WO2004106348A1 - アミノメチル置換フルオロチアゾロベンゾイミダゾール誘導体 - Google Patents
アミノメチル置換フルオロチアゾロベンゾイミダゾール誘導体 Download PDFInfo
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- WO2004106348A1 WO2004106348A1 PCT/JP2004/007655 JP2004007655W WO2004106348A1 WO 2004106348 A1 WO2004106348 A1 WO 2004106348A1 JP 2004007655 W JP2004007655 W JP 2004007655W WO 2004106348 A1 WO2004106348 A1 WO 2004106348A1
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- 125000000304 alkynyl group Chemical group 0.000 claims abstract description 6
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- JUGHOUIZKUEEBN-UHFFFAOYSA-N [1,3]thiazolo[3,2-a]benzimidazole-2-carboxamide Chemical compound S1C(=CN2C1=NC1=C2C=CC=C1)C(=O)N JUGHOUIZKUEEBN-UHFFFAOYSA-N 0.000 claims description 2
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- 229910052722 tritium Inorganic materials 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
- C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
- C07D513/04—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
-
- 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
- A61P25/02—Drugs for disorders of the nervous system for peripheral neuropathies
-
- 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
- A61P25/04—Centrally acting analgesics, e.g. opioids
-
- 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
- A61P25/06—Antimigraine agents
-
- 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
- A61P25/08—Antiepileptics; Anticonvulsants
-
- 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
- A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
- A61P25/16—Anti-Parkinson drugs
-
- 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
- A61P25/22—Anxiolytics
-
- 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
- A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
Definitions
- the present invention relates to a novel aminomethyl-substituted rotiazolobenzimidazole derivative or a salt thereof, which is useful as a medicament.
- Glutamate acts as a neurotransmitter in the mammalian central nervous system
- Glutamate receptors are currently classified into two broad categories based on various pharmacological and physiological studies. One is a receptor with a built-in ion channel, and the other is a metabotropic (metatropic) receptor (Hollmann M. and Heinemann S., Annu. Rev. Neurosc, 17 (1994) 31). -108).
- mGluR metapotropic dalmycin receptor
- mGluR6 does not exist in the brain but only on the retina ( Nakanishi S., Neuron 13 (1995) 1031-1037). MGluR is more selective than glutamate receptors with built-in ion channels. Compounds have been reported (Hayashi Y. et al., Br. J. Pharmacol. 107 (1992) 539-543; Hayashi Y. et al., J. Neurosci. 14 (1995) 3370-3377). Through studies using compounds, the association between mGluR and various disease states has been reported in (1) to (4) below.
- Epilepsy is induced by administration of the mGluR agonist (1S, 3R) —1-aminocyclopentane-1,3-dicarbonic acid (hereinafter referred to as (1S, 3R) -ACPD) (Tizzano JP) et a, Neurosci. Lett., 162 (1993) 12-16; McDonald JW et al., J. Neurosci., 13 (1993) 4445-4455).
- (1S, 3R) -ACPD mGluR agonist of mGluR2
- mGluRI antagonists suppress the leakage of proteins out of dural vessels due to trigeminal ganglion electrical stimulation (WO0V32632). That is, the above reports show that compounds acting on mGluFM are useful for controlling epilepsy, pain, nerve cell death, benzodiazepine withdrawal syndrome, and migraine.
- the mGluFTI antagonist since the efficacy of the mGluRI antagonist has been confirmed in a rat cerebral infarction model, the mGluFTI antagonist is considered to be useful as a prophylactic / therapeutic agent for cerebral infarction (Patent Document 1).
- Patent Document 2 As compounds having an mGluRI antagonistic activity, thiazolobenzimidazole derivatives are disclosed in Patent Documents 1, 2, 3, and Patent Document 4 described above, and Patent Document 4 discloses benzene of thiazo benzobenzimidazole. A compound in which the ring is substituted by bromine and an amino group is disclosed (Example 90). However, the thiazolobenzimidazole derivative of the present invention in which the benzene ring is substituted with a fluorine atom and an aminomethyl group has no specific disclosure in these documents.
- Patent Document 2 reports that a thiazolobenzimidazole derivative in which an amino group is substituted on the benzene ring of the thiazolobenzimidazole ring has a therapeutic effect on neuropathic pain by oral administration.
- Patent Document 2 PCT international publication pamphlet WO O 1/0 8 7 0 5
- An object of the present invention is to provide a novel clinically useful aminomethyl-substituted fluorothiazo oral benzoimidazole derivative and a salt thereof as a metabolic daltime receptor antagonist having excellent oral activity.
- Patent Document 2 has oral activity, it has been confirmed by our research that it has a gene mutation inducing property. It is considered that this gene mutagenicity is expressed due to structural characteristics having an aniline amino group, and a compound having an aniline amino group may have carcinogenicity even if it has oral activity. It has the disadvantage that it cannot be used clinically as a pharmaceutical.
- the present inventors have conducted intensive studies to achieve the above object, and found that the benzene ring of the thiazolobenzoimidazole derivative was substituted with a fluorine atom and substituted aminomethyl, and did not have an aniline-like amino group as a substituent.
- Thiazolobenzimidazole derivatives particularly the aminomethyl-substituted thiazolobenzimidazole derivatives in which the benzene ring has a fluorine atom and an oxygen-containing heterocyclic ring, are known compounds in which a fluorine atom is not substituted L, Patent Documents 1, 3, and 4 Compared to the thiazolobenzimidazole derivative described in (1), it has better activity on metabotropic glumemate receptor, has no risk of carcinogenicity, and has excellent oral activity, especially neuropathic pain due to nerve compression In contrast, the present inventors have found an unexpected effect having excellent oral activity, and have completed the present invention.
- the present invention provides an aminomethyl-substituted rotiazo lipstick represented by the following general formula (I):
- the present invention relates to an azoimidazole derivative or a salt thereof, and a medicament containing them as an active ingredient. Specifically, it is as shown below.
- Alk2 lower alkylene optionally substituted with a oxo group
- n 0 or 1
- X bond, 0, S, or NR 5
- R 3 H, lower alkyl, halogeno lower alkyl, lower alkenyl, lower alkynyl, optionally substituted cycloalkyl, cyano, or saturated heterocyclic ring
- R 2 , R 4 , R 5 , R 6 and R 7 the same or different, H or lower alkyl
- R 1 is oxetane or dioxolane
- R 2 is H
- R 3 is neopentyl
- X is a bond
- R 4 is methyl
- Alk 1 is methylene
- n is 0.
- a pharmaceutical composition comprising, as an active ingredient, the aminomethyl-substituted fluorothiazolobenzimidazole derivative or the pharmaceutically acceptable salt thereof according to (1) to (3).
- a therapeutic agent for neuropathic pain comprising the aminomethyl-substituted fluorothiazolobenzimidazole derivative or the pharmaceutically acceptable salt thereof according to any one of (1) to (3) as an active ingredient.
- a therapeutic agent for neuropathic pain caused by nerve compression comprising the aminomethyl-substituted flurothiazolobene zoimidazole derivative or a pharmaceutically acceptable salt thereof according to any one of (1) to (3) above, More preferably, the neuropathic pain comprising an aminomethyl-substituted flurothiazolobenzimidazole derivative or a pharmaceutically acceptable salt thereof according to any one of (1) to (3) having no gene mutagenicity as an active ingredient. It is a therapeutic agent.
- the present invention further relates to an mGluRI receptor antagonist comprising, as an active ingredient, the aminomethyl-substituted fluorinated rothiazo benzoimidazole derivative or a salt thereof according to any one of the above (1) to (3).
- “Lower alkyl” is C 1-6 alkyl, preferably straight-chain or branched C 1-4 alkyl such as methyl, ethyl, propyl, isopropyl, t-butyl, and more preferably C 1- alkyl. 3 alkyl.
- “Lower alkylene J is C 1-6 alkylene, preferably straight-chain or branched C 1-4 alkylene such as methylene, ethylene, methylmethylene, trimethylene, propylene, ethylethylene, tetrabutylene and the like. Is C 1-3 alkylene.
- the lower alkylene substituted with a oxo group means a group in which any carbon atom of the above lower alkylene is substituted with an oxo group, and is preferably —CH 2 —C (0) —, 1 C (0 ) One CH 2 -,-CH 2 -C (0) one CH 2- , one (CH 2 ) 2 -C (0) one, — C (0) one (CH 2 ) 2- .
- the "lower alkenyl J be a C 2-6 alkenyl, preferably vinyl, pro Beniru, C 2 linear or branched, such as cycloheptenyl 4 alkenyl and more preferably C 2 - a 3 alkenyl.
- lower alkynyl are C 2-6 alkynyl, preferably Echiniru, flop port pinyl, straight or branched C 2-4 alkynyl more preferably C 2 _ 3 alkynyl, such heptynyl.
- Halogen means a halogen atom, for example, a fluorine, chlorine, bromine, or iodine atom.
- octogeno lower alkyl refers to a group in which any one or more hydrogen atoms of the lower alkyl are substituted by the above-mentioned halogen atom, and trifluoylmethyl is preferable.
- Cycloalkyl means a 3- to 8-membered cycloalkyl, preferably cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl and the like.
- “Saturated heterocycle-!” Means a 3- to 8-membered saturated heterocycle containing 1 to 4 heteroatoms selected from a nitrogen atom, an oxygen atom or a sulfur atom, and includes pyrrolidine, piperidine, Piperazine, homopirazine, imidazolidine, morpholine, lactate morpholine, lactate xylane, lactate xetane, chetan, tetrahydrofuran, tetrahydropyran, [1,3] dilute xolan, [4] dilute xane, tetra Lahydrothifenphen, [1,4] dithian, hexahydroazepine, hexahydro-pyrro [2,11c] [1,4] -year-old xazine, and the like.
- Oxygen-containing saturated hetero ring means a saturated hetero ring that always contains an oxygen atom as a hetero atom in the ring among the above-mentioned saturated hetero rings. That is, it means a 3- to 8-membered saturated hetero ring which may contain one or two nitrogen or sulfur atoms in addition to one to three oxygen atoms. Preferably, it is a 4- to 6-membered saturated heterocycle, and more preferably, xetane, tetrahydrofuran, 1,3-dioxolan, tetrahydropyran, and morpholine.
- the “sulfur-containing saturated hetero ring” means a saturated hetero ring containing a sulfur atom as a hetero atom in the ring among the above-mentioned saturated hetero rings. That is, it means a 3- to 8-membered saturated heterocyclic ring which may contain 1 or 2 nitrogen or oxygen atoms in addition to 1 to 3 sulfur atoms. Preferred are 4- to 6-membered saturated heterocycles, and more preferred are chetan, 1,3-dithiolane, tetrahydrothienefen, thiazolidine, and thiaminemorpholine. 1 to 3 carbon atoms or heteroatoms on the ring may be substituted oxygen-containing saturated heterocycles, sulfur-containing saturated heterocycles which may be substituted, or cycloalkyl which may be substituted. May have a substituent.
- the substituent means a usual substituent commonly used in the art for the group to be substituted, and most preferred substituents include halogen, cyano, halogen lower alkyl, lower alkyl, OH, lower alkyl 10-, Oxo, lower alkyl-1 C (0) -1, carboxyl, lower alkyl— 0—C (0) 1, lower alkyl-1 O—lower alkyl—, nitro, even if substituted with 1 or 2 lower alkyls Good amino and the like.
- the compound of the present invention has an optical isomer (optically active substance, diastereomer, etc.) depending on the type of the group.
- the compounds of the present invention include compounds having an amide bond and a double bond, and also include tautomers and geometric isomers.
- the present invention includes a separated form or a mixture of these isomers.
- Salts with acids include mineral acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, phosphoric acid, etc .; formic acid, acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid, Examples thereof include acid addition salts with organic acids such as fumaric acid, maleic acid, lactic acid, malic acid, citric acid, tartaric acid, carbonic acid, picric acid, methanesulfonic acid, ethanesulfonic acid, and glutamic acid.
- mineral acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, phosphoric acid, etc .
- formic acid acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid
- organic acids such as fumaric acid, maleic acid, lactic acid, malic acid, citric acid, tartaric acid, carbonic acid, pic
- salts with bases include inorganic bases such as sodium, potassium, magnesium, calcium, and aluminum; organic bases such as methylamine, ethylamine, medalmine, and ethanolamine; and basic amino acids such as lysine, arginine, and ordinine. Salt and ammonium salt.
- the compound of the present invention can form a hydrate, a solvate with ethanol or the like, or a polymorph.
- the compound of the present invention also includes a pharmacologically acceptable prodrug.
- the group forming a pharmacologically acceptable prodrug of the compound include the group described in Prog. Med. 5: 2157-2161 (1985) and the group described in Hirokawa Shoten 1990 Vol.
- the prodrug include mono OC (O) —optionally substituted lower alkylene—C (O) 0 R (R represents H or lower alkyl, the same applies hereinafter), —OC (0) monosubstituted Lower alkenylene mono C (O) OR, -OC (O) monosubstituted aryl, mono C (O) mono lower alkylene-0-lower alkylene-C (0) OR, — OC (O) one C (O) R, one OC (O) - optionally substituted lower alkyl, one OS 0 2 - optionally substituted lower alkylene - C (0) 0R, one 0-phthalidyl, 5-methyl-1, 3-dioxolen-2-one-4-y
- the compound (1) of the present invention can be produced by the following production method.
- DM F dimethylformamide
- THF tetrahydrofuran
- Production method 1 Production of 4-amino-5-promo 2-furosyl-3-nitrobenzoic acid derivative Nitration
- R 8 represents hydrogen or lower alkyl, R 9 ttC Br, I.
- Production method 1 is a method for producing a dinitroaniline derivative from an aniline derivative.
- Step 1 is the halogenation of the benzene ring. That is, (II) is converted to a solvent such as carbon tetrachloride, chloroform, methylene chloride, 4-dioxane, DMF, DMSO, methanol, acetic acid, bromine, hydrogen bromide, tetrabutylammonium tribromide, etc. (III) can be produced by reacting with a halogenating agent such as an ammonium complex of N, bromosuccinimide, chlorine, or N-chlorosuccinimide under ice-cooling to heating conditions.
- a halogenating agent such as an ammonium complex of N, bromosuccinimide, chlorine, or N-chlorosuccinimide under ice-cooling to heating conditions.
- Step 2 is the acylation of the amino group. That is, (III) is used in an inert solvent such as THF, black porphyrum, dimethyl ether, DMF, acetate nitrile, or an active solvent such as pyridine, acid octride, acid anhydride, active (IV) can be produced by reacting with an acylating agent such as an ester under low-to-warming conditions.
- an inert solvent such as THF, black porphyrum, dimethyl ether, DMF, acetate nitrile, or an active solvent such as pyridine, acid octride, acid anhydride, active (IV)
- an acylating agent such as an ester under low-to-warming conditions.
- Step 3 is the conversion of the benzene ring to a disulfide. That is, (IV) is reacted in a solvent such as sulfuric acid or acetic acid, with a nitrating agent such as nitric acid, potassium nitrate, or acetyl nitrate, or with nitric acid as a solvent under low to room temperature conditions and, if necessary, under heating conditions. By doing this, (V) can be manufactured. In addition, in an inert solvent such as toluene, acetonitrile, THF, or sulfolane, a nitrating agent such as dinitronium tetrachloride is used at low to room temperature conditions, if necessary. (V) can also be produced by reacting under heating conditions.
- a solvent such as sulfuric acid or acetic acid
- a nitrating agent such as nitric acid, potassium nitrate, or acetyl nitrate
- Step 4 is a deacylation reaction by hydrolysis. That is, (VI-a) can be produced by subjecting (V) to a hydrolysis reaction under acidic or alkaline conditions.
- acidic conditions use sulfuric acid, hydrochloric acid, acetic acid, etc.
- alkaline conditions use sodium hydroxide, potassium hydroxide, potassium carbonate, etc., methanol, ethanol, TH
- the reaction is carried out from room temperature to heating in a solvent such as F, acetate and water, a mixed solvent thereof, or no solvent.
- Production method 2 Production of 4-amino-2-fluoro-5-dibenzobenzoic acid derivative
- Production method 2 is a method for producing aminobenzene derivatives from full-year-old robenzene derivatives by the ipso reaction. That is, by reacting (VII) with an alcohol-based solvent such as ethanol and isopropanol, an amine donor such as ammonium chloride or ammonia in a solvent such as DMF, DMSO and water under heating conditions from room temperature. ) Can be manufactured.
- Production method 3 Production of thioxobenzimidazole ring
- Production method 2 is a method for producing a thixobenzimidazole ring from a dinitroaniline derivative.
- Step (2) is a reduction reaction. That is, (VI) is subjected to a catalytic reduction reaction using a metal hornworm medium such as palladium in an inert solvent such as methanol, ethanol, or DMF, in a hydrogen atmosphere, or in the presence of a hydrogen donor such as ammonium formate.
- a metal hornworm medium such as palladium in an inert solvent such as methanol, ethanol, or DMF
- a hydrogen donor such as ammonium formate.
- R 9 is hydrogen
- the reaction is carried out using iron, stannous chloride or the like under acidic conditions such as acetic acid, hydrochloric acid, ammonium chloride or the like.
- (VIII) can also be produced by reacting with a reducing agent such as sodium hydrosulfite in a mixed solvent such as methanol, ethanol, and THF under heating conditions from room temperature.
- Step 2 is a cyclization reaction of a thioxobenzimidazole ring. That is, (VIII) can be prepared by reacting (VIII) with an inert solvent such as methanol, ethanol, or DMF in the presence or absence of a base such as triethylamine, carbon disulfide, 1,1'-thiamine carbonyldiimidazole, titani carbonate, etc. (IX) can be produced by reacting
- step 2 can be continued.
- Yes Production method 4: Production of thiazolobenzimidazole ring
- Production method 4 is a method for producing a thiazolobenzimidazole ring from a thioxobenzimidazole ring.
- Step 1 is an alkylation reaction. That is, (IX) and a-octaacetic acid derivative were treated with an alcoholic solvent such as ethanol or methanol, or an inert solvent such as DMF, THF, or acetonitrile in sodium methoxide or sodium methoxide.
- the reaction of (X) by heating at room temperature to heating in the presence or absence of a base such as trioxide, hydroxyl sodium, potassium hydroxide, sodium hydride, potassium carbonate, and sodium hydrogen carbonate. Can be manufactured.
- Step 2 is a cyclization reaction. That is, sodium (ethoxide) and potassium ethoxide are mixed with (X) and a formylating agent such as formate or formic anhydride in an alcoholic solvent such as ethanol or methanol, or in an inert solvent such as DMF, HF, or acetonitrile.
- (XI) can be produced by reacting from room temperature to heating under basic conditions such as sodium hydroxide, sodium hydride, pyridine and triethylamine. This (XI) may take the equilibrium state of Equation 1 in the solution state. (Equation 1)
- Step 3 is an isomerization reaction of a dihydrothiazolobenzimidazole ring. That is, after (XI) is prepared in the form of a solution or suspension in the form of an equilibrium mixture represented by the formula 1, this is treated under acidic conditions such as hydrochloric acid, sulfuric acid, acetic acid, and trifluroacetic acid to precipitate (XII). Can be.
- acidic conditions such as hydrochloric acid, sulfuric acid, acetic acid, and trifluroacetic acid to precipitate (XII).
- Step 4 is a dehydration reaction from a dihydrothiazolobenzoimidazole ring to a thiazolobenzoimidazole ring. That is, (XII) can be produced by reacting (XII) with an acid such as concentrated sulfuric acid, acetic acid, or trifluroacetic acid from room temperature under heating conditions. In addition, in an inert solvent such as toluene or benzene, under acidic conditions such as p-toluenesulfonic acid or camphorsulfonic acid, or in the presence of a dehydrating agent such as molecular sieves if necessary, or Dean-Stark dehydration. (XIII) can also be produced by reacting from room temperature to heating under dehydration reaction conditions in an apparatus or the like. Process 5: Reduction of carboxylic acid
- Production method 5 is an ordinary method for producing an alcohol compound by reduction of a carboxylic acid.
- Process 6 is the hydrolysis of an ester. That is, (XV) can be produced by subjecting (XIV) to a hydrolysis reaction under acidic conditions or alkaline conditions.
- acidic conditions use sulfuric acid, hydrochloric acid, acetic acid, etc.
- alkaline conditions use sodium hydroxide, potassium hydroxide, potassium carbonate, etc., to obtain methanol, ethanol, THF, acetate nitrile,
- the reaction is carried out in a solvent such as water, a mixed solvent thereof, or no solvent at room temperature to heating.
- Production Method 7 Amidation k 2 ) n _ X -R
- Production method 7 is a usual amidation reaction of a carboxylic acid. That is, (XV) is converted into dicyclohexyl carbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide, diphenylphosphoryl triazide, in an inert solvent such as DMF, THF, 1,2-dichloroethane, and chloroform.
- (XVI) can be produced by activating with a condensing agent such as 1,1'-carboxyl 1H- ⁇ T midazole or 1-hydroxybenzotriazole, and reacting the activated form with the corresponding amine.
- Production method 8 is an oxidation reaction of an alcohol to an aldehyde. That is, (XVI) can be produced by reacting (XVI) with sulfur trioxide / pyridine complex under ice-cooling to room temperature conditions using DMSO as a solvent. (XV II) can also be produced by ordinary oxidation reactions such as SWERN oxidation, chromic acid oxidation, and permanganic acid oxidation. Process 9: Reductive amination — X— R 3
- (XV II) to (I) are ordinary reductive amination reactions. That is, (XV II) is converted into a solvent such as methylene chloride, 12-dichloroethane, chloromethium, THF, methanol, or ethanol, and if necessary, an acid catalyst such as acetic acid or hydrochloric acid, or titanium tetraisopropoxide. In the presence of a corresponding amine with a reducing agent such as sodium triacetoxyborohydride, sodium cyanoborohydride, sodium borohydride, etc. Thus, (I) can be manufactured.
- a solvent such as methylene chloride, 12-dichloroethane, chloromethium, THF, methanol, or ethanol
- an acid catalyst such as acetic acid or hydrochloric acid, or titanium tetraisopropoxide.
- a corresponding amine with a reducing agent such as sodium triacetoxyborohydride, sodium cyanoborohydride, sodium boro
- (I) is obtained by reacting (XVII) with the corresponding amine in an inert solvent such as toluene or benzene, if necessary, using a dehydrating agent such as molecular sheep or a dehydration reaction using a Dean Stark dehydrator.
- the imine is reacted under a warming condition from room temperature, and treated with a reducing agent such as sodium borohydride in a solvent such as methanol or ethanol, or in a mixed solvent with the above reaction solvent.
- a reducing agent such as sodium borohydride
- solvent such as methanol or ethanol
- (I) can be produced by using a metal catalyst such as palladium under ordinary catalytic reduction conditions, specifically, a hydrogen atmosphere.
- the compound of the present invention produced in this manner is isolated or purified as free or as a salt thereof.
- Isolation and purification are performed by applying ordinary chemical operations such as extraction, concentration, evaporation, crystallization, filtration, recrystallization, and various types of chromatography.
- Various isomers can be separated by selecting an appropriate starting compound or by utilizing a difference in physical properties between the isomers.
- the optical isomers can be stereochemically selected by selecting appropriate raw materials or by a racemic resolution method of a racemic compound (for example, a method of optically resolving a diastereomer salt with a general optically active base). It can lead to a pure isomer.
- a preparation containing one or more of the compound of the present invention or a salt thereof as an active ingredient is prepared using a carrier, an excipient, and other additives which are usually used for preparation of a preparation.
- the carrier or excipient for the preparation may be solid or liquid, for example, lactose, magnesium stearate, starch, talc, gelatin, agar, pectin, arabic gum, leabe oil, sesame oil, cocoa butter, ethylene Glycols and the like are also commonly used.
- Administration may be in the form of tablets, pills, capsules, granules, powders, liquids, etc., oral administration, intravenous injection, intramuscular injection, parenteral administration, suppositories, transdermal, etc. Good.
- the dose is determined as appropriate depending on the individual case, taking into account the symptoms, age, sex, etc. of the administration subject, but it is usually 1 to 100 mg / day, preferably 50 to 100 mg / day for an adult. 2 Oral dose in the range of OO mg once or several times a day or iv in a dose of 1 to 50 mg per adult per day, once to several times a day Or continuous intravenous administration for 1 hour to 24 hours per day.
- the one or more active substances include at least one inert diluent, such as lactose, mannitol, glucose, hydroxypropyl cellulose, microcrystalline cellulose, starch, polyvinyl. It is mixed with pyrrolidone and magnesium aluminate metasilicate.
- the composition may contain additives other than inert diluents, such as lubricants such as magnesium stearate, disintegrants such as starch, calcium cellulose dalcholate, and stable agents such as lactose. It may contain a solubilizing agent such as an agent, dartamic acid or aspartic acid. If necessary, tablets or pills may be coated with sugar coating such as sucrose, gelatin, hydroxypropylcellulose, hydroxypropylmethylcellulose phthalate or the like, or with a film of gastric or enteric substance.
- lubricants such as magnesium stearate
- disintegrants such as starch, calcium cellulose dalcholate
- stable agents such as lactose.
- solubilizing agent such as an agent, dartamic acid or aspartic acid.
- tablets or pills may be coated with sugar coating such as sucrose, gelatin, hydroxypropylcellulose, hydroxypropylmethylcellulose phthalate or the like, or with a film of gastric or enter
- Liquid compositions for oral administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups, elixirs and the like, and commonly used inert diluents such as purified Contains water and ethanol.
- the composition may contain, in addition to the inert diluent, adjuvants such as wetting agents and suspending agents, sweetening agents, flavoring agents, fragrances, and preservatives.
- Injections for parenteral administration include sterile aqueous or non-aqueous solutions, suspensions, and emulsions.
- Aqueous solutions and suspensions include, for example, distilled water for injection and physiological saline.
- water-insoluble solutions and suspensions examples include propylene glycol, polyethylene glycol, vegetable oils such as crude oil, alcohols such as ethanol, and polysorbate 80.
- Such compositions may also contain adjuvants such as preserving, wetting, emulsifying, dispersing, and stabilizing agents (eg, lactose) and solubilizing agents (eg, glutamic acid, aspartic acid). May be included. These are sterilized by, for example, filtration through a pateria retaining filter, blending of a bactericide or irradiation. In addition, these can be used by producing a sterile solid composition and dissolving it in sterile water or a sterile injection solvent before use.
- MS mass spectrometry (FAB +: cation fast atom bombardment mass spectrometry, FAB-: anion fast atom bombardment mass spectrometry, ES +: cation electrospray ionization, ES-: anion electrospray ionization.
- M molecular weight
- the crystallized residue was recrystallized from hexane (50 ml) and ethyl acetate (10 ml), filtered and washed with a mixed solvent of hexane and ethyl acetate (mixing ratio: 10: 1). The obtained crystals were dried under reduced pressure while heating at 50 ° C to give the title compound (10.1 g).
- Acetyl chloride (104.4 ml) was added to a THF (800 ml) solution of the compound (128.27 g) of Reference Example 1 under ice-cooling. And stirred at room temperature for 24 hours. After completion, the reaction solution was concentrated under reduced pressure, and extracted with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium hydrogen carbonate and saturated saline, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. Ethyl acetate (200 ml) was added to the crystallized residue, and the mixture was dissolved by heating under reflux, and then hexane (250 ml) was added for crystallization.
- the precipitated crystals were collected by filtration and washed with a mixed solvent of hexane and ethyl acetate (mixing ratio: 3: 1). The obtained crystals were dried under reduced pressure at 50 ° C. while heating to obtain the title compound (140.5 g).
- the compound of Reference Example 3 (88.4 g) was dissolved in a mixed solvent of concentrated hydrochloric acid and acetic acid (mixing ratio 1: 1, 1 L), followed by stirring in a 100 ° C. oil bath for 24 hours. After completion, the reaction solution was ice-cooled and poured into ice water (4 L). The precipitated crystals were collected by filtration, washed with water, and dried under reduced pressure at 70 ° C. while heating to obtain the title compound (65.2 g).
- the compound of Reference Example 8 (15.5 g) was dissolved in concentrated sulfuric acid (50 ml), and the mixture was stirred in an oil bath at 45 ° C for 4 hours. After completion, the reaction solution was ice-cooled and then dispersed in ice-cooled ethyl acetate (400 ml). The precipitated crystals were collected by filtration, washed with ethyl acetate, and dried under reduced pressure while heating at 60 ° C. to give the title compound (14.5 g).
- the compound of Reference Example 9 (14.5 g) was suspended in acetonitrile (150 ml), and 1,1′-carboxydiimidazole (17.4 g) was added at room temperature under an argon atmosphere. After the addition, the reaction mixture was stirred at room temperature for 3 hours. Subsequently, the reaction mixture was ice-cooled, sodium borohydride (4.05 g) /0.1% aqueous sodium hydroxide solution (20 ml) was added, and the mixture was stirred for 5 hours while cooling on ice, and further heated to room temperature and stirred for 4 hours. did. After completion, concentrated hydrochloric acid (25.3 g) and water (230 ml) were added to the reaction suspension,
- the compound of Reference Example 10 (7.95 g) was suspended in a 40% aqueous solution of acetonitrile (100 ml), added to a 1 M aqueous sodium hydroxide solution (32 ml) under ice cooling, and stirred at room temperature for 4 hours. After completion, a 1 M aqueous hydrochloric acid solution (32 ml) was added to the reaction solution, and the mixture was cooled on ice, and the precipitated crystals were collected by filtration. The collected residue was washed with water, and dried under reduced pressure while heating at 60 ° C to obtain the title compound (6.49 g).
- the reaction solution was extracted with chloroform, and the organic layer was washed with water and saturated saline, dried over anhydrous sodium sulfate, and concentrated under reduced pressure.
- the crystallized residue was recrystallized from ethanol and ethyl acetate, and the obtained crystals were collected by filtration.
- the crystals were washed with a mixed solvent of ethanol and ethyl acetate (mixing ratio: 1.3), and dried under reduced pressure at 60 ° C under heating to obtain the title compound (3.65 g).
- 2,4-Difluoro-5-dibenzobenzoic acid (26.29 g) was dissolved in a concentrated aqueous ammonia solution (500 ml), and the reaction mixture was stirred at room temperature for 4 hours. After completion, the mixture was concentrated under reduced pressure. Ethanol was added to the residue, and the mixture was concentrated again under reduced pressure. The residue was washed with water and a small amount of ethanol, and dried under reduced pressure to obtain the title compound (26.38 g).
- Reference Example 18 Water (30 ml) and a 1 M aqueous solution of sodium hydroxide (26.1 ml) were added to a suspension of the compound of Example 8 (6.40 g) in acetonitrile (50 ml). The mixture was stirred at room temperature for 6 hours. After completion, a 1 M aqueous hydrochloric acid solution (26.1 ml) was added to the reaction mixture, and the mixture was stirred at room temperature for 30 minutes. The insolubles were collected by filtration, washed with water and acetate nitrile, and dried under reduced pressure to obtain the title compound (5.69 g).
- Acetic anhydride (81.4 ml) was added to a solution of ethyl 4-amino-3-fluorobenzoate (31.88 g) in pyridine (300 ml) and the mixture was stirred for 72 hours. Water (30 ml) was added thereto, and the mixture was further stirred at room temperature for 30 minutes. After completion, the mixture was concentrated under reduced pressure. The residue was partitioned between ethyl acetate and water. The aqueous layer was separated and extracted with ethyl acetate.
- Triethylamine (3.36 ml) was added to the mixture, and the mixture was further stirred for 1 hour in a 40 ° C oil bath. After completion, the reaction mixture was concentrated under reduced pressure. The residue was diluted with water, and then adjusted to acidic with 1 M aqueous hydrochloric acid. The precipitate was collected by filtration, washed with water, and dried under reduced pressure to give the title compound (4.93 g).
- Acetic acid (206I), 3-aminosixetane hydrochloride (267 mg), and triethylamine (301 1) were added to a dichloroethane solution (15 ml) of the compound of Reference Example 12 (250 mg), and the mixture was stirred at room temperature for 2 hours. . Subsequently, sodium triacetoxyborohydride (458 mg) was added, and the mixture was stirred at room temperature for 14 hours. Further, triacetoxy sodium borohydride (458 mg) was added, and the mixture was stirred at room temperature for 4.5 hours. After completion of the reaction, a 1 M aqueous solution of sodium hydroxide was added to the reaction solution, followed by extraction with a 5% methanol / chloroform solution and concentration under reduced pressure.
- Acetic acid (123 1) and (1,3-dioxolan-12-yl) methylamine (122iUl) were added to a dichloroethane solution (10 ml) of the compound of Reference Example 12 (150 mg), and stirred at room temperature for 2.5 hours. did. Subsequently, sodium triethoxy borohydride (274 mg) was added, and the mixture was stirred at room temperature for 14 hours. Further, sodium triacetoxyborohydride (274 mg) was added, and the mixture was stirred at room temperature for 4.5 hours. After completion, a 1 M aqueous sodium hydroxide solution was added to the reaction solution, and the mixture was extracted with a 5% methanol / chloroform solution and concentrated under reduced pressure.
- the effect of the compound of the present invention on mGluRI was confirmed according to the method described in Patent Document 3.
- the effect of the compound of the present invention is that of 6-amino N-cyclohexyl N, 3-dimethylthiazolo [3,2-a] benzimidazo mono-l-2-loxaboxamide, which has a selective and potent action on mGluRI.
- Tritium label (specific activity: 81 Ci / mmol Five
- Rats (Wistar, male, 9-12 weeks old) were decapitated and the cerebellum was removed. The weight was measured and homogenized with 7-10 volumes of 0.32 M sucrose solution. After centrifugation at 900 xg for 15 minutes, the supernatant was stored in another container (on ice). The sediment was homogenized again with the same amount of 0.32 M sucrose solution as in the first run, and centrifuged at 900 X g for 15 minutes. The supernatant obtained at this time and the supernatant obtained above were combined and subjected to eccentricity at 15,000 X g for 20 minutes. The pellet was homogenized with 5 mM Tris-HCI, pH 7.4, and centrifuged at 15,000 xg for 15 minutes.
- the pellet was homogenized with 50 mM Tris-HCU pH 7.4 and centrifuged at 15,000 xg for 15 minutes.
- the precipitate was homogenized with an appropriate amount of 50 mM Tris-HCl, pH 7.4, aliquoted and stored at -80 ° C.
- Test Example 2 Suppressive effect on neuropathic pain
- the experiment was performed by modifying a part of the report (Pharmacol Biochem Behav 39, 541-544, 1991). Intraperitoneal administration of 200 mg / kg STZ to 4-week-old ICR mice. Two weeks after administration, a pre-test of the tail pinch test was performed in the afternoon, and only animals with a reaction latency of 3 seconds or less were subjected to the next day's experiment.
- Control compounds A, B, and C were selected as compounds having a substituted aminomethyl group on the benzene ring of thiazolobenzoimidazole.
- control compounds A and B were orally administered at 100 mg / kg and evaluated in the same manner.
- mice not loaded with STZ show an average response latency of 6-7 seconds in this test.
- the STZ-loaded mice used in this study were those with a response latency of 3 seconds or less, where a clear decrease in pain threshold was observed.
- Control Compound C Compound disclosed in Patent Document 4 and Example 113 The above test confirmed that the compound of the present invention is a compound that specifically binds to mGIuR1.
- the compound of the present invention showed an average response latency difference of 2 seconds or more in all cases of oral administration at 10 mg / kg, confirming that it has a therapeutic effect on neuropathic pain due to diabetes.
- control compounds A and B had an average response latency difference of less than about ⁇ seconds when administered orally at 100 mg / kg.
- the compound of the present invention is a compound which is at least 10 times more orally active than the control compounds A and B and is useful as an oral preparation.
- control compound C showed a response latency difference of 2 seconds or more.
- the left lumbar nerve (L5 and L6) was ligated with a silk thread under pentovalpital anesthesia.
- the drug was orally administered at 10 mg / kg, and 30 minutes later, a von Frey hair (VFH) test was performed to determine the pain threshold for mechanical nociceptive stimulus.
- the measurements were performed on the left and right hind limbs.
- the pain threshold of the sham operation rat was 17-20 g (log (g): 1.23-1.30) on average, with no difference between left and right.
- the L5 / L6 spinal nerve ligation rat operation Decreased pain thresholds for mechanical noxious stimuli were found in the lateral paws.
- the significance test was performed using the Dunnett method between the control group and the drug administration group on each of the right and left feet.
- Control compound D Patent document 2, compound A
- the compound of the present invention shown in Table 3 is about 8 to 50 times or more that of control compound C which showed a response latency difference of 2 seconds or more in an STZ-induced diabetes model. The effect was shown.
- the compound of the present invention showed 4- to 30-fold the action of control compound D having an aniline-like amino group, which was confirmed in Patent Document 2 to have an action of lowering the pain threshold due to nerve compression.
- the gene mutagenicity of the compound of the present invention was confirmed by a reverse mutation test using bacteria.
- test method was performed by the preincubation method in the presence and absence of a metabolic activation system in accordance with the guidelines for testing genotoxicity of drugs (Pharmaceutical Affairs Council No. 1604, January 1, 2001).
- test strain was performed by the preincubation method in the presence and absence of a metabolic activation system in accordance with the guidelines for testing genotoxicity of drugs (Pharmaceutical Affairs Council No. 1604, January 1, 2001).
- test tube To the test tube, add 0.1 mL of 0.1 M sodium phosphate buffer (pH 7.4), 0.5 mL of the test bacterium suspension cultured overnight, and 0.1 mL of the test substance solution, and shake at 37 for 20 minutes (60 reciprocations / minute). ), 2 mL of soft agar kept at about 45 ° C was added, spread on a minimal glucose agar plate (plate), and cultured at 37 ° C for about 48 hours. In the case of the metabolic activation test, the same operation was performed by adding the same amount of S9Mix instead of 0.1 M sodium phosphate buffer.
- S9 Mix used for metabolic activation test was S-9 / cofactor A set (9000Xg supernatant of rat liver homogenate induced with drug metabolizing enzyme with phenobarbital and 5,6-benzoflavone) and Cofactor, Ames test, Oriental yeast
- the amount of S9 in S9Mix was 0.1 mL / mL.
- the solvent used was dimethylsulphate.
- the compounds of Example 1 and Example 2 did not have gene mutagenicity.
- the control compound D having an aniline-like amino group had mutagenicity. From these results, the compound of the present invention has no anilinic amino group and therefore does not have gene mutagenicity, and has excellent oral activity that cannot be predicted from Patent Documents 1 to 4, especially suppression of neuropathic pain due to nerve compression. The effect was confirmed. The invention's effect
- the compound of the present invention is a compound having a strong action on the metabolic daltamet receptor and excellent in activity of Jiangro, and can be used for oral administration.
- the compound of the present invention is a disease in which mGluRI receptor is considered to be involved, for example, Epilepsy, pain, suppression of neuronal cell death, benzodiazepine withdrawal syndrome, Parkinson's disease, migraine, anxiety disorder, cerebral infarction (preferably an agent for preventing the development of infarct lesions administered during acute phase of cerebral infarction) or neuropathic pain (preferably Is useful as a prophylactic / therapeutic agent for diabetic neuropathic pain, postherpetic neuralgia, cancer pain, and postoperative pain.
- mGluRI receptor is considered to be involved, for example, Epilepsy, pain, suppression of neuronal cell death, benzodiazepine withdrawal syndrome, Parkinson's disease, migraine, anxiety disorder, cerebral infarction (preferably an agent for preventing the development of infarct lesions administered during acute phase of cerebral infarction) or neuropathic pain (preferably Is useful as a prophylactic / therapeutic agent for diabetic neuropathic pain, postherpetic neuralgia,
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009501146A (ja) * | 2005-06-23 | 2009-01-15 | アレイ バイオファーマ、インコーポレイテッド | ベンズイミダゾール化合物の調製方法 |
US8329914B2 (en) | 2008-10-31 | 2012-12-11 | Merck Sharp & Dohme Corp | Cyclic benzimidazole derivatives useful as anti-diabetic agents |
US8563746B2 (en) | 2008-10-29 | 2013-10-22 | Merck Sharp & Dohme Corp | Cyclic benzimidazole derivatives useful as anti-diabetic agents |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1999044639A1 (fr) * | 1998-03-03 | 1999-09-10 | Yamanouchi Pharmaceutical Co., Ltd. | Medicaments contre l'infarcissement du cerveau |
JP2000351782A (ja) * | 1999-04-06 | 2000-12-19 | Yamanouchi Pharmaceut Co Ltd | メタボトロピックグルタメート受容体作用薬及び新規チアゾロベンゾイミダゾール誘導体 |
WO2001008705A1 (fr) * | 1999-08-02 | 2001-02-08 | Yamanouchi Pharmaceutical Co., Ltd. | Remedes contre les douleurs neurogenes |
WO2003078441A1 (fr) * | 2002-03-20 | 2003-09-25 | Yamanouchi Pharmaceutical Co., Ltd. | Derive de thiazolobenzimidazole substitue par aminomethyle |
-
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- 2004-05-27 WO PCT/JP2004/007655 patent/WO2004106348A1/ja active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
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WO1999044639A1 (fr) * | 1998-03-03 | 1999-09-10 | Yamanouchi Pharmaceutical Co., Ltd. | Medicaments contre l'infarcissement du cerveau |
JP2000351782A (ja) * | 1999-04-06 | 2000-12-19 | Yamanouchi Pharmaceut Co Ltd | メタボトロピックグルタメート受容体作用薬及び新規チアゾロベンゾイミダゾール誘導体 |
WO2001008705A1 (fr) * | 1999-08-02 | 2001-02-08 | Yamanouchi Pharmaceutical Co., Ltd. | Remedes contre les douleurs neurogenes |
WO2003078441A1 (fr) * | 2002-03-20 | 2003-09-25 | Yamanouchi Pharmaceutical Co., Ltd. | Derive de thiazolobenzimidazole substitue par aminomethyle |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009501146A (ja) * | 2005-06-23 | 2009-01-15 | アレイ バイオファーマ、インコーポレイテッド | ベンズイミダゾール化合物の調製方法 |
EP1904481A4 (en) * | 2005-06-23 | 2010-11-10 | Array Biopharma Inc | PROCESS FOR THE PREPARATION OF BENZIMIDAZOL COMPOUNDS |
US8039637B2 (en) | 2005-06-23 | 2011-10-18 | Array Biopharma Inc. | Process for preparing benzimidazole compounds |
US8383832B2 (en) | 2005-06-23 | 2013-02-26 | Array Biopharma Inc. | Process for preparing benzimidazole compounds |
US8501956B2 (en) | 2005-06-23 | 2013-08-06 | Array Biopharma Inc. | Benzimidazole compounds |
US9024040B2 (en) | 2005-06-23 | 2015-05-05 | Array Biopharma Inc. | Processes for preparing benzimidazole compounds |
US8563746B2 (en) | 2008-10-29 | 2013-10-22 | Merck Sharp & Dohme Corp | Cyclic benzimidazole derivatives useful as anti-diabetic agents |
US8329914B2 (en) | 2008-10-31 | 2012-12-11 | Merck Sharp & Dohme Corp | Cyclic benzimidazole derivatives useful as anti-diabetic agents |
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