly JS. [
3H]dofetilide binding to HERG transfected membranes: a potential high throughput preclinical screen. European Journal of Pharmacology.430(1): 147-148, 2001. 17. Russell S. J. MDMA Analogues as Lead Compounds for Burkitt’s Lymphoma Drug Discovery. Doctoral Thesis (Part I), University of Western Australia, 2016. 18. Beaufort-Droal, V, et al., Preparation of non-racemic single-stereocentre α-aminonitriles and a study of their fate in Bruylants reactions. Tetrahedron.62.11948-11954, 2006.