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EP1963310A2 - Procedes de preparation d'un inhibiteur du vegf-r - Google Patents

Procedes de preparation d'un inhibiteur du vegf-r

Info

Publication number
EP1963310A2
EP1963310A2 EP06820962A EP06820962A EP1963310A2 EP 1963310 A2 EP1963310 A2 EP 1963310A2 EP 06820962 A EP06820962 A EP 06820962A EP 06820962 A EP06820962 A EP 06820962A EP 1963310 A2 EP1963310 A2 EP 1963310A2
Authority
EP
European Patent Office
Prior art keywords
compound
formula
alkenyl
alkynyl
alkyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP06820962A
Other languages
German (de)
English (en)
Inventor
Narubumi Fred Makino
Wolfgang Reinhard Ludwig Notz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pfizer Products Inc
Original Assignee
Pfizer Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pfizer Products Inc filed Critical Pfizer Products Inc
Publication of EP1963310A2 publication Critical patent/EP1963310A2/fr
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents

Definitions

  • the present invention relates to methods for preparing a VEGF-R inhibitor, and to intermediates thereof.
  • This compound is a receptor protein kinase inhibitor and represents a synthetic, small molecule inhibitor of angiogenic receptor signaling.
  • the present invention relates to methods of preparing Compound 7, as well as pharmaceutically acceptable salts and intermediate compounds thereof. Such compounds are useful for the treatment of cancer and other diseases associated with angiogenesis or cellular proliferation mediated by protein kinases.
  • the present invention relates to methods of preparing a compound of formula 7, and intermediates thereof.
  • the present invention relates to a method of preparing a compound of formula 7,
  • X is any suitable leaving group, to form the compound of formula 7.
  • X is halogen, NO 2 or -OSO 2 R 1 wherein R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 6 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 6 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • the reaction is carried out under conditions comprising a base.
  • the base is selected from the group consisting of Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , KHCO 3 , NaH, an amine base, an alkoxide base, a hydroxide base, and an organometallic reagent.
  • X is Cl and the reaction is carried out at a temperature of 90 to 11O 0 C.
  • Another aspect of the present invention is a method of preparing a compound of formula 4,
  • X and Y are each any suitable leaving group, to form a compound of formula 4.
  • the compound of formula 30 is 2-(4-Morpholinyl)-ethyl chloride hydrochloride.
  • X and Y are each independently halogen, NO 2 , or -OSO 2 R 1 , wherein R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • X is Cl and Y is Cl.
  • the reaction is carried out in the presence of a first base at a temperature of 70 to 9O 0 C, followed by the addition of an acid at a temperature of 20 to 3O 0 C, followed by the addition of a second base at a temperature of 20 to 3O 0 C.
  • the first base can be selected from the group consisting of Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , KHCO 3 , NaH, an amine base, an alkoxide base, and a hydroxide base.
  • the base can be NaOtBu or KOtBu.
  • the acid is any acid that allows for pH adjustment to a pH of 3 or less.
  • the acid can be selected from the group consisting of HCI, HBr, H 2 SO 4 , and H 3 PO 4 .
  • the second base is any base that allows for pH adjustment to a pH of 12 or greater.
  • the second base can be NaOH or KOH.
  • the present invention also relates to a method of preparing a compound of formula 3
  • the method comprising the steps of; a) treating a compound of formula 2 with a suitable deprotecting agent; followed by
  • X is any suitable leaving group
  • R is (Ci to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to Ci 4 ) aryl group.
  • X is halogen, NO 2 or -OSO 2 R 1 , wherein R 1 is (C 1 to C 6 ) alkyl,
  • the deprotecting agent can be BBr 3 , BCI 3 , TMSCI, TMSBr, TMSI, HBr, HI, thioacetic acid, thioglycolic acid, or methanesulfonic acid.
  • the base can be any base that allows for pH adjustment to a pH of 11 or greater.
  • the base can be NaOH or KOH.
  • the acid is any acid that allows for pH adjustment to a pH of 7.
  • the acid is HCI, HBr, H 2 SO 4 , or H 3 PO 4 .
  • the present invention further relates to a method of preparing a compound of formula 6
  • the carboxylic acid activating agent is CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, or PyBOP.
  • the method further comprises the addition of a catalyst, for example pyridine or DMAP.
  • the invention further relates to a method of preparing a compound of formula 6
  • R 1 is acyl, -SO 2 R 2 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl, wherein R 2 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C-
  • R 1 is -CH 3
  • the reaction is carried out at a temperature of 55 to 75 0 C
  • the deprotection agent is MSA
  • the scavenger is me
  • the invention further relates to a method of preparing a compound of formula 6
  • R 1 is acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl
  • R 2 is H, (C 1 to C 6 ) alkyl, (Q 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • R 1 is -CH 3 , or -CH 2 -phenyl
  • the reaction is carried out at a temperature of 55 to 75 0 C
  • the deprotection agent is an acid such as MSA and the scavenger is methionine.
  • the present invention further relates to a method of preparing a compound of formula 18
  • R 1 is acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl
  • R 2 is H, (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl
  • R 3 is (Ci to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to Ci 4 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • R 1 is -CH 3
  • R 2 is H
  • the reaction further comprises the addition of a suitable carboxylic acid activating agent.
  • the carboxylic activating agent is selected from the group consisting of CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, and PyBOP.
  • R 1 is -CH 3
  • R 2 is -CH 3
  • the catalyst is NaCN.
  • the reaction is carried out at a temperature of 55 to 75 0 C.
  • R 1 is - CH 3
  • R 2 is -CH 2 CH 3
  • the catalyst is NaCN.
  • the present invention further relates to a method of preparing a compound of formula 24
  • R 1 is acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 2 is H, (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to , C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • the agent that enables rearrangement dehydration is an acid.
  • the acid is HCI, R 1 is -CH 3 , and R 2 is H.
  • the acid is MSA, the solvent is MeOH, R 1 is -CH 3 , and R 2 is -CH 3 .
  • the acid is MSA, the solvent is EtOH, R 1 is -CH 3 , and R 2 is -CH 2 CH 3 .
  • the present invention further relates to a method of preparing a compound of formula 14
  • R 1 is acyl, -SO 2 R 2 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl; and R 2 is (Ci to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • the base is selected from the group consisting of alkoxides, amides, NaH, and organometallic reagents.
  • R 1 is -CH 3 and the base is BuLi, LDA, LHMDS, NaHMDS, or KHMDS.
  • the acylating agent is an anhydride, an acid halide, or an ester of acetic acid.
  • the acylating agent is ethyl acetate, acetyl chloride, or acetic anhydride.
  • the present invention also relates to a method of preparing a compound of formula 13
  • R 1 is acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 2 is H or a cationic counterion;
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • R 1 is -CH 3
  • R 2 is H 2 NCy 2
  • the activation agent is selected from the group consisting of CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, and PyBOP
  • the base is selected from the group consisting of an amine, Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , and KHCO 3
  • R 2 is H
  • the method further comprises the addition of a suitable nucleophile.
  • the step of treating a compound of formula 20 with the carboxylic acid activation agent, the base, and the nucleophile is carried out by (i) treating the compound of formula 20 with the carboxylic acid activation agent, the base, and the nucleophile to form an intermediate compound of formula 19;
  • R 1 is acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 4 is (C-i to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group, and (ii) treating the intermediate compound of formula 19 with a base to form the compound of formula ⁇ 3.
  • R 1 is -CH 3
  • the carboxylic acid activation agent is selected from the group consisting of CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI 1 and PyBOP
  • the base in steps (i) and (ii) is independently selected from the group consisting of an amine, Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , and KHCO 3
  • the nucleophile is an alcohol or an amine.
  • the carboxylic acid activation agent is SOCI 2
  • the base is pyridine
  • the nucleophile is MeOH, EtOH, or methylamine.
  • the present invention also relates to a method of preparing a compound of formula 20
  • R 1 is H, acyl, -SO 2 R 3 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 2 is H or a cationic counterion;
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • R 1 is -CH 3
  • R 2 is H
  • the sulfur source is S 8
  • the amine is NH 3 , piperidine, or morpholine.
  • step a) is carried out at a temperature of 120 to 14O 0 C.
  • the base is any base that allows for pH adjustment to a pH of 12 or greater.
  • the base can be NaOH or KOH.
  • the acid is any acid that allows for pH adjustment to a pH of 2 or less.
  • the acid can be HCI, HBr, H 2 SO 4 , or H 3 PO 4 .
  • the present invention also relates to a compound of formula 20
  • R 1 is acyl, -SO 2 R 3 , (C-i to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl;
  • R 2 is H or a cationic counterion;
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group; or a salt or solvate thereof.
  • R 1 is -CH 3 and R 2 is H or NH 2 Cy 2 .
  • the present invention also relates to a compound of formula 13
  • R 1 is acyl, -SO 2 R 2 , (C-i to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 8 ) alkynyl; and R 2 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C M ) aryl group; or a salt or solvate thereof.
  • R 1 is -CH 3 .
  • the present invention further relates to a compound of formula 14
  • R 1 is acyl, -SO 2 R 2 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 6 ) alkynyl; and R 2 is (C 1 to C 6 ) alkyl, (C2 to C8) alkenyl, (C 2 to C 6 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to Ci 4 ) aryl group " ; or a salt or solvate thereof.
  • R 1 is -CH 3 .
  • the present invention further relates to a compound of formula 24
  • R 1 is H, acyl, -SO 2 R , (C 1 to C 6 ) alkyl, (C2 to C8) alkenyl, or (C 2 to C 6 ) alkynyl
  • R 2 is H, (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 6 ) alkynyl
  • R 3 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl; wherein any of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group; or a salt solvate thereof.
  • R 1 is -CH 3
  • R 2 is H, -CH
  • the present invention also relates to a compound of formula 18
  • R 1 is H, acyl, -SO 2 R 2 , (C 1 to C 6 ) alkyl, (C2 to C8) alkenyl, or (C 2 to C 6 ) alkynyl;
  • R 2 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to Ci 4 ) aryl group; or a salt or solvate thereof.
  • R 1 is -CH 3 .
  • the present invention also relates to a compound of formula 4
  • X is any suitable leaving group; or a salt or solvate thereof.
  • X is halogen, NO 2 , or -OSO 2 R 1 wherein R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • X is Cl.
  • the present invention also relates to a compound of formula 2
  • X is any suitable leaving group; and R is H, (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl,
  • X is halogen, NO 2 , or
  • R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to
  • each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • X is Cl
  • R is -CH 3 or -CH 2 -phenyl.
  • the present invention also relates to a compound of formula 31 wherein: R is H, acyl, -SO 2 R 1 , (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, or (C 2 to C 6 ) alkynyl; and R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 8 ) alkynyl, or (C 6 to C 14 ) aryl, wherein each of said (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 8 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group; or a salt or solvate thereof.
  • treating refers to a chemical process or processes in which two or more reactants or chemical species are allowed to come into contact with each other to effect a chemical change or transformation. For example, when reactant A and reactant B are allowed to come into contact with each other to afford a new chemical compound(s) C, A is said to have been
  • protecting refers to a process in which a functional group in a chemical compound is selectively masked by a non-reactive functional group in order to allow a selective reaction(s) to occur elsewhere on said chemical compound.
  • protecting groups Such non-reactive functional groups are herein termed "protecting groups.”
  • hydroxyl protecting group refers to those groups that are capable of selectively masking the reactivity of a hydroxyl (-OH) group.
  • suitable protecting group refers to those protecting groups that are useful in the preparation of the compounds of the present invention. Such groups are generally able to be selectively introduced and removed using mild reaction conditions that do not interfere with other portions of the subject compounds.
  • Protecting groups that are suitable for use in the processes and methods of the present invention are known to those of ordinary skill in the art. The chemical properties of such protecting groups, methods for their introduction and their removal can be found, for example, in T. Greene and P.
  • deprotecting means to refer to the process of removing a protecting group, or agents that remove a protecting group, from a compound. Methods for deprotecting, including the appropriate conditions and reagents, are known to those of ordinary skill in the art.
  • solvate is intended to mean a pharmaceutically acceptable solvate form of a specified compound that retains the biological effectiveness of such compound.
  • solvates include, but are not limited to, compounds of the invention in combination with water, isopropanol, ethanol, methanol, dimethylsulfoxide (DMSO), ethyl acetate, acetic acid, ethanolamine, or mixtures thereof.
  • a "carboxylic acid activating agent” is anything suitable to activate a carboxylic acid for amide or ester formation.
  • Such agents are well known to those of skill in the art and include CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, and PyBOP.
  • a "scavenger” is a chemical compound or functional group that can accept another group that is being removed from a chemical compound.
  • a "R1 scavenger” is any chemical compound or functional group that forms an interaction with the R1 group that is being removed from a chemical compound. Such scavengers are well known to those of skill in the art.
  • an "agent that enables rearrangement dehydration” is any agent that facilitates rearrangement dehydration as part of a chemical reaction.
  • agents are well known to those of skill in the art and include acids such as HCI, H 2 SO 4 , and MSA.
  • a "leaving group” refers to a chemical functional group that generally allows a nucleophilic substitution reaction to take place at the atom to which it is attached.
  • the -Cl group is generally referred to as a leaving group because it allows nucleophilic substitution reactions to take place at the carbonyl carbon to which it is attached.
  • Suitable leaving groups are known to those of ordinary skill in the art and can include halides, aromatic heterocycles, cyano, amino groups (generally under acidic conditions), ammonium groups, alkoxide groups, carbonate groups, formates, and hydroxy groups that have been activated by reaction with compounds such as carbodiimides.
  • suitable leaving groups can include, but are not limited to halogen, NO 2 , and -OSO 2 R 1 , where R 1 is (C 1 to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, (C 2 to C 6 ) alkynyl, or (C 6 to C 14 ) aryl, and wherein each of said (C-i to C 6 ) alkyl, (C 2 to C 8 ) alkenyl, and (C 2 to C 6 ) alkynyl is optionally substituted with at least one (C 6 to C 14 ) aryl group.
  • an "acylating agent” is any chemical compound capable of delivering an acyl group in an acylation reaction.
  • acylating agents are well known to those of skill in the art and include anhydrides of carboxylic acids, acid halides, and esters.
  • (C 1 to C 6 ) alkyl means a saturated aliphatic hydrocarbon radical including straight chain and branched chain groups of 1 to 6 carbon atoms.
  • Examples of (C 1 to C 6 ) alkyl groups include methyl, ethyl, propyl, 2-propyl, n-butyl, /so-butyl, terf-butyl, pentyl, and the like.
  • (C 2 to C 8 ) alkenyl means an alkyl moiety comprising 2 to 8 carbons having at least one carbon-carbon double bond.
  • the carbon-carbon double bond in such a group may be anywhere along the 2 to 8 carbon chain that will result in a stable compound.
  • Such groups include both the E and Z isomers of said alkenyl moiety. Examples of such groups include, but are not limited to, ethenyl, propenyl, butenyl, ally!, and pentenyl.
  • (C 2 to C 8 ) alkynyl means an alkyl moiety comprising from 2 to 8 carbon atoms and having at least one carbon- carbon triple bond.
  • the carbon-carbon triple bond in such a group may be anywhere along the 2 to 8 carbon chain that will result in a stable compound. Examples of such groups include, but are not limited to, ethynyl, propynyl, 1-butynyl, 2-butynyl, 1-pentynyl, 2-pentynyl, 1-hexynyl, 2-hexynyl, and 3-hexynyl.
  • (C 6 to C 14 ) aryl means a group derived from an aromatic hydrocarbon containing from 6 to 14 carbon atoms.
  • Ph and -"phenyl as used herein, mean a -C 6 H 5 group.
  • benzyl as used herein, means a -CH 2 C 6 H 5 group.
  • halogen and/or “halo” refer to fluorine, chlorine, bromine or iodine.
  • the following processes illustrate the general preparation of Compound 7 according to methods of the present invention.
  • the present invention also encompasses novel intermediates that occur in the processes described herein.
  • the methods of preparing Compound 7, as well as intermediates thereof, are useful for preparing a compound that can be used for the treatment of cancer and other diseases associated with angiogenesis or cellular proliferation mediated by protein kinases.
  • any reference to a particular compound used in the methods described herein also encompass any salts of that particular compound.
  • Salts of the present invention include acid addition and base salts (including disalts). Suitable acid addition salts are formed from acids which form non-toxic salts.
  • Examples include the acetate, aspartate, benzoate, besylate, bicarbonate/carbonate, bisulphate/sulfate, borate, camsylate, citrate, edisylate, esylate, formate, fumarate, gluceptate, gluconate, glucuronate, hexafluorophosphate, hibenzate, hydrochloride/chloride, hydrobromide/bromide, hydroiodide/iodide, isethionate, lactate, malate, maleate, malonate, mesylate, methylsulfate, naphthylate, 2-napsylate, nicotinate, nitrate, orotate, oxalate, palmitate, pamoate, phosphate/hydrogen phosphate/dihydrogen phosphate, saccharate, stearate, succinate, tartrate, tosylate and trifluoroacetate salts.
  • Suitable base salts are formed from bases which form non-toxic salts. Examples include the aluminum, arginine, benzathine, calcium, choline, diethylamine, diolamine, glycine, lysine, magnesium, meglumine, olamine, potassium, sodium, tromethamine and zinc salts.
  • a salt of the compounds described herein can be readily prepared by mixing together solutions of the compound and the desired acid or base, as appropriate.
  • the salt may precipitate from solution and be collected by filtration or may be recovered by evaporation of the solvent.
  • the degree of ionization in the salt may vary from completely ionized to almost non-ionized.
  • Compounds described herein containing one or more asymmetric carbon atoms can exist as two or more stereoisomers. Where a compound contains an alkenyl or alkenylene group, geometric cis/trans (or ZlE) isomers are possible. Where the compound contains, for example, a keto or oxime group or an aromatic moiety, tautomeric isomerism ('tautomerism') can occur. A single compound may exhibit more than one type of isomerism. Included within the scope of the invention are all stereoisomers, geometric isomers and tautomeric forms of the compounds described herein, including compounds exhibiting more than one type of isomerism, and mixtures of one or more thereof.
  • One aspect of the present invention is a process for preparing Compound 7 that is depicted by the following Scheme A:
  • a compound represented by formula 3 can be prepared as shown in steps a) and b) by treating a compound of either formula 1 or formula 2 with a deprotecting agent, a base, and an acid.
  • a deprotecting agent e.g., T.W. Greene, P. G. M. Wuts Protective Groups in Organic Synthesis, 3 rd ed. John-Wiley & Sons, 1999.
  • deprotecting agents suitable for this reaction step include Lewis acids such as BBr 3 , BCI 3 , or TMSX (where X is Cl, Br, or I), mineral acids such as HBr or HI, or other strong acids such as methanesulfonic acid.
  • suitable solvent can optionally be used in this step.
  • Solvents that can be used in this step include CH 2 CI 2 .
  • Suitable bases include NaOH, KOH, or an any base that allows for pH adjustment to a pH of about 11 or greater.
  • Suitable acids include HCI, HBr, H 2 SO 4 , H 3 PO 4 , or any acid that allows for pH adjustment to about 7.
  • this reaction step is carried out at elevated temperatures, for example 50 to 70 0 C.
  • step a) can be carried out in the presence of MSA and methionine at about 60 0 C, followed by aqueous NaOH where the pH is adjusted to greater than about 11 , followed by the addition of HCI to adjust the pH to about 7.
  • step b) can be carried out by first adding BBr 3 /CH 2 CI 2 , followed by reflux, then adding aqueous NaOH to adjust the pH to about 11 or greater, followed by the addition of HCI to adjust the pH to about 7.
  • a compound of formula 4 can be prepared as shown in step c) by treating a compound of formula 3 with 2-(4-morpholinyl)-ethyl chloride hydrochloride.
  • Suitable reaction conditions for this step comprise elevated temperatures (e.g. 70 to 90 0 C), a base in a suitable solvent such as acetonitrile, followed by the addition of an aqueous acid, followed by the addition of a base, and optionally followed by purification by recrystallizatjon from an appropriate solvent such as acetonitrile.
  • Suitable bases include Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , KHCO 3 , amines, alkoxides, and hydroxides.
  • Suitable acids include HCI, HBr, H 2 SO 4 , H 3 PO 4 , or any acid that allows for pH adjustment to an acidic pH, preferably to a pH of less than 3.
  • Suitable bases include NaOH, KOH, or any base that allows for pH adjustment to a pH of 12 or greater.
  • step c) can be carried out by adding 2-(4-morpholinyl)-ethyl chloride hydrochloride, NaOtBu, acetonitrile followed by reflux, then adding aqueous or concentrated HCI to adjust the pH to about 2 to 3, followed by the addition of aqueous NaOH to adjust the pH to about 12 to 13, followed by recrystallization from MeCN.
  • a compound of formula 6 can be prepared by treating a compound of formula 5 with a carboxylic acid activating agent and CH 3 NH 2 as indicated in step d).
  • suitable carboxylic activating agents include any agent that is able to activate a carboxylic acid for amide or ester formation, such as CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, and PyBOP.
  • a catalyst may also be used, such as pyridine, DMAP, and the like.
  • the product 6 can optionally be purified by recrystallization from a suitable solvent such as methanol.
  • step d) can be carried out by using CDI in 2-MeTHF, followed by the addition of CH 3 NH 2 in H 2 O, followed by recrystallization from MeOH/H 2 O.
  • a compound of formula 7 can be prepared by treating a compound of formula 4 with a compound of formula 6 as indicated in step e).
  • Suitable reaction conditions include a base in an appropriate solvent at elevated temperatures (e.g. 90 to 11O 0 C).
  • Suitable bases include Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , KHCO 3 , amine bases, alkoxides, hydroxides, NaH, and organometallic reagents.
  • Suitable solvents include any polar aprotic solvent such as DMF, DMSO, and DMAc.
  • the product 7 can optionally be purified by precipitation by addition of antisolvent, such as water, followed by recrystallization from an appropriate solvent or solvent mixtures, such as ethanol/water.
  • antisolvent such as water
  • solvent or solvent mixtures such as ethanol/water.
  • step e) can be carried out by first adding NaOtBu in DMSO at 10O 0 C, followed by the addition of H 2 O, followed by the addition of DARCO G60, EtOH/CH 2 CI 2 , followed by recrystallization from EtOH/H 2 O.
  • Another aspect of the present invention is a process for preparing Compound 6 using a Claisen Condensation that is depicted by the following Scheme B:
  • a compound of formula 11 or 12 can be prepared by treating a compound of formula 9 with a sulfur source such as elemental sulfur S 8 , S x 2" , (NH 4 J 2 S x , and so forth, using a solvent with a high boiling point such as toluene, H 2 O, NMP, DMF and the like, and an amine, including primary or secondary amines, acyclic or cyclic, such as NH 3 , NHR 2 , piperidine, or morpholine.
  • This step is preferably carried out at elevated temperatures, preferably ⁇ 130 0 C.
  • Suitable bases include NaOH and KOH, or any base that allows for the pH adjustment to a pH of about 12 or greater.
  • Suitable aqueous acids include HCI, HBr, H 2 SO 4 , H 3 PO 4 , and the like, or any acid that allows for pH-adjustment to an acidic pH, preferably a pH of less than 2.
  • Salts of compound 11 can be formed using any compound that is capable of forming a salt of 11 , preferably amines, such as dicyclohexylamine.
  • step a) can be carried out using reaction conditions comprising elemental sulfur, morpholine, NMP at 130 0 C for 3 hours.
  • Step b) can then be carried out by adding aqueous NaOH, followed by concentrated HCI to adjust the pH to about O to form the compound of formula 11.
  • the compound of formula 12 can then be formed by the addition of dicyclohexylamine.
  • a compound of formula 13 can be prepared by the addition of a carboxylic acid activation agent and a base to the compound of formula 12 as shown below.
  • Suitable carboxylic acid activation agents include any agent suitable to activate a carboxylic acid for amide or ester formation includung but not limited to CDI, HATU, SOCI 2 , (COCI) 2 , DCC, EDC, HOBt, CDMT, BOP-CI, PyBOP, and the like.
  • Suitable bases include Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , NaHCO 3 , KHCO 3 , and amine bases.
  • step c) in Scheme B can be carried out using SOCI 2 , pyridine, and acetonitrile.
  • a compound of formula 13 can also be prepared from compound 11 by the addition of a suitable carboxylic acid activation agent, a base, and a nucleophile to form the intermediate compound 19, where CO 2 R' in compound 19 represents any suitable ester, such as the ethyl ester.
  • Compound 13 can then be prepared by the addition of a suitable base to compound 19.
  • Suitable nucieophiles include alcohols such as MeOH, and EtOH, or amines such as methylamine.
  • compound 14 can be prepared from compound 13 by using a base, an acylating agent, and a suitable solvent as indicated in step d).
  • Suitable bases include alkoxides, amides, and organometallic reagents.
  • bases may include methoxides, ethoxides, te/t-butoxides, LDA, BuLi and so forth.
  • Appropriate solvents include ethers and esters such as MTBE, THF, 2-MeTHF and EtOAc.
  • Appropriate acylating agents include anhydrides, acid halides, and esters.
  • acetic acid derivatives can be used as the acylating agent.
  • Preferred acylating agents include ethyl acetate, acetyl chloride, and acetic anhydride.
  • the reaction in step d) may be carried out at lower temperatures, preferably T ⁇ 25 0 C, more preferably T ⁇ O "C.
  • step d) can be carried out by adding BuLi as a base and 2-MeTHF as the solvent at a temperature of about O 0 C, followed by the addition of acetyl chloride as the acylating agent.
  • LDA can be used as the base and Ac 2 O can be used as the acylating agent.
  • compounds of formulas 15, 16, and 17 can be prepared from compound 14 as shown in step e) by using a rearrangement dehydration agent in a suitable solvent at an elevated temperature.
  • suitable rearrangement dehydration agents include acids such as HCI, H 2 SO 4 , and MSA
  • suitable solvents include alcohols, such as MeOH or EtOH, and water.
  • Elevated temperature means room temperature (e.g. 25 0 C) or greater.
  • compound 15 can be obtained using step e) where HCI is used and the temperature is 100 0 C.
  • Compound 16 can be obtained where MSA and EtOH are used, and compound 17 can be obtained where MSA and MeOH are used.
  • compound 18 can be prepared from compounds with formulas 15, 16, or 17 as indicated by steps f) and g) by adding CH 3 NH 2 .
  • compound 18 can be prepared from compound 15 by first using CDI and 2-MeTHF as the solvent, followed by the addition of aqueous MeNH 2 .
  • Compound 18 can also be prepared from compounds 16 or 17 by using a catalyst such as NaCN, MeNH 2 , and 2-MeTHF as the solvent.
  • compound 6 can be prepared from compound 18 as shown in step h).
  • compound 6 can be prepared by using a deprotection agent and a scavenger.
  • step h) can be carried out using MSA and methionine.
  • a compound of formula 6 can be formed using the Claisen Condensation as shown.
  • a further aspect of the present invention is a process of preparing a compound of formula 6 using the following Scheme D:
  • compositions may be formulated into pharmaceutical compositions in any pharmaceutical form recognizable to the skilled artisan as being suitable.
  • Pharmaceutical compositions comprise a therapeutically effective amount of a compound of formula 7, or a pharmaceutically acceptable salt or solvate thereof, and an inert, pharmaceutically acceptable carrier or diluent.
  • the mixture was granulated for at least 2 hours at 20 to 25°C, and then filtered.
  • the contents of the flask were rinsed forward with H 2 O and the filter cake was rinsed thoroughly with H 2 O (total amount for rising flask and wetcake: 3x1000 mL).
  • the collected solids were pulled dry and then dried in vacuo at 60 to 7O 0 C with a nitrogen bleed to afford 3 ⁇ a as an off-white solid.
  • the MeCN in the acidic aqueous solution was then removed by concentration of the reaction mixture to 250 to 300 mL by distillation under vacuum while maintaining an internal temperature of 30 to 35°C.
  • the resulting pale yellow-orange color slurry was .
  • the reaction mixture was cooled to -10 to -15 0 C, and 37% HCI (900 mL) was added carefully, maintaining the internal temperature below 25°C.
  • a bi-phasic mixture was obtained with pH ⁇ 1.
  • the phases were separated and the aqueous phase was extracted with 2-MeTHF (1x500 mL).
  • the organic phases were combined and washed with H 2 O (1x500 mL). After the wash, the organic phases were concentrated to -800 mL by atmospheric distillation.
  • the solution was then cooled to 25°C, MeOH (3000 mL) was charged to the flask, and concentration to -800 mL by atmospheric distillation was resumed.
  • the reaction mixture was transferred to a 2L separatory funnel and the contents of the flask were rinsed forward into the separatory funnel using H 2 O (-100 mL) and 2-MeTHF (-100 mL).
  • the layers were separated and the organic layer was washed with 3N HCI (2x150 mL). After extraction of the aqueous layer with 2-MeTHF (2x125 mL), amide 18-a could no longer be detected in the aqueous layer.
  • the organic layer was transferred to a 3L, 3-neck flask and methanesuifonic acid (730 mL) was added. 2-MeTHF was then removed by vacuum distillation.
  • the methanesuifonic acid mixture was then cooled to 0 to 5°C and DL- methionine (247 g, 1.6548 mol) was charged within 5 minutes.
  • the mixture was heated to 65 0 C and stirred for approximately 24 hours when complete consumption of methyl amide 18-a was obtained.
  • the reaction mixture was then cooled to ⁇ 20°C.
  • the cooled reaction mixture was then added in portions to a 5-L, 3-neck flask containing cold (0 to 5 0 C) H 2 O (1360 mL) at a rate sufficient to keep the internal temperature below 20°C.
  • the thick mixture was granulated at a slow stirring rate. More H 2 O (100O mL) was added and granulation continued.
  • a 3L, 3- neck flask was charged with dried phenylacetic acid amine salt 12 (369.8g, 1.0174 mol) and ethyl acetate (1000 mL) to give a brown slurry.
  • the slurry was then heated to reflux within 40 to 50 minutes and a blackish brown solution was obtained, which was cooled to room temperature. More ethyl acetate (1000 mL) was added and the mixture was reheated to reflux and then decanted from undissolved particles.
  • the still hot solution was cooled while stirring and after 45 minutes, a thick light-brown slurry was obtained which was granulated, filtered and rinsed with ethyl acetate ( ⁇ 800 mL).
  • the brown solids were dried at 5O 0 C in vacuo to afford 12 (246.9 g; 53% overall yield; 92% purity).
  • a 3L, 3-neck flask was charged with commercially available 2.0M LDA solution in THF (662 mL, 1.3249 mol) and cooled in an ice/acetone bath. Separately, a 2L flask was charged with the lactone 13-a (72.5g, 0.4416 mol) and 2-MeTHF (725 mL) to give a dark, reddish-brown solution. The -lactone 13-a solution was then transferred to an addition funnel and added carefully to the LDA solution, maintaining the internal temperature below 5 0 C. After complete addition of the lactone 13-a solution, the reaction was warmed to approximately 15 0 C within ⁇ 45 minutes.
  • the solution was cooled again to -2O 0 C and acetic anhydride (50 mL, 0.5300 mol) was added via addition funnel.
  • the reaction mixture containing 14-a was then transferred to a 4L separatory funnel containing H 2 O (800 mL) and 37% HCI (80 mL).
  • the aqueous layer was extracted with 2-MeTHF (2x150 mL) and the combined organic layers ( ⁇ 1.8 L) were transferred to a 3L, 3-neck flask.

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Abstract

La présente invention concerne des procédés de préparation d'un composé de formule 7, utilisable en tant que modulateur et/ou inhibiteur des protéine-kinases. L'invention concerne également des composés intermédiaires utilisables dans la préparation d'un composé de formule 7.
EP06820962A 2005-12-05 2006-11-20 Procedes de preparation d'un inhibiteur du vegf-r Pending EP1963310A2 (fr)

Applications Claiming Priority (2)

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US74284705P 2005-12-05 2005-12-05
PCT/IB2006/003331 WO2007066181A2 (fr) 2005-12-05 2006-11-20 Procedes de preparation d'un inhibiteur du vegf-r

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US7829574B2 (en) 2008-05-09 2010-11-09 Hutchison Medipharma Enterprises Limited Substituted quinazoline compounds and their use in treating angiogenesis-related diseases
JP6315708B2 (ja) * 2015-06-22 2018-04-25 日本電信電話株式会社 リチウム空気二次電池、リチウム空気二次電池の製造方法及びリチウム空気二次電池を備えた装置
CN112724110B (zh) * 2021-01-13 2021-10-26 广州安岩仁医药科技有限公司 一种vegfr抑制剂呋喹替尼及其苯并呋喃类中间体的合成方法

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