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【结 构 式】

【分子编号】38521

【品名】methyl (3R,6S,9R,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate

【CA登记号】

【 分 子 式 】C11H18N2O3S

【 分 子 量 】258.3416

【元素组成】C 51.14% H 7.02% N 10.84% O 18.58% S 12.41%

与该中间体有关的原料药合成路线共 4 条

合成路线1

该中间体在本合成路线中的序号:(XIa)

Treatment of 5-methylpyridine-2-carbonitrile (I) with ethanol and sulfuric acid gave ester (II), which was further hydrolyzed to carboxylic acid (III) using aqueous HCl. Hydrogenation of the pyridine ring of (III) over PtO2 yielded a 3:1 mixture of cis and trans piperidines as the corresponding hydrochloride salts (IV). Liberation of the free base by means of Et3N in a suspension in CH2Cl2 allowed the separation of the racemic cis isomer, which was N-acylated with Ac2O to give acetamide (V). Esterification of (V) with isobutylene in the presence of H2SO4 afforded the tert-butyl ester (VI). The electrochemical oxidation of (VI) in MeOH produced the 6-methoxy piperidine (VII). Ring opening of the piperidine (VII) with formation of the thiazolidine ring upon treatment with methyl L-cysteinate (VIII) generated the tert-butoxycarbonylbutyl thiazolidine (IXa-h) as a complex mixture of diastereoisomers. After cleavage of the tert-butyl ester of (IXa-h) with trifluoroacetic acid, cyclization using 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ) gave rise to the thiazoloazepine bicyclic system (Xa-d). Column chromatography of the resulting diastereomeric mixture provided the (6S,9R) and (6S,9S) isomers in a 1:2 ratio. Hydrolysis of this mixture with methanolic HCl yielded the bicyclic amine (XIa-b). Coupling of (XIa-b) with (2S,3S)-2-acetylthio-3-methylpentanoic acid (XII) gave the corresponding mixture of amides, from which the desired isomer (XIII) was isolated by column chromatography. Finally, hydrolysis of methyl ester and tioacetate ester groups of (XIII) using LiOH gave rise to the title compound.

1 Oinuma, H.; Suda, S.; Yoneda, N.; Kotake, M.; Mizuno, M.; Matsuhima, T.; Fukuda, Y.; Saito, M.; Matsuoka, T.; Adachi, H.; Namiki, M.; Sudo, T.; Miyake, K.; Okita, M. (Eisai Co., Ltd.); Substd. thiazolo[3,2-alpha]azepine deriv.. EP 0719779; JP 1996027156; JP 1996059672; JP 1996165293; US 5789403; WO 9602549 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IXa) 38509 methyl (2S,4R)-2-[(1R,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXb) 38510 methyl (2S,4R)-2-[(1R,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXc) 38511 methyl (2R,4R)-2-[(1R,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXd) 38512 methyl (2R,4R)-2-[(1R,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXe) 38513 methyl (2S,4R)-2-[(1S,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXf) 38514 methyl (2S,4R)-2-[(1S,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXg) 38515 methyl (2R,4R)-2-[(1S,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXh) 38516 methyl (2R,4R)-2-[(1S,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(Xa) 38517 methyl (3R,6S,9R,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(Xb) 38518 methyl (3R,6R,9R,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(Xd) 38520 methyl (3R,6R,9S,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(XIa) 38521 methyl (3R,6S,9R,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情
(XIb) 38522 methyl (3R,6S,9S,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情
(I) 38502 5-methyl-2-pyridinecarbonitrile C7H6N2 详情 详情
(II) 38503 ethyl 5-methyl-2-pyridinecarboxylate C9H11NO2 详情 详情
(III) 38504 5-methyl-2-pyridinecarboxylic acid C7H7NO2 详情 详情
(IV) 38505 5-methyl-2-piperidinecarboxylic acid C7H13NO2 详情 详情
(V) 38506 (2S,5S)-1-acetyl-5-methyl-2-piperidinecarboxylic acid C9H15NO3 详情 详情
(VI) 38507 tert-butyl (2S,5S)-1-acetyl-5-methyl-2-piperidinecarboxylate C13H23NO3 详情 详情
(VII) 38508 tert-butyl (2S,5S)-1-acetyl-6-methoxy-5-methyl-2-piperidinecarboxylate C14H25NO4 详情 详情
(VIII) 27413 methyl (2R)-2-amino-3-sulfanylpropanoate C4H9NO2S 详情 详情
(XII) 35122 (2S,3S)-2-(acetylsulfanyl)-3-methylpentanoic acid C8H14O3S 详情 详情
(XIII) 38523 methyl (3R,6S,9R,9aR)-6-[[(2S,3S)-2-(acetylsulfanyl)-3-methylpentanoyl]amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C19H30N2O5S2 详情 详情
(Xc) 38519 methyl (3R,6S,9S,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XXXIII)

In a related method, L-pipecolic acid (XXVI) was protected as the methyl carbamate, followed by esterification with isobutylene to give (XXVII). Oxidation of (XXVII) with NaIO4 in the presence of RuO2 generated the 6-oxopipecolic acid derivative (XXVIII), which was subsequently methylated to yield (XXIX) as the major diastereoisomer. Reduction of (XXIX) with DIBAL afforded the cyclic aminal (XXX). Condensation of (XXX) with methyl L-cysteinate (VIII) gave thiazolidine (XXXIa-b). After tert-butyl ester cleavage in (XXXIa-b) with trifluoroacetic acid, cyclization by means of EEDQ produced the bicyclic system (XXXII). Deprotection of the methyl carbamate group of (XXXII) was carried out using methanesulfonic acid in the presence of dimethyl sulfide to afford amine (XXXIII). Coupling of (XXXIII) with (2S,3S)-2-acetylthio-3-methylpentanoic acid (XII) gave the corresponding mixture of amides, from which the desired isomer (XIII) was isolated by column chromatography. Finally, hydrolysis of methyl ester and tioacetate ester groups of (XIII) using LiOH gave rise to the title compound.

1 Oinuma, H.; Kotake, M.; Suda, S.; et al.; Discovery of a novel and orally active dual inhibitor of NEP and ACE: Synthesis and pharmacology. 217th ACS Natl Meet (March 21 1999, Anaheim) 2000, Abst MEDI 111.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XXXIa) 38528 methyl (2R,4R)-2-[(1R,4S)-5-(tert-butoxy)-4-[(methoxycarbonyl)amino]-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O6S 详情 详情
(XXXIb) 38529 methyl (2S,4R)-2-[(1R,4S)-5-(tert-butoxy)-4-[(methoxycarbonyl)amino]-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O6S 详情 详情
(VIII) 27413 methyl (2R)-2-amino-3-sulfanylpropanoate C4H9NO2S 详情 详情
(XII) 35122 (2S,3S)-2-(acetylsulfanyl)-3-methylpentanoic acid C8H14O3S 详情 详情
(XIII) 38523 methyl (3R,6S,9R,9aR)-6-[[(2S,3S)-2-(acetylsulfanyl)-3-methylpentanoyl]amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C19H30N2O5S2 详情 详情
(XXVI) 17380 (2S)hexahydro-2-pyridinecarboxylic acid; (S)-pipecolic acid 3105-95-1 C6H11NO2 详情 详情
(XXVII) 38524 2-(tert-butyl) 1-methyl (2S)-1,2-piperidinedicarboxylate C12H21NO4 详情 详情
(XXVIII) 38525 2-(tert-butyl) 1-methyl (2S)-6-oxo-1,2-piperidinedicarboxylate C12H19NO5 详情 详情
(XXIX) 38526 2-(tert-butyl) 1-methyl (2S,5R)-5-methyl-6-oxo-1,2-piperidinedicarboxylate C13H21NO5 详情 详情
(XXX) 38527 2-(tert-butyl) 1-methyl (2S,5R)-6-hydroxy-5-methyl-1,2-piperidinedicarboxylate C13H23NO5 详情 详情
(XXXII) 38530 methyl (3R,6S,9R,9aR)-6-[(methoxycarbonyl)amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O5S 详情 详情
(XXXIII) 38521 methyl (3R,6S,9R,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情

合成路线3

该中间体在本合成路线中的序号:(XIa)

Treatment of 5-methylpyridine-2-carbonitrile (I) with ethanol and sulfuric acid gave ester (II), which was further hydrolyzed to carboxylic acid (III) using aqueous HCl. Hydrogenation of the pyridine ring of (III) over PtO2 yielded a 3:1 mixture of cis and trans piperidines as the corresponding hydrochloride salts (IVa-b). Liberation of the free base of (IVa-b) by means of Et3N in a suspension in CH2Cl2 allowed the separation of the racemic cis isomer, which was N-acylated with Ac2O to give acetamide (V). Esterification of (V) with isobutylene in the presence of H2SO4 afforded the tert-butyl ester (VI). The electrochemical oxidation of (VI) in MeOH produced the 6-methoxy piperidine (VII). Ring opening of the piperidine (VII) with formation of the thiazolidine ring upon treatment with methyl L-cysteinate (VIII) generated the tert-butoxycarbonylbutyl thiazolidine (IXa-h) as a complex mixture of diastereoisomers. After cleavage of the tert-butyl ester of (IXa-h) with trifluoroacetic acid, cyclization using 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ) gave rise to the thiazoloazepine bicyclic system (Xa-d). Column chromatography of the resulting diastereomeric mixture provided the (6S,9R) and (6S,9S) isomers in a 1:2 ratio. Hydrolysis of this mixture with methanolic HCl yielded the bicyclic amine (XIa-b). Coupling of (XIa-b) with (2S,3S)-2-acetylthio-3-methylpentanoic acid (XII) gave the corresponding mixture of amides, from which the desired isomer (XIII) was isolated by column chromatography. Hydrolysis of methyl ester and thioacetate ester groups of (XIII) using LiOH, followed by S-acetylation with Ac2O in the presence of CoCl2 gave rise to the title compound.

1 Oinuma, H.; Suda, S.; Yoneda, N.; Kotake, M.; Mizuno, M.; Matsuhima, T.; Fukuda, Y.; Saito, M.; Matsuoka, T.; Adachi, H.; Namiki, M.; Sudo, T.; Miyake, K.; Okita, M. (Eisai Co., Ltd.); Substd. thiazolo[3,2-alpha]azepine deriv.. EP 0719779; JP 1996027156; JP 1996059672; JP 1996165293; US 5789403; WO 9602549 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IXa) 38509 methyl (2S,4R)-2-[(1R,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXb) 38510 methyl (2S,4R)-2-[(1R,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXc) 38511 methyl (2R,4R)-2-[(1R,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXd) 38512 methyl (2R,4R)-2-[(1R,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXe) 38513 methyl (2S,4R)-2-[(1S,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXf) 38514 methyl (2S,4R)-2-[(1S,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXg) 38515 methyl (2R,4R)-2-[(1S,4S)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(IXh) 38516 methyl (2R,4R)-2-[(1S,4R)-4-(acetamido)-5-(tert-butoxy)-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O5S 详情 详情
(Xa) 38517 methyl (3R,6S,9R,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(Xb) 38518 methyl (3R,6R,9R,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(Xd) 38520 methyl (3R,6R,9S,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情
(XIa) 38521 methyl (3R,6S,9R,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情
(XIb) 38522 methyl (3R,6S,9S,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情
(I) 38502 5-methyl-2-pyridinecarbonitrile C7H6N2 详情 详情
(II) 38503 ethyl 5-methyl-2-pyridinecarboxylate C9H11NO2 详情 详情
(III) 38504 5-methyl-2-pyridinecarboxylic acid C7H7NO2 详情 详情
(IV) 38505 5-methyl-2-piperidinecarboxylic acid C7H13NO2 详情 详情
(V) 38506 (2S,5S)-1-acetyl-5-methyl-2-piperidinecarboxylic acid C9H15NO3 详情 详情
(VI) 38507 tert-butyl (2S,5S)-1-acetyl-5-methyl-2-piperidinecarboxylate C13H23NO3 详情 详情
(VII) 38508 tert-butyl (2S,5S)-1-acetyl-6-methoxy-5-methyl-2-piperidinecarboxylate C14H25NO4 详情 详情
(VIII) 27413 methyl (2R)-2-amino-3-sulfanylpropanoate C4H9NO2S 详情 详情
(XII) 35122 (2S,3S)-2-(acetylsulfanyl)-3-methylpentanoic acid C8H14O3S 详情 详情
(XIII) 38523 methyl (3R,6S,9R,9aR)-6-[[(2S,3S)-2-(acetylsulfanyl)-3-methylpentanoyl]amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C19H30N2O5S2 详情 详情
(Xc) 38519 methyl (3R,6S,9S,9aR)-6-(acetamido)-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O4S 详情 详情

合成路线4

该中间体在本合成路线中的序号:(XXI)

In a related method, L-pipecolic acid (XIV) was protected as the methyl carbamate, followed by esterification with isobutylene to give (XV). Oxidation of (XV) with NaIO4 in the presence of RuO2 generated the 6-oxopipecolic acid derivative (XVI), which was subsequently methylated to yield (XVII) as the major diastereoisomer. Reduction of (XVII) with DIBAL afforded the cyclic aminal (XVIII). Condensation of (XVIII) with methyl L-cysteinate (VIII) gave thiazolidine (XIXa-b). After tert-butyl ester cleavage in (XIXa-b) with trifluoroacetic acid, cyclization by means of EEDQ produced the bicyclic system (XX). Deprotection of the methyl carbamate group of (XX) was carried out using methanesulfonic acid in the presence of dimethyl sulfide to afford amine (XXI). Coupling of (XXI) with (2S,3S)-2-acetylthio-3-methylpentanoic acid (XII) gave the corresponding mixture of amides, from which the desired isomer (XIII) was isolated by column chromatography. Hydrolysis of methyl ester and thioacetate ester groups of (XIII) using LiOH, followed by S-acetylation with Ac2O in the presence of CoCl2 gave rise to the title compound.

1 Oinuma, H.; Kotake, M.; Suda, S.; et al.; Discovery of a novel and orally active dual inhibitor of NEP and ACE: Synthesis and pharmacology. 217th ACS Natl Meet (March 21 1999, Anaheim) 2000, Abst MEDI 111.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XIXa) 38528 methyl (2R,4R)-2-[(1R,4S)-5-(tert-butoxy)-4-[(methoxycarbonyl)amino]-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O6S 详情 详情
(XIXb) 38529 methyl (2S,4R)-2-[(1R,4S)-5-(tert-butoxy)-4-[(methoxycarbonyl)amino]-1-methyl-5-oxopentyl]-1,3-thiazolidine-4-carboxylate C17H30N2O6S 详情 详情
(VIII) 27413 methyl (2R)-2-amino-3-sulfanylpropanoate C4H9NO2S 详情 详情
(XII) 35122 (2S,3S)-2-(acetylsulfanyl)-3-methylpentanoic acid C8H14O3S 详情 详情
(XIII) 38523 methyl (3R,6S,9R,9aR)-6-[[(2S,3S)-2-(acetylsulfanyl)-3-methylpentanoyl]amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C19H30N2O5S2 详情 详情
(XIV) 17380 (2S)hexahydro-2-pyridinecarboxylic acid; (S)-pipecolic acid 3105-95-1 C6H11NO2 详情 详情
(XV) 38524 2-(tert-butyl) 1-methyl (2S)-1,2-piperidinedicarboxylate C12H21NO4 详情 详情
(XVI) 38525 2-(tert-butyl) 1-methyl (2S)-6-oxo-1,2-piperidinedicarboxylate C12H19NO5 详情 详情
(XVII) 38526 2-(tert-butyl) 1-methyl (2S,5R)-5-methyl-6-oxo-1,2-piperidinedicarboxylate C13H21NO5 详情 详情
(XVIII) 38527 2-(tert-butyl) 1-methyl (2S,5R)-6-hydroxy-5-methyl-1,2-piperidinedicarboxylate C13H23NO5 详情 详情
(XX) 38530 methyl (3R,6S,9R,9aR)-6-[(methoxycarbonyl)amino]-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C13H20N2O5S 详情 详情
(XXI) 38521 methyl (3R,6S,9R,9aR)-6-amino-9-methyl-5-oxooctahydro[1,3]thiazolo[3,2-a]azepine-3-carboxylate C11H18N2O3S 详情 详情
Extended Information