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WO2009020578A1 - Agonistes des récepteurs adrénergiques alpha2c - Google Patents

Agonistes des récepteurs adrénergiques alpha2c Download PDF

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Publication number
WO2009020578A1
WO2009020578A1 PCT/US2008/009366 US2008009366W WO2009020578A1 WO 2009020578 A1 WO2009020578 A1 WO 2009020578A1 US 2008009366 W US2008009366 W US 2008009366W WO 2009020578 A1 WO2009020578 A1 WO 2009020578A1
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group
optionally substituted
alkyl
independently selected
heteroaryl
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Inventor
Jianhua Chao
Junying Zheng
Robert G. Aslanian
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Merck Sharp and Dohme LLC
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Schering Corp
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
    • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D495/04—Ortho-condensed systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system

Definitions

  • the present invention relates to compounds useful as ⁇ 2C adrenergic receptor agonists, methods for making the compounds, pharmaceutical compositions containing the compounds, and methods of treatment and prevention using the compounds and compositions to treat disease states such as congestion (including nasal), migraine, congestive heart failure, cardiac ischemia, glaucoma, pain and psychotic disorders.
  • disease states such as congestion (including nasal), migraine, congestive heart failure, cardiac ischemia, glaucoma, pain and psychotic disorders.
  • ⁇ -adrenergic receptors were shown to be associated with most of the excitatory functions (vasoconstriction, stimulation of the uterus and pupil dilation), ⁇ -adrenergic receptors were implicated in vasodilation, bronchodilation and myocardial stimulation (Lands et al., "Differentiation of Receptor Systems Activated by Sympathomimetic amines," Nature 214:597-598 (1967)). Since this early work, ⁇ -adrenergic receptors have been subdivided into ⁇ 1 - and ⁇ 2-adrenergic receptors.
  • ⁇ -adrenergic receptors Cloning and expression of ⁇ -adrenergic receptors have confirmed the presence of multiple subtypes of both ⁇ 1 -( ⁇ 1 A, ⁇ 1 B, ⁇ 1 D) and ⁇ 2-( ⁇ 2A, ⁇ 2B, ⁇ 2C) adrenergic receptors (Michel et al., "Classification of ⁇ i -Adrenoceptor Subtypes,” Naunyn-Schmiedeberg's Arch. Pharmacol, 352:1 -10 (1995); Macdonald et al., "Gene Targeting-Homing in on ⁇ 2 -Adrenoceptor-Subtype Function," TIPS, 18:211 - 219 (1997)).
  • ⁇ -2 adrenergic receptor drugs involve the ability of those drugs to mediate many of the physiological actions of the endogenous catecholamines. There are many drugs that act on these receptors to control hypertension, intraocular pressure, eye reddening and nasal congestion and induce analgesia and anesthesia.
  • ⁇ 2 adrenergic receptors can be found in the rostral ventrolateral medulla, and are known to respond to the neurotransmitter norepinephrine and the antihypertensive drug clonidine to decrease sympathetic outflow and reduce arterial blood pressure (Bousquet et al., "Role of the Ventral Surface of the Brain Stem in the Hypothesive Action of Clonidine," Eur. J.
  • compositions having an adrenergic compound or compounds as the active ingredient are useful for treating, among other things, glaucoma, chronic pain, migraines, heart failure, and psychotic disorders (e.g., schizophrenia).
  • R 1 -R 3 represent hydrogen, halogen hydroxy, alkyl or alkoxy, and R 5 is hydrogen or alkyl.
  • Another class of compounds reported to have affinity for ⁇ 2 receptors includes the following two compounds (Bagley et.al., Med. Chem. Res. 1994, 4:346-364):
  • ⁇ 2A agonists may be associated with undesirable side effects.
  • side effects include hyper-and hypotension, sedation, locomotor activity, psychotic disorders (e.g., schizophrenia).
  • Another class of compounds reported to have affinity for ⁇ 2 receptors includes the following two compounds (Miller et.al., J. Med. Chem. 1994, 37:2328-2333; J. Med. Chem. 1996, 39:3001 -3013; J. Med. Chem. 1997, 37:3014-3024):
  • This class specifically includes MPV-2426 (fadolmidine) and its prodrug esters: wherein R is optionally substituted lower alkyl, aryl, cycloalkyl, heteroaryl, lower alkylamino, and saturated 5- or 6-membered heterocyclic groups containing 1 or 2 N atoms.
  • R is optionally substituted lower alkyl, aryl, cycloalkyl, heteroaryl, lower alkylamino, and saturated 5- or 6-membered heterocyclic groups containing 1 or 2 N atoms.
  • U.S. Patent 6,673,337 describes and claims an ophthalmic composition comprising an alpha-2C agonist component and a solubility enhancing component other than cyclodextrin.
  • adrenergic compounds that act as agonists of the ⁇ 2C receptor subtypes possess desirable therapeutic properties.
  • the present invention provides a novel class of heterocyclic compounds that function as ⁇ 2C adrenergic receptor agonists, or metabolites, stereoisomers, salts, solvates or polymorphs thereof, methods of preparing such compounds, pharmaceutical compositions comprising one or more such compounds, methods of preparing pharmaceutical formulations comprising one or more such compounds, and methods of treatment, prevention, inhibition or amelioration of one or more conditions associated with ⁇ 2C receptors using such compounds or pharmaceutical compositions.
  • the present application discloses a compound, or pharmaceutically acceptable salts or metabolites, solvates, prodrugs or polymorphs of said compound, said compound having the general structure shown in Formula I
  • Z is -[C(R C )(R C )] X - ;
  • X is -O- , -S(O)p- , or -N(R 2 );
  • R 2 is independently selected from the group consisting of H and alkyl
  • R 4 is independently selected from the group consisting of H, halo, and alkyl, alkoxy, alkenyl, alkenyloxy, alkynyl, cycloalkyl, cycloalkoxy, aryl, aryloxy, arylalkyl, heteroaryl, heteroarylalkyl, heterocyclyl, and heterocyclylalkyl groups optionally substituted with at least one (preferably 1 to 5, more preferably 1 to 3) R 5 ;
  • R 6 is H;
  • R 7 is independently selected from the group consisting of H and alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, cycloclenyl, cyclocyclenylalkyl, aryl, arylalkyl, heterocyclyl, heterocyclylalkyl, hetrocyclenyl, hetrocyclenylalkyl, heteroaryl, and heteroarylalkyl groups, each of which is optionally substituted one or more times (preferably 1 to 5, more preferably 1 to 3) by R 12 ;
  • R 7 is independently selected from the group consisting of H and alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, cycloclenyl, cyclocyclenylalkyl, aryl, arylalkyl, heterocyclyl, heterocyclylalkyl, hetrocyclenyl, hetrocyclenylalkyl, heteroaryl, and heteroarylalkyl groups, each of which is optionally substituted one or more times (preferably 1 to 5, more preferably 1 to 3) by R 12 ; or a) when a variable is -NR 7 R 7' , -[C(R a )(R b )] q YR 7' , -C(R a )(R b )] q NR 7 R 7' , - [C(R a )(R b )] q OYR 7 V -(CH 2 ) q NR
  • R 11 is independently selected from the group consisting of H, alkyl, alkoxy, alkenyl, alkenyloxy, alkynyl, cycloalkyl, cycloalkoxy, aryl, aryloxy, arylalkyl, heteroaryl, heteroarylalkyl, heterocyclyl, and heterocyclylalkyl;
  • the compounds of Formula I can be useful as ⁇ 2C adrenergic receptor agonists, which can be useful in the treatment and prevention of allergic rhinitis, congestion (including, but not limited to nasal congestion), migraine, congestive heart failure, cardiac ischemia, glaucoma, stress-induced urinary incontence, neuronal damage from ischemia, attention deficit disorder (ADD) and psychotic disorders (e.g., schizophrenia).
  • the compounds of Formula I can be useful in the treatment of pain (both chronic and acute), such as pain that is caused by inflammation, neuropathy, arthritis (including osteo and rheumatoid arthritis), diabetes (e.g., diabetes mellitus or diabetes insipidus) or pain of an unknown origin.
  • neuropathic pain may include but not limited to; diabetic neuropathy, neuralgia of any etiology (e.g. post-herpetic, trigeminal), chemotherapy-induced neuropathy, HIV, lower back pain of neuropathic origin (e.g. sciatica), traumatic peripheral nerve injury of any etiology, central pain (e.g. post-stroke, thalamic, spinal nerve injury).
  • Other pain that can be treated is nociceptive pain and pain that is visceral in origin or pain that is secondary to inflammation or nerve damage in other diseases or diseases of unknown origin.
  • the present invention discloses certain heterocyclic compounds which are represented by structural Formula I, or a pharmaceutically acceptable salt or solvate thereof, wherein the various moieties are as described above.
  • A is unsubstituted imidazole.
  • n 1
  • p is 0-2.
  • q is 0-3.
  • the present invention discloses compounds which are represented by structural formulae II, III, or IV or a pharmaceutically acceptable salt, solvate or ester thereof,
  • X is -O-
  • R 1 is H or -(CH 2 ) q NH(Y)R 7 ;
  • Patient includes both human and animals.
  • “Mammal” means humans and other mammalian animals.
  • Congestion refers to all type of congestion including, but not limited to, congestion associated with perennial allergic rhinitis, seasonal allergic rhinitis, non- allergic rhinitis, vasomotor rhinitis, rhinitis medicamentosa, sinusitis, acute rhinosinusitis, or chronic rhinosinusitis or when the congestion is caused by polyps or is associated with the common cold.
  • Alkyl means an aliphatic hydrocarbon group which may be straight or branched and comprising about 1 to about 20 carbon atoms in the chain. Preferred alkyl groups contain about 1 to about 12 carbon atoms in the chain. More preferred alkyl groups contain about 1 to about 6 carbon atoms in the chain. Branched means that one or more lower alkyl groups such as methyl, ethyl or propyl, are attached to a linear alkyl chain. "Lower alkyl” means a group having about 1 to about 6 carbon atoms in the chain which may be straight or branched.
  • substituted alkyl means that the alkyl group may be substituted by one or more substituents which may be the same or different, each substituent being independently selected from the group consisting of halo, alkyl, aryl, cycloalkyl, cyano, hydroxy, alkoxy, alkylthio, amino, -NH(alkyl), -NH(cycloalkyl), -N(alkyl) 2) carboxy and -C(O)O-alkyl.
  • suitable alkyl groups include methyl, ethyl, n-propyl, isopropyl and t-butyl.
  • Alkynyl means an aliphatic hydrocarbon group containing at least one carbon- carbon triple bond and which may be straight or branched and comprising about 2 to about 15 carbon atoms in the chain.
  • Preferred alkynyl groups have about 2 to about 12 carbon atoms in the chain; and more preferably about 2 to about 4 carbon atoms in the chain.
  • Branched means that one or more lower alkyl groups such as methyl, ethyl or propyl, are attached to a linear alkynyl chain.
  • “Lower alkynyl” means about 2 to about 6 carbon atoms in the chain which may be straight or branched.
  • Non-limiting examples of suitable alkynyl groups include ethynyl, propynyl, 2-butynyl and 3- methylbutynyl.
  • substituted alkynyl means that the alkynyl group may be substituted by one or more substituents which may be the same or different, each substituent being independently selected from the group consisting of alkyl, aryl and cycloalkyl.
  • Aryl means an aromatic monocyclic or multicyclic ring system, in which at least one of the multicyclic rings is an aryl ring, comprising about 6 to about 14 carbon atoms, preferably about 6 to about 10 carbon atoms.
  • the aryl group can be optionally substituted with one or more "ring system substituents" which may be the same or different, and are as defined herein.
  • suitable aryl groups include phenyl and naphthyl.
  • Non-limiting examples of aryl multicyclic ring systems include:
  • Heteroaryl means an aromatic monocyclic or multicyclic ring system, in which at least one of the multicyclic rings is aromatic, comprising about 5 to about 14 ring atoms, preferably about 5 to about 10 ring atoms, in which one or more of the ring atoms is an element other than carbon, for example nitrogen, oxygen or sulfur, alone or in combination.
  • Preferred heteroaryls contain about 5 to about 6 ring atoms.
  • the “heteroaryl” can be optionally substituted by one or more "ring system substituents" which may be the same or different, and are as defined herein.
  • the prefix aza, oxa or thia before the heteroaryl root name means that at least a nitrogen, oxygen or sulfur atom respectively, is present as a ring atom.
  • a nitrogen atom of a heteroaryl can be optionally oxidized to the corresponding N-oxide.
  • Non-limiting examples of suitable heteroaryls include pyridyl, pyrazinyl, furanyl, thienyl, pyrimidinyl, isoxazolyl, isothiazolyl, oxazolyl, thiazolyl, pyrazolyl, furazanyl, pyrrolyl, pyrazolyl, triazolyl, 1 ,2,4- thiadiazolyl, pyrazinyl, pyridazinyl, quinoxalinyl, phthalazinyl, imidazo[1 ,2-a]pyridinyl, imidazo[2,1 -b]thiazolyl, benzofurazanyl, indolyl, azaindolyl, benzimidazolyl, benzothienyl, quinolinyl, imidazolyl, thienopyridyl, quinazolinyl, thienopyrimidyl, pyrrolopyr
  • Non-limiting examples of hetreroaryl multicyclic ring systems include:
  • Aralkyl or “arylalkyl” means an aryl-alkyl- group in which the aryl and alkyl are as previously described. Preferred aralkyls comprise a lower alkyl group. Non-limiting examples of suitable aralkyl groups include benzyl, 2-phenethyl and naphthalenylmethyl. The bond to the parent moiety is through the alkyl.
  • Alkylaryl means an alkyl-aryl- group in which the alkyl and aryl are as previously described. Preferred alkylaryls comprise a lower alkyl group. Non-limiting example of a suitable alkylaryl group is tolyl. The bond to the parent moiety is through the aryl.
  • Cycloalkyl means a non-aromatic mono- or multicyclic ring system comprising about 3 to about 10 carbon atoms, preferably about 5 to about 10 carbon atoms. Preferred cycloalkyl rings contain about 5 to about 7 ring atoms. The cycloalkyl can be optionally substituted with one or more "ring system substituents" which may be the same or different, and are as defined above.
  • Non-limiting examples of suitable monocyclic cycloalkyls include cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl and the like.
  • Non-limiting examples of suitable multicyclic cycloalkyls include 1-decalinyl, norbornyl, adamantyl and the like.
  • Halogen and Halo mean fluorine, chlorine, bromine, or iodine. Preferred are fluorine, chlorine or bromine, and more preferred are fluorine and chlorine.
  • Ring system substituent means a substituent attached to an aromatic or non- aromatic ring system which, for example, replaces an available hydrogen on the ring system.
  • Ring system substituents may be the same or different, each being independently selected from the group consisting of aryl, heteroaryl, aralkyl, alkylaryl, heteroaralkyl, alkylheteroaryl, hydroxy, hydroxyalkyl, alkoxy, aryloxy, aralkoxy, acyl, aroyl, halo, nitro, cyano, carboxy, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, alkylsulfonyl, arylsulfonyl, heteroarylsulfonyl, alkylthio, arylthio, heteroarylthio, aralkylthio, heteroaralkylthio, cycloalkyl, heterocyclyl, Y 1 Y 2 N-, YiY 2 N-alkyl-, YiY 2 NC(O)- and YiY 2 NSO 2 -, wherein Yi and Y 2 may be the same or different and
  • Heterocyclyl means a non-aromatic saturated monocyclic or multicyclic ring system comprising about 3 to about 10 ring atoms, preferably about 5 to about 10 ring atoms, in which one or more of the atoms in the ring system is an element other than carbon, for example nitrogen, oxygen or sulfur, alone or in combination. There are no adjacent oxygen and/or sulfur atoms present in the ring system.
  • Preferred heterocyclyls contain about 5 to about 6 ring atoms.
  • the prefix aza, oxa or thia before the heterocyclyl root name means that at least a nitrogen, oxygen or sulfur atom respectively is present as a ring atom.
  • Any -NH in a heterocyclyl ring may exist protected such as, for example, as an -N(Boc), -N(CBz), -N(Tos) group and the like; such protected moieties are also considered part of this invention.
  • the heterocyclyl can be optionally substituted by one or more "ring system substituents" which may be the same or different, and are as defined herein.
  • the nitrogen or sulfur atom of the heterocyclyl can be optionally oxidized to the corresponding N-oxide, S-oxide or S 1 S- dioxide.
  • Non-limiting examples of suitable monocyclic heterocyclyl rings include piperidyl, pyrrolidinyl, imidazolidinyl, pyrazolidinyl, piperazinyl, morpholinyl, thiomorpholinyl, thiazolidinyl, 1 ,4-dioxanyl, tetrahydrofuranyl, tetrahydrothiophenyl, and the like.
  • Alkynylalkyl means an alkynyl-alkyl- group in which the alkynyl and alkyl are as previously described. Preferred alkynylalkyls contain a lower alkynyl and a lower alkyl group. The bond to the parent moiety is through the alkyl. Non-limiting examples of suitable alkynylalkyl groups include propargylmethyl.
  • Heteroaralkyl means a heteroaryl-alkyl- group in which the heteroaryl and alkyl are as previously described. Preferred heteroaralkyls contain a lower alkyl group. Non-limiting examples of suitable aralkyl groups include pyridylmethyl, and quinolin-3-ylmethyl. The bond to the parent moiety is through the alkyl.
  • Heterocyclylalkyl means a heterocyclyl-alkyl group in which the heterocyclyl and the alkyl are as previously described. Preferred heterocyclylalkyls contain a lower alkyl group.
  • suitable heterocyclylalkyl groups include piperidylmethyl, piperidylethyl, pyrrolidylmethyl, morpholinylpropyl, piperazinylethyl, azindylmethyl, azetidylethyl, oxiranylpropyl and the like.
  • the bond to the parent moiety is through the alkyl group.
  • Heterocyclenyl (or “heterocycloalkeneyl”) means a non-aromatic monocyclic or multicyclic ring system comprising about 3 to about 10 ring atoms, preferably about 5 to about 10 ring atoms, in which one or more of the atoms in the ring system is an element other than carbon, for example nitrogen, oxygen or sulfur atom, alone or in combination, and which contains at least one carbon-carbon double bond or carbon- nitrogen double bond. There are no adjacent oxygen and/or sulfur atoms present in the ring system.
  • Preferred heterocyclenyl rings contain about 5 to about 6 ring atoms.
  • the prefix aza, oxa or thia before the heterocyclenyl root name means that at least a nitrogen, oxygen or sulfur atom respectively is present as a ring atom.
  • the heterocyclenyl can be optionally substituted by one or more ring system substituents, wherein "ring system substituent" is as defined above.
  • the nitrogen or sulfur atom of the heterocyclenyl can be optionally oxidized to the corresponding N-oxide, S-oxide or S,S-dioxide.
  • Non-limiting examples of suitable monocyclic azaheterocyclenyl groups include 1 ,2,3,4- tetrahydropyridyl, 1 ,2-dihydropyridyl, 1 ,4-dihydropyridyl, 1 ,2,3,6- tetrahydropyridyl, 1 ,4,5,6-tetrahydropyrimidyl, 2-pyrrolinyl, 3-pyrrolinyl, 2-imidazolinyl, 2-pyrazolinyl, 2-oxazolinyl, 2-thiazolinyl, and the like.
  • Non-limiting examples of suitable oxaheterocyclenyl groups include 3,4-dihydro-2H-pyran, dihydrofuranyl, fluorodihydrofuranyl, and the like.
  • Non-limiting example of a suitable multicyclic oxaheterocyclenyl group is 7-oxabicyclo[2.2.1]heptenyl.
  • suitable monocyclic thiaheterocyclenyl rings include dihydrothiophenyl, dihydrothiopyranyl, and the like.
  • Heterocyclenylalkyl means a heterocyclenyl-alkyl group in which the heterocyclenyl and the alkyl are as previously described.
  • Hydroxyalkyl means a HO-alkyl- group in which alkyl is as previously defined. Preferred hydroxyalkyls contain lower alkyl. Non-limiting examples of suitable hydroxyalkyl groups include hydroxymethyl and 2-hydroxyethyl.
  • acyl means an organic acid group in which the -OH of the carboxyl group is replaced by some other substituent. Suitable non-limiting examples include H-C(O)-, alkyl-C(O)- , cycloalkyl-C(O)-, heterocyclyl-C(O)-, and heteroaryl-C(O)- groups in which the various groups are as previously described. The bond to the parent moiety is through the carbonyl.
  • Preferred acyls contain a lower alkyl.
  • suitable acyl groups include formyl, acetyl and propanoyl.
  • Aroyl means an aryl-C(O)- group in which the aryl group is as previously described. The bond to the parent moiety is through the carbonyl.
  • suitable groups include benzoyl and 1 -naphthoyl.
  • Alkoxy means an alkyl-O- group in which the alkyl group is as previously described.
  • suitable alkoxy groups include methoxy, ethoxy, n-propoxy, isopropoxy and n-butoxy.
  • the bond to the parent moiety is through the ether oxygen.
  • Aryloxy means an aryl-O- group in which the aryl group is as previously described.
  • suitable aryloxy groups include phenoxy and naphthoxy. The bond to the parent moiety is through the ether oxygen.
  • Aralkyloxy or “arylalkyloxy” means an aralkyl-O- group in which the aralkyl group is as previously described.
  • suitable aralkyloxy groups include benzyloxy and 1 - or 2-naphthalenemethoxy.
  • the bond to the parent moiety is through the ether oxygen.
  • Heteroarylalkoxy means a heteroarylalkyl-O-group in which the heteroarylalkyl group is as previously described.
  • Heterocyclylalkoxy means a heterocyclylalkyl-0 group in which the hetrocyclylalkyl group is as previously described.
  • Heterocyclenylalkoxy means a heterocyclenylalkyl-0 group in which the heterocyclenylalkyl group is as previously described.
  • Alkylthio means an alkyl-S- group in which the alkyl group is as previously described.
  • suitable alkylthio groups include methylthio and ethylthio.
  • the bond to the parent moiety is through the sulfur.
  • Arylthio means an aryl-S- group in which the aryl group is as previously described.
  • suitable arylthio groups include phenylthio and naphthylthio.
  • the bond to the parent moiety is through the sulfur.
  • Alkylthio means an aralkyl-S- group in which the aralkyl group is as previously described.
  • Non-limiting example of a suitable aralkylthio group is benzylthio.
  • the bond to the parent moiety is through the sulfur.
  • Alkoxycarbonyl means an alkyl-O-CO- group. Non-limiting examples of suitable alkoxycarbonyl groups include methoxycarbonyl and ethoxycarbonyl. The bond to the parent moiety is through the carbonyl.
  • Aryloxycarbonyl means an aryl-O-C(O)- group. Non-limiting examples of suitable aryloxycarbonyl groups include phenoxycarbonyl and naphthoxycarbonyl. The bond to the parent moiety is through the carbonyl.
  • Alkoxycarbonyl means an aralkyl-O-C(O)- group.
  • a suitable aralkoxycarbonyl group is benzyloxycarbonyl.
  • the bond to the parent moiety is through the carbonyl.
  • Alkylsulfonyl means an alkyl-S(O 2 )- group. Preferred groups are those in which the alkyl group is lower alkyl. The bond to the parent moiety is through the sulfonyl.
  • Arylsulfonyl means an aryl-S(O 2 )- group. The bond to the parent moiety is through the sulfonyl.
  • substituted means that one or more hydrogens on the designated atom is replaced with a selection from the indicated group, provided that the designated atom's normal valency under the existing circumstances is not exceeded, and that the substitution results in a stable compound. Combinations of substituents and/or variables are permissible only if such combinations result in stable compounds.
  • stable compound' or “stable structure” is meant a compound that is sufficiently robust to survive isolation to a useful degree of purity from a reaction mixture, and formulation into an efficacious therapeutic agent. It is noted that carbons of Formula I can be replaced with 1-3 silicon atoms, provided all valency requirements are satisfied.
  • the straight line as a bond generally indicates a mixture of, or either of, the possible isomers, non-limiting example(s) include, containing (R)- and (S)- stereochemistry.
  • the possible isomers include, containing (R)- and (S)- stereochemistry.
  • a dashed line ( ) represents an optional bond.
  • Lines drawn into the ring systems such as, for example: indicate that the indicated line (bond) may be attached to any of the substitutable ring atoms, non-limiting examples include carbon, nitrogen and sulfur ring atoms.
  • protecting groups When a functional group in a compound is termed "protected", this means that the group is in modified form to preclude undesired side reactions at the protected site when the compound is subjected to a reaction. Suitable protecting groups will be recognized by those with ordinary skill in the art as well as by reference to standard textbooks such as, for example, T. W. Greene et al, Protective Groups in organic Synthesis (1991), Wiley, New York.
  • any variable e.g., aryl, heterocycle, R 2 , etc.
  • its definition on each occurrence is independent of its definition at every other occurrence.
  • all definitions for the variables follow the convention that the group to the right forms the point of attachement to the molecule; i.e., if a definition is arylalkyl, this means that the alkyl portion of the definition is attached to the molecule.
  • composition is intended to encompass a product comprising the specified ingredients in the specified amounts, as well as any product which results, directly or indirectly, from combination of the specified ingredients in the specified amounts.
  • Prodrugs and solvates of the compounds of the invention are also contemplated herein.
  • the term "prodrug”, as employed herein, denotes a compound that is a drug precursor which, upon administration to a subject, undergoes chemical conversion by metabolic or chemical processes to yield a compound of formula I or a salt and/or solvate thereof.
  • prodrugs is provided in T. Higuchi and V. Stella, Pro-drugs as Novel Delivery Systems (1987) Volume 14 of the A.C.S.
  • a prodrug can comprise an ester formed by the replacement of the hydrogen atom of the acid group with a group such as, for example, (Ci-C 8 )alkyl, (C 2 - Ci 2 )alkanoyloxymethyl, 1 -(alkanoyloxy)ethyl having from 4 to 9 carbon atoms, 1- methyl-1 -(alkanoyloxy)-ethyl having from 5 to 10 carbon atoms, alkoxycarbonyloxymethyl having from 3 to 6 carbon atoms, 1 -(alkoxycarbonyloxy)ethyl having from 4 to 7 carbon atoms, 1 -methyl-1 -
  • a prodrug can be formed by the replacement of the hydrogen atom of the alcohol group with a group such as, for example, (CrC 6 )alkanoyloxymethyl, 1 -((Ci- C 6 )alkanoyloxy)ethyl, 1 -methyl-1 -((Ci-C 6 )alkanoyloxy)ethyl, (Ci- C- 6 )alkoxycarbonyloxymethyl, N-(C 1 -C 6 )alkoxycarbonylaminomethyl, succinoyl, (Cr C 6 )alkanoyl, ⁇ -amino(CrC 4 )alkanyl, arylacyl and ⁇ -aminoacyl, or ⁇ -aminoacyl- ⁇ - aminoacyl, where each ⁇ -aminoacyl group is independently selected from the naturally occurring L-amino acids, -P(O)(OH)
  • a prodrug can be formed by the replacement of a hydrogen atom in the amine group with a group such as, for example, R-carbonyl, RO-carbonyl, NRR'- carbonyl where R and R' are each independently (Ci-Ci O )alkyl, (C 3 -C 7 ) cycloalkyl, benzyl, or R-carbonyl is a natural ⁇ -aminoacyl or natural ⁇ -aminoacyl, -C(OH)C(O)OY 1 wherein Y 1 is H, (C r C 6 )alkyl or benzyl, -C(OY 2 ) Y 3 wherein Y 2 is (Ci-C 4 ) alkyl and Y 3 is (Ci-C ⁇ )alkyl,
  • One or more compounds of the invention may exist in unsolvated as well as solvated forms with pharmaceutically acceptable solvents such as water, ethanol, and the like, and it is intended that the invention embrace both solvated and unsolvated forms.
  • “Solvate” means a physical association of a compound of this invention with one or more solvent molecules. This physical association involves varying degrees of ionic and covalent bonding, including hydrogen bonding. In certain instances the solvate will be capable of isolation, for example when one or more solvent molecules are incorporated in the crystal lattice of the crystalline solid. "Solvate” encompasses both solution-phase and isolatable solvates. Non-limiting examples of illustrative solvates include ethanolates, methanolates, and the like.
  • “Hydrate” is a solvate wherein the solvent molecule is H 2 O.
  • One or more compounds of the invention may optionally be converted to a solvate.
  • Preparation of solvates is generally known.
  • M. Caira et al, J. Pharmaceutical ScL, 93(3), 601 -611 (2004) describe the preparation of the solvates of the antifungal fluconazole in ethyl acetate as well as from water. Similar preparations of solvates, hemisolvate, hydrates and the like are described by E. C. van Tonder et al, AAPS PharmSciTech., 5(1), article 12 (2004); and A. L. Bingham et al, Chem.
  • a typical, non-limiting, process involves dissolving the inventive compound in desired amounts of the desired solvent (organic or water or mixtures thereof) at a higher than ambient temperature, and cooling the solution at a rate sufficient to form crystals which are then isolated by standard methods.
  • Analytical techniques such as, for example I. R. spectroscopy, show the presence of the solvent (or water) in the crystals as a solvate (or hydrate).
  • Metabolic conjugates such as glucuronides and sulfates which can undergo reversible conversion to the compounds of of Formula I are contemplated in the present invention.
  • Effective amount or “therapeutically effective amount” is meant to describe an amount of compound or a composition of the present invention effective in producing the desired therapeutic, ameliorative, inhibitory or preventative effect.
  • purified in purified form or “in isolated and purified form,” as used herein, for a compound refers to the physical state of said compound after being isolated from a synthetic process (e.g. from a reaction mixture), or natural source or combination thereof.
  • purified in purified form or “in isolated and purified form” for a compound refers to the physical state of said compound after being obtained from a purification process or processes described herein or well known to the skilled artisan (e.g., chromatography, recrystallization and the like) , in sufficient purity to be characterizable by standard analytical techniques described herein or well known to the skilled artisan.
  • Capsule is meant to describe a special container or enclosure made of methyl cellulose, polyvinyl alcohols, or denatured gelatins or starch for holding or containing compositions comprising the active ingredients.
  • Hard shell capsules are typically made of blends of relatively high gel strength bone and pork skin gelatins. The capsule itself may contain small amounts of dyes, opaquing agents, plasticizers and preservatives.
  • Tablet is meant to describe a compressed or molded solid dosage form containing the active ingredients with suitable diluents.
  • the tablet can be prepared by compression of mixtures or granulations obtained by wet granulation, dry granulation or by compaction.
  • Oral gels is meant to describe to the active ingredients dispersed or solubilized in a hydrophillic semi-solid matrix.
  • “Powders for constitution” refers to powder blends containing the active ingredients and suitable diluents which can be suspended in water or juices.
  • “Diluent” refers to substances that usually make up the major portion of the composition or dosage form. Suitable diluents include sugars such as lactose, sucrose, mannitol and sorbitol; starches derived from wheat, corn, rice and potato; and celluloses such as microcrystalline cellulose.
  • the amount of diluent in the composition can range from about 10 to about 90% by weight of the total composition, preferably from about 25 to about 75%, more preferably from about 30 to about 60% by weight, even more preferably from about 12 to about 60%.
  • “Disintegrants” refers to materials added to the composition to help it break apart (disintegrate) and release the medicaments.
  • Suitable disintegrants include starches; "cold water soluble” modified starches such as sodium carboxymethyl starch; natural and synthetic gums such as locust bean, karaya, guar, tragacanth and agar; cellulose derivatives such as methylcellulose and sodium carboxymethylcellulose; microcrystalline celluloses and cross-linked microcrystalline celluloses such as sodium croscarmellose; alginates such as alginic acid and sodium alginate; clays such as bentonites; and effervescent mixtures.
  • the amount of disintegrant in the composition can range from about 2 to about 15% by weight of the composition, more preferably from about 4 to about 10% by weight.
  • Binders refers to substances that bind or "glue” powders together and make them cohesive by forming granules, thus serving as the "adhesive" in the formulation. Binders add cohesive strength already available in the diluent or bulking agent. Suitable binders include sugars such as sucrose; starches derived from wheat, corn rice and potato; natural gums such as acacia, gelatin and tragacanth; derivatives of seaweed such as alginic acid, sodium alginate and ammonium calcium alginate; cellulosic materials such as methylcellulose and sodium carboxymethylcellulose and hydroxypropylmethylcellulose; polyvinylpyrrolidone; and inorganics such as magnesium aluminum silicate.
  • the amount of binder in the composition can range from about 2 to about 20% by weight of the composition, more preferably from about 3 to about 10% by weight, even more preferably from about 3 to about 6% by weight.
  • “Lubricant” is meant to describe a substance added to the dosage form to enable the tablet, granules, etc. after it has been compressed, to release from the mold or die by reducing friction or wear.
  • Suitable lubricants include metallic stearates such as magnesium stearate, calcium stearate or potassium stearate; stearic acid; high melting point waxes; and water soluble lubricants such as sodium chloride, sodium benzoate, sodium acetate, sodium oleate, polyethylene glycols and d'l-leucine. Lubricants are usually added at the very last step before compression, since they must be present on the surfaces of the granules and in between them and the parts of the tablet press.
  • the amount of lubricant in the composition can range from about 0.2 to about 5% by weight of the composition, preferably from about 0.5 to about 2%, more preferably from about 0.3 to about 1.5% by weight.
  • “Glidents” means materials that prevent caking and improve the flow characteristics of granulations, so that flow is smooth and uniform. Suitable glidents include silicon dioxide and talc. The amount of glident in the composition can range from about 0.1% to about 5% by weight of the total composition, preferably from about 0.5 to about 2% by weight.
  • Coloring agents refers to excipients that provide coloration to the composition or the dosage form. Such excipients can include food grade dyes and food grade dyes adsorbed onto a suitable adsorbent such as clay or aluminum oxide. The amount of the coloring agent can vary from about 0.1 to about 5% by weight of the composition, preferably from about 0.1 to about 1%.
  • Bioavailability refers to the rate and extent to which the active drug ingredient or therapeutic moiety is absorbed into the systemic circulation from an administered dosage form as compared to a standard or control.
  • Conventional methods for preparing tablets are known. Such methods include dry methods such as direct compression and compression of granulation produced by compaction, or wet methods or other special procedures.
  • Conventional methods for making other forms for administration such as, for example, capsules, suppositories and the like are also well known.
  • the compounds of Formula I can form salts which are also within the scope of this invention.
  • Reference to a compound of Formula I herein is understood to include reference to salts thereof, unless otherwise indicated.
  • the term "salt(s)" denotes acidic salts formed with inorganic and/or organic acids, as well as basic salts formed with inorganic and/or organic bases.
  • a compound of of Formula I contains both a basic moiety, such as, but not limited to a pyridine or imidazole, and an acidic moiety, such as, but not limited to a carboxylic acid, zwittehons ("inner salts”) may be formed and are included within the term "salt(s)" as used herein.
  • Salts of the compounds of Formula I or may be formed, for example, by reacting a compound of Formula I with an amount of acid or base, such as an equivalent amount, in a medium such as one in which the salt precipitates or in an aqueous medium followed by lyophilization.
  • Exemplary acid addition salts include acetates, ascorbates, benzoates, benzenesulfonates, bisulfates, borates, butyrates, citrates, camphorates, camphorsulfonates, fumarates, hydrochlorides, hydrobromides, hydroiodides, lactates, maleates, methanesulfonates, naphthalenesulfonates, nitrates, oxalates, phosphates, propionates, salicylates, succinates, sulfates, tartarates, thiocyanates, toluenesulfonates (also known as tosylates,) and the like.
  • Exemplary basic salts include ammonium salts, alkali metal salts such as sodium, lithium, and potassium salts, alkaline earth metal salts such as calcium and magnesium salts, salts with organic bases (for example, organic amines) such as dicyclohexylamines, t-butyl amines, and salts with amino acids such as arginine, lysine and the like.
  • Basic nitrogen-containing groups may be quarternized with agents such as lower alkyl halides (e.g. methyl, ethyl, and butyl chlorides, bromides and iodides), dialkyl sulfates (e.g.
  • dimethyl, diethyl, and dibutyl sulfates dimethyl, diethyl, and dibutyl sulfates
  • long chain halides e.g. decyl, lauryl, and stearyl chlorides, bromides and iodides
  • aralkyl halides e.g. benzyl and phenethyl bromides
  • All stereoisomers (for example, geometric isomers, optical isomers and the like) of the present compounds including those of the salts, solvates and prodrugs of the compounds as well as the salts and solvates of the prodrugs), such as those which may exist due to asymmetric carbons or sulfurs on various substituents, including enantiomeric forms (which may exist even in the absence of asymmetric carbons), rotameric forms, atropisomers, and diastereomeric forms, are contemplated within the scope of this invention.
  • a compound of Formula I incorporates a double bond or a fused ring, both the cis- and trans-forms, as well as mixtures, are embraced within the scope of the invention.
  • Individual stereoisomers of the compounds of the invention may, for example, be substantially free of other isomers, or may be admixed, for example, as racemates or with all other, or other selected, stereoisomers.
  • the chiral centers of the present invention can have the S or R configuration as defined by the IUPAC 1974 Recommendations.
  • the use of the terms "salt”, “solvate” "prodrug” and the like, is intended to equally apply to the salt, solvate and prodrug of enantiomers, stereoisomers, rotamers, tautomers, racemates or prodrugs of the inventive compounds.
  • Diasteromeric mixtures can be separated into their individual diastereomers on the basis of their physical chemical differences by methods well known to those skilled in the art, such as, for example, by chromatography and/or fractional crystallization.
  • Enantiomers can be separated by converting the enantiomeric mixture into a diasteromeric mixture by reaction with an appropriate optically active compound (e.g., chiral auxiliary such as a chiral alcohol or Mosher's acid chloride), separating the diastereomers and converting (e.g., hydrolyzing) the individual diastereomers to the corresponding pure enantiomers.
  • an appropriate optically active compound e.g., chiral auxiliary such as a chiral alcohol or Mosher's acid chloride
  • some of the compounds of Formulae Ia or Ib may be atropisomers (e.g., substituted biaryls) and are considered as part of this invention. Enantiomers can also be separated by use of chiral HPLC column. Polymorphic forms of the compounds of Formula I, and of the salts, solvates and prodrugs of the compounds of Formula I, are intended to be included in the present invention
  • the present invention also embraces isotopically-labelled compounds of the present invention which are identical to those recited herein, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature.
  • isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorus, fluorine and chlorine, such as 2 H, 3 H, 13 C, 14 C, 15 N, 18 O, 17 O, 31 P, 32 P, 35 S, 18 F 1 and 36 CI, respectively.
  • Certain isotopically-labelled compounds of Formula I e.g., those labeled with
  • 3 H and 14 C are useful in compound and/or substrate tissue distribution assays. Tritiated (i.e., 3 H) and carbon-14 (i.e., 14 C) isotopes are particularly preferred for their ease of preparation and detectability. Further, substitution with heavier isotopes such as deuterium (i.e., 2 H) may afford certain therapeutic advantages resulting from greater metabolic stability (e.g., increased in vivo half-life or reduced dosage requirements) and hence may be preferred in some circumstances, lsotopically labelled compounds of Formula I can generally be prepared by following procedures analogous to those disclosed in the Schemes and/or in the Examples hereinbelow, by substituting an appropriate isotopically labelled reagent for a non-isotopically labelled reagent.
  • the compounds according to the invention have pharmacological properties; in particular, the compounds of Formula I can be useful as ⁇ 2C adrenoreceptor agonists.
  • a preferred dosage is about 0.001 to 500 mg/kg of body weight/day of the compound of Formula I.
  • An especially preferred dosage is about 0.01 to 25 mg/kg of body weight/day of a compound of Formula I, or a pharmaceutically acceptable salt or solvate of said compound.
  • the compounds of this invention may also be useful in combination (administered together or sequentially) with one or more therapeutic agents such as, for example, glucocorticosteroids, PDE-4 inhibitors, anti-muscarinic agents, cromolyn sodium, H 1 receptor antagonists, 5-HTi agonists, NSAIDs, angiotensin-converting enzyme inhibitors, angiotensin Il receptor agonists, ⁇ -blockers, ⁇ -agonists (including both long and short acting), leukotriene antagonists, diuretics, aldosterone antagonists, ionotropic agents, natriuretic peptides, pain management/analgesic agents, anti-anxiety agents, anti-migraine agents, and therapeutic agents suitable for treating heart conditions, psychotic disorders, and glaucoma.
  • therapeutic agents such as, for example, glucocorticosteroids, PDE-4 inhibitors, anti-muscarinic agents, cromolyn sodium, H 1 receptor antagonists, 5-HTi
  • Suitable steroids include prednisolone, fluticasone (including all ester such as the propionate or furcate esters), triamcinolone, beclomethasone, mometasone (including any ester form such as mometasone furoate), budasamine, ciclesonide betamethasone, dexamethasone, prednisone, flunisolide, and cortisone.
  • Suitable PDE-4 inhibitors include roflumilast, theophylline, rolipram, piclamilast, cilomilast and CDP-840.
  • Suitable antiimuscarinic agents include ipratropium bromide and tiatropium bromide.
  • Suitable Hi antagonists include astemizole, azatadine, azelastine, acrivastine, brompheniramine, cetirizine, chlorpheniramine, clemastine, cyclizine, carebastine, cyproheptadine, carbinoxamine, descarboethoxyloratidine, diphenhydramine, doxylamine, dimethindene, ebastine, epinastine, efletirizeine, fexofenadine, hydroxyzine, ketotifen, loratidine, levocabastine, meclizine, fexofenadine, hydroxyzine, ketotifen, loratadine, levocabastine, meclizine, mizolastine, mequitazine, mianserin, noberastine, norastemizole, picumast, pyrilamine, promethazine, terfenadine, tripelen
  • Suitable anti-inflammatory agents include aspirin, diclofenac, diflunisal, etodolac, flurbiprofen, ibuprofen, indomethacin, ketoprofen, ketorolac, nabumetone, naproxen, oxaprozin, piroxicam, sulindac, and tolmetin.
  • Suitable aldosterone antagonists include spironolactone.
  • Suitable ionotropic agents include digitalis.
  • Suitable angiotensin Il receptor agonists include irbesartan and losartan.
  • Suitable diuretics include spironolactone, methyclothiazide, bumetanide, torsemide, hydroflumethiazide, trichlormethiazide, hydroclorothiazide, triamterene, ethacrynic acid, methyclothiazide, hydrochlorothiazide, benzthiazide, hydrochlorothiazide, quinethazone, hydrochlorothiazide, chlorthalidone, furosemide, indapamide, hydroclorothiazide, triamterene, trichlormethiazide, hydrochlorothiazide, amiloride HCI, amiloride HCI, metolazone, trichlormethiazide, bendroflumethiazide, hydrochlorothiazide, polythiazide, hydroflumethiazide, chlorthalidone, and metolazone.
  • Suitable pain management/analgesic agents include Celecoxib, amitriptyline, ibuprofen, naproxen, gabapentin, tramadol, rofecoxib, oxycodone HCI, acetaminophenoxycodone HCI, carbamazepine, amitriptyline, diclofenac, diclofenac, etodolac, fenoprofen calcium, flurbiprofen, ibuprofen, indomethacin, ketoprofen, ketorolac tromethamine, mefenamic acid, meloxicam, nabumetone, naproxen, oxaprozin, piroxicam, sulindac, tolmetin sodium, valdecoxib, diclofenac/ misoprostol, oxycontin, vicodin, darvocet, percocet, morphine sulfate, dilaudid
  • Suitable ⁇ -blockers include acebutolol, atenolol, atenolol/chlorthalidone, betaxolol, bisoprolol fumarate, bisoprolol/HCTZ, labetolol, metoprolol tartrate, nadolol, pindolol, propranolol, propranolol/HCTZ, sotalol, and timolol.
  • Suitable ⁇ -agonists include dobutamine, ritodrine, salbutamol, levalbuterol, metaprotemol, formoterol, fenoterol, bambuterol, brocaterol, clenbuterol, terbutaline, tulobuterol, epinephrine, isoprenalin, and hexoprenalin.
  • Suitable leucotriene antagonists include levamisole.
  • Suitable anti-migraine agents include rovatriptan succinate, naratriptan HCI, rizatriptan benzoate, sumatriptan succinate, zolmitriptan, almothptan malate, methysergide maleate, dihydroergotamine mesylate, ergotamine tartrate, ergotamine tartrate/caffeine, Fioricet ® , Fiorninal ® , Depakene ® , and Depakote ® .
  • Suitable anti-anxiety and anti-depressant agents include amitriptyline HCI, bupropion HCI, citalopram hydrobromide, clomipramine HCI, desipramine, fluoxetine, fluvoxamine maleate, maprotiline HCI, mirtazapine, nefazodone HCI, nortriptyline, paroxetine HCI, protriptyline HCI, sertraline HCI, doxepin, and trimipramine maleate.
  • Suitable angiotensin converting enzyme inhibitors include Captopril, enalapril, enalapril/HCTZ , lisinopril, lisinopril/HCTZ, and Aceon ® .
  • compositions which comprise at least one compound of Formula I, or a pharmaceutically acceptable salt or solvate of said compound and at least one pharmaceutically acceptable carrier.
  • inert, pharmaceutically acceptable carriers can be either solid or liquid.
  • Solid form preparations include powders, tablets, dispersible granules, capsules, cachets and suppositories.
  • the powders and tablets may be comprised of from about 5 to about 95 percent active ingredient.
  • Suitable solid carriers are known in the art, e.g., magnesium carbonate, magnesium stearate, talc, sugar or lactose. Tablets, powders, cachets and capsules can be used as solid dosage forms suitable for oral administration. Examples of pharmaceutically acceptable carriers and methods of manufacture for various compositions may be found in A. Gennaro (ed.), Remington's Pharmaceutical Sciences, 18 th Edition, (1990), Mack Publishing Co., Easton, Pennsylvania.
  • Liquid form preparations include solutions, suspensions and emulsions.
  • solubility enhancing components are described, for example, in U.S. 6,673,337 in colume 2, line 50 to column 3, line 17 and in column 6, line 49 to column 8, line 31 ; US 6,673,337 is expressly incorporated herein by reference.
  • Specific solubility enhancing agents that are excluded in the liquid form preparations include metal carboxymethyl celluloses, metal carboxymethylhydroxy- ethyl celloses, hydroxypropylmethyl celluloses derivative of these compounds, and cyclodextrins.
  • liquid form preparations examples include water or water-propylene glycol solutions for parenteral injection or addition of sweeteners and opacifiers for oral solutions, suspensions and emulsions.
  • Liquid form preparations may also include solutions or suspensions for intranasal administration.
  • composition in a solid dosage form comprising a compound of Formula I or a pharmaceutical acceptable salt, ester, solvate or prodrug thereof and a least one pharmaceutically acceptable carrier, adjuvant or vehicle.
  • a liquid, aqueous pharmaceutical composition is comprising a compound of Formula I or a pharmaceutical acceptable salt, ester, solvate or prodrug thereof and a least one pharmaceutically acceptable carrier, adjuvant or vehicle provided that the adjuvant is not a solubility enhancing component, such as those described in US 6,673,337 (discussed above).
  • a liquid, aqueous pharmaceutical composition is comprising a compound of Formula I or a pharmaceutical acceptable salt, ester, solvate or prodrug thereof and a least one pharmaceutically acceptable carrier, adjuvant or vehicle wherein if a solubility enhancement component is present it is cyclodextrin.
  • Another aspect of this invention is a pharmaceutical formulation that is a nasal spray wherein the pH is equal to or less that about 6.5, more preferably between about 6.1 to 6.2.
  • the formulation is a nasal spray wherein the adjuvants include a suspending agent (e.g., AVICEL (such as AVICIL RC-581 , RC- 591 and CL-611), which are microcrystalline cellulose and carboxymethylcellulose sodium; hydroxypropylmethyl cellulose; methyl cellulose; polyvinyl alcohol; or CARBOPOL) and a humectant (e.g., glycerin, propylene glycol; polyethylene glycol; povidone; or dextrose).
  • AVICEL such as AVICIL RC-581 , RC- 591 and CL-611
  • a humectant e.g., glycerin, propylene glycol; polyethylene glycol; povidone; or dextrose.
  • Aerosol preparations suitable for inhalation may include solutions and solids in powder form, which may be in combination with a pharmaceutically acceptable carrier, such as an inert compressed gas, e.g. nitrogen.
  • a pharmaceutically acceptable carrier such as an inert compressed gas, e.g. nitrogen.
  • solid form preparations that are intended to be converted, shortly before use, to liquid form preparations for either oral or parenteral administration.
  • liquid forms include solutions, suspensions and emulsions.
  • the compounds of the invention may also be deliverable transdermally.
  • the transdermal compositions can take the form of creams, lotions, aerosols and/or emulsions and can be included in a transdermal patch of the matrix or reservoir type as are conventional in the art for this purpose.
  • the compounds of this invention may also be delivered subcutaneously.
  • the compound is administered orally.
  • the pharmaceutical preparation is in a unit dosage form.
  • the preparation is subdivided into suitably sized unit doses containing appropriate quantities of the active component, e.g., an effective amount to achieve the desired purpose.
  • the quantity of active compound in a unit dose of preparation may be varied or adjusted from about 1 mg to about 100 mg, preferably from about 1 mg to about 50 mg, more preferably from about 1 mg to about 25 mg, according to the particular application.
  • the actual dosage employed may be varied depending upon the requirements of the patient and the severity of the condition being treated. Determination of the proper dosage regimen for a particular situation is within the skill of the art. For convenience, the total daily dosage may be divided and administered in portions during the day as required.
  • a typical recommended daily dosage regimen for oral administration can range from about 1 mg/day to about 500 mg/day, preferably 1 mg/day to 200 mg/day, in two to four divided doses.
  • Another aspect of this invention is a kit comprising a therapeutically effective amount of at least one compound of Formula I, or a pharmaceutically acceptable salt or solvate of said compound and a pharmaceutically acceptable carrier, vehicle or diluent.
  • kits comprising an amount of at least one compound of Formula I, or a pharmaceutically acceptable salt or solvate of said compound and an amount of at least one therapeutic agent listed above, wherein the amounts of the two or more ingredients result in desired therapeutic effect.
  • the compound of Formula I or its pharmaceutically acceptable salt, ester, prodrug or ester in its isolated and purified form is also provided.
  • the compounds in the invention may be produced by a variety of processes know to those skilled in the art and by know processes analogous thereto.
  • the invention disclosed herein is exemplified by the following preparations and examples which should not be construed to limit the scope of the disclosure.
  • Alternative mechanistic pathways and analogous structures will be apparent to those skilled in the art. The practitioner is not limited to these methods.
  • One skilled in the art will recognize that one route will be optimized depending on the choice of appendage substituents. Additionally, one skilled in the art will recognize that in some cases the order of steps has to be controlled to avoid functional group incompatability.
  • the prepared compounds may be anyalyzed for their composition and purity as well as characterized by standard analytical techniques such as, for example, elemental anyalysis, NMR, mass spectroscopy and IR spectra.
  • reagents and solvents actually used may be selected from several reagents and solvents well known in the art to be effective equivalents.
  • solvent or reagent it is meant to be an illustrative example of the conditions desirable for that particular reaction scheme and in the preparations and examples described below.
  • VXR-400 (400 MHz, 1 H), Varian Gemini-300 (300 MHz), Varian Mercury VX-400
  • DIPEA diisopropylethylamine
  • NBS n-bromosuccimide
  • TBS t-butyldimethyl silyl
  • the compounds of this invention can be prepared through the general approach outlined in the schemes provided below. These schemes are being provided to illustrate the present invention. While group A is exemplified as an imidazole, other optionally substituted heteroaryl, heterocyclyl and heterocyclenyl rings containing one to three heteroatoms may be used in place of imidazole.
  • the alkenyl imine intermediate G10 can be prepared using the synthetic sequence illustrated in Scheme 1. 3-Methoxythiophene is acylated via Friedel-crafts reaction to provide the dimethoxy ketone compound G2. After demethylation with boron tribromide, the resulting diol G3 is cyclized under the standard Mitsunobu condition to form the cyclized ketone compound G4. This ketone intermediate can be further transformed, after sodium borohydride reduction, protection with TBSCI, and bromination using NBS, to a thienyl bromide G7. Treatment of the thienyl bromide G7 with the Buchwald amination protocol would give the imine-silyl ether intermediate G8.
  • Compounds of Formula I can be prepared from the intermediate G10 via the synthetic pathway outlined in Scheme 2.
  • the imine protection is removed using aqueous hydrogen chloride in THF to reveal the amine product G11 , which is to react in situ with a variety of electrophiles such as chloroformate to generate carbamate G12; or isocyanate to form urea G13; or acid chloride to form amide G14, and or sulfonyl chloride to yield sulfonamide G15.
  • Removal of the trityl protection on the imidazole ring furnishes the alkenyl type of Formula I (e.g., compounds of Formula III).
  • intermediates, G12 - 15, may be alkylated with appropriate halides to install the R b group when needed.
  • Intermediates G12-15 can be converted to the compounds of Formula I, where J is an alkylene group (e.g., compounds of Formula II) by hydrogenation followed by removal of the trityl protecting group.
  • Scheme-2 Modification of Intermediate G10 to form Urea, Amide, and Sulfonamide Derivatives
  • R and R b are independently any of the variable defined in R 7 .
  • 3-Methoxythiophene G1 can also be converted to dimethoxy ketone intermediate G17 via Friedel-Crafts reaction when a longer chain methoxy-alkyl acid is used (Scheme 3).
  • Scheme 3 Upon a further two-step transformation, BBr 3 mediated demethylation and intramolecular Mitsunobu cyclization, cyclic ketone G19 could be obtained.
  • compounds of Formula I, where n>1 could be prepared from G19.
  • Triphenyl phosphine (6.10 g, 23.28 mmol) was added to a stirred solution of diethylazodicarboxylate (3.7 mL, 23.50 mmol) in 100 mL of THF at 0 0 C. After 30 min, this solution was taken up in a syringe, and added dropwise to a stirred solution of diol I3 (3.48 g, 20.24 mmol), prepared from step B above, in 100 mL of THF at 0 0 C. Reaction was continued for 1 h. The mixture was concentrated in vacuo to remove the volatiles.
  • the dihydropyranone 14 (2.43 g, 15.76 mmol) prepared from step C above was dissolved in 100 ml_ of methanol. Sodium borohydride (0.9 g, 23.78 mmol) was added. The mixture was stirred for 1 h at room temperature. H 2 O (50 mL ) was added. Stirring was continued for 15 min, and the mixture was concentrated in vacuo to remove methanol. The aqueous residue was extracted with CH 2 CI 2 (50 mL x 3).
  • Alcohol 15 (0.92 g, 5.89 mmol), available from Step D above, was dissolved in 11 mL of anhydrous benzene at room temperature. Solid triphenylphosphine hydrobromide (2.02 g, 5.89 mmol) was added. The resulting mixture was heated at reflux for 24 h. After cooling, the mixture was diluted with 30 mL of diethyl ether, and filtered through a sintered funnel.
  • the phosphine salt I6 (0.76 g, 1.57 mmol) from Step E above was suspended in 15 mL of anhydrous THF and cooled in a -78°C bath. A 1.8 M solution of phenyl lithium in dibutyl ether (0.87 mL, 1.57 mmol) was added dropwise. After 30 min, temperature of the cooling bath was increased to -10 0 C. Solid 1 -trityl-4-imidazole carboxaldehyde (0.43 g, 1.26 mmol) was added. The mixture was stirred at -10 0 C for 30 min, and continued at room temperature over night.
  • Alkene compound 17 (58 mg, 0.126 mmol), prepared in Step F above, was dissolved in 3 mL of CH 2 Cb. Trifluoroacetic acid (0.2 ml_, 2.60 mmol) was added followed by triethylsilane (20 ⁇ l_, 0.125 mmol). The mixture was stirred at room temperature for 5.5 h, and quenched with a 1.0 M NaOH aqueous solution. The aqueous mixture was extracted with CH 2 CI 2 (30 mL x 3).
  • the TBS-ether compound 19 (4.12 g, 15.24 mmol), prepared in Step A above, was dissolved in 100 ml_ of CH 2 CI 2 . ⁇ /-bromosuccinamide (3.0 g, 16.85 mmol) was added. The mixture was stirred for 25 min at room temperature, and quenched with 75 ml_ of a sat. NaHCO 3 aqueous solution. The two layers were separated, the aqueous layer was extracted with CH 2 CI 2 (50 ml_ x 2).
  • Step C A solid mixture of palladium acetate (0.325 g, 1.45 mmol), ( ⁇ )-BINAP (1.35 g,
  • the phosphine salt 112 (6.85 g, 10.37 mmol), prepared from Step D above, was suspended in 80 mL of anhydrous THF and cooled in a -78°C bath. A 1.8 M solution of phenyl lithium in dibutyl ether (7.2 mL, 12.96 mmol) was added dropwise. After 30 min, temperature rose slightly to -65°C. A solution of 1 -trityl-4-imidazole carboxaldehyde in 45 mL of THF was added slowly. Reaction was continued for 4h while temperature was increased to 0 0 C. Diethyl ether (150 mL) was added.
  • the mixture was filtered through a 1.5-in silica gel pad, rinsing with diethyl ether (50 mL x 3) and CH 2 CI 2 (50 mL x 2).
  • the alkenyl imine compound 113 (474 mg, 0.74 mmol), available from Step E above, was dissolved in 10 mL of THF, and treated with a 3.0 M HCI aqueous solution (0.74 mL, 2.22 mmol). After 1 h, pyridine (0.71 mL, 8.69 mmol) was added followed by methyl chloroformate (0.34 mL, 4.40 mmol). Reaction was continued for 36 h, quenched with H 2 O. The aqueous mixture was extracted with CH 2 CI 2 (50 mL x 3).
  • the alkyl compound 115 (98 mg, 0.183 mmol), prepared from Step A above, was dissolved in 3 mL of CH 2 CI 2 . Trifluoroacetic acid (0.14 mL, 1.82 mmol) and triethylsilane (0.075 mL, 0.47 mmol) were added. The mixture was stirred over night. A sat. NaHC ⁇ 3 aqueous solution was added.
  • Benzylimine intermediate 113 400 mg, 0.626mmol, available from Preparative Example 3 step E, was dissolved in 15 mL of THF, and treated with a 3M HCI aqueous solution (0.63 mL, 1.88 mmol). The mixture was stirred for 40 min at room temperature. Pyridine (0.62 mL, 7.56 mmol) was added followed by acetyl chloride (0.27 mL, 3.78 mmol). Reaction was continued over night. Additional amount of pyridine and acetyl chloride were added, and reaction was allowed to continue for 7h.
  • Efficacy agonist activity values (Emax, GTP ⁇ S assay) for ⁇ 2C were determined by following the general procedure detailed by Umland et. a/ ("Receptor reserve analysis of the human ⁇ 2c -adrenoceptor using [ 35 S]GTP ⁇ S and cAMP functional assays" European Journal of Pharmacology 2001 , 411 , 211 -221 ).
  • the compound of Examples 1 -5 were evaluated and found to be agonists of the ⁇ 2C receptor subtype.

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Abstract

Dans ses nombreux modes de réalisation, la présente invention concerne une nouvelle classe de composés qui sont utiles en tant qu'inhibiteurs des agonistes des récepteurs adrénergiques α2C, des procédés de préparation de tels composés, des compositions pharmaceutiques renfermant un ou plusieurs de ces composés, des procédés de préparation de formulations pharmaceutiques comprenant un ou plusieurs de ces composés et des procédés de traitement, de prévention, d'inhibition ou d'amélioration d'une ou plusieurs affections associées aux récepteurs adrénergiques α2C à l'aide de ces composés ou compositions pharmaceutiques.
PCT/US2008/009366 2007-08-06 2008-08-04 Agonistes des récepteurs adrénergiques alpha2c Ceased WO2009020578A1 (fr)

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WO2012024161A1 (fr) * 2010-08-16 2012-02-23 Allergan, Inc. Procédé d'activation de lymphocytes t régulateurs avec des agonistes du récepteur adrénergique alpha-2b
AU2015255182B2 (en) * 2010-08-16 2017-04-20 Allergan, Inc Method of activating regulatory t cells with alpha-2b adrenergic receptor agonists

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WO2003099795A1 (fr) * 2002-05-21 2003-12-04 Allergan, Inc. Imidazole-2-ones et imidazole-2-thiones 4 substitues comme agonistes des adreno-recepteurs alpha-2b et alpha-2c

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WO1999028300A1 (fr) * 1997-12-04 1999-06-10 Allergan Sales, Inc. Derives imidazoles substitues ayant une activite de type agoniste vis a vis des recepteurs adrenergiques alpha 2b ou 2b/2c
WO2003099795A1 (fr) * 2002-05-21 2003-12-04 Allergan, Inc. Imidazole-2-ones et imidazole-2-thiones 4 substitues comme agonistes des adreno-recepteurs alpha-2b et alpha-2c

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ROSS T M ET AL: "Erratum: [alpha]2 Adrenoceptor agonists as potential analgesic agents. 2. Discovery of 4-(4-imidazo)-1,3-dimethyl-6,7-dihydrothianaphthene as a high- affinity ligand for the [alpha](2D) adrenergic receptor (Journal of Medicinal Chemistry (2000) 43 (765-768))", JOURNAL OF MEDICINAL CHEMISTRY 20000406 US, vol. 43, no. 7, 6 April 2000 (2000-04-06), pages 1423 - 1426, XP002504968, ISSN: 0022-2623 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012024161A1 (fr) * 2010-08-16 2012-02-23 Allergan, Inc. Procédé d'activation de lymphocytes t régulateurs avec des agonistes du récepteur adrénergique alpha-2b
CN103153296A (zh) * 2010-08-16 2013-06-12 阿勒根公司 用α-2B肾上腺素能受体激动剂活化调节T细胞的方法
JP2013534246A (ja) * 2010-08-16 2013-09-02 アラーガン インコーポレイテッド α−２Ｂアドレナリン受容体作動薬を用いて制御性Ｔ細胞を活性化する方法
US8575207B2 (en) 2010-08-16 2013-11-05 Allergan, Inc. Method of activating regulatory T cells with alpha-2B adrenergic receptor agonists
AU2011292296B2 (en) * 2010-08-16 2015-09-03 Allergan, Inc. Method of activating regulatory T cells with alpha-2B adrenergic receptor agonists
US9289420B2 (en) 2010-08-16 2016-03-22 Allergan, Inc. Method of activating regulatory T cells with alpha-2B adrenergic receptor agonists
US9545394B2 (en) 2010-08-16 2017-01-17 Allergan, Inc. Method of activating regulatory T cells with alpha-2B adrenergic receptor agonists
AU2015255182B2 (en) * 2010-08-16 2017-04-20 Allergan, Inc Method of activating regulatory t cells with alpha-2b adrenergic receptor agonists
CN103153296B (zh) * 2010-08-16 2018-02-13 阿勒根公司 用α‑2B肾上腺素能受体激动剂活化调节T细胞的方法
KR20180040710A (ko) * 2010-08-16 2018-04-20 알러간, 인코포레이티드 알파-2b 아드레날린성 수용체 효현제로 조절 t 세포를 활성화시키는 방법
KR101847669B1 (ko) 2010-08-16 2018-05-24 알러간, 인코포레이티드 알파-2b 아드레날린성 수용체 효현제로 조절 t 세포를 활성화시키는 방법
EP3332782A1 (fr) * 2010-08-16 2018-06-13 Allergan, Inc. Procédé d'activation de lymphocytes t régulateurs avec des agonistes du récepteur adrénergique alpha-2b
CN108272797A (zh) * 2010-08-16 2018-07-13 阿勒根公司 用α-2B肾上腺素能受体激动剂活化调节T细胞的方法
KR102013086B1 (ko) 2010-08-16 2019-08-21 알러간, 인코포레이티드 알파-2b 아드레날린성 수용체 효현제로 조절 t 세포를 활성화시키는 방법
CN108272797B (zh) * 2010-08-16 2021-04-27 阿勒根公司 α-2B肾上腺素能受体激动剂的用途

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