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【结 构 式】

【分子编号】65436

【品名】2-Benzyl 1-ethyl (1S,3aR,6aS)-4-hydroxyhexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylate

【CA登记号】 

【 分 子 式 】C18H23NO5

【 分 子 量 】333.38436

【元素组成】C 64.85% H 6.95% N 4.2% O 24%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XXII)

The bicyclic amino acid building blocks (VI) and (XIV) can be obtained as follows. Reduction of N-Cbz-4-oxoperhydrocyclopenta[c]pyrrole-1-carboxylate (XXI) with NaBH4 in EtOH affords the hydroxy derivative (XXII), which is converted to xanthate (XXIII) by treatment with carbon disulfide, iodomethane and NaH in THF. Desulfurization of (XXIII) by means of tributyltin hydride and AIBN in hot toluene affords the N-protected bicyclic amino ester (XXIV), which is finally submitted to hydrogenolysis over Pearlman’s catalyst to furnish the intermediate (VI) (1). Alternatively, protection of 3-azabicyclo[3.3.0]nonane (XXV) as the N-Boc derivative (XXVI) followed by carboxylation with sec-butyllithium and CO2 gas in the presence of 3,7-dipropyl-3,7-diazabicyclo[3.3.1]nonane leads to the N-protected amino acid (XXVII). After resolution of (XXVII) with either 1,2,3,4-tetrahydro-1(S)-naphthylamine or with (R)-α-methylbenzylamine, the desired 1(S)-amino acid is esterified to (XXVIII) utilizing Boc2O and DMAP in t-BuOH/MTBE. Then, selective Boc group cleavage by means of methanesulfonic acid in THF provides the target intermediate (XIV) (3). Scheme 3.

1 Babine, R.E., Glass, J.I., Lamar, J.E. et al. (Eli Lilly and Company). Peptidomimetic protease inhibitors. JP 2004517047, US 2005197299, WO 2002018369.
3 Tanoury, G.J., Chen, M., Cochran, J.E. (Vertex Pharmaceuticals, Inc.). Processes and intermediates. WO 2007022459.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 65421 (1S,3aR,6aS)-Octahydrocyclopenta[c]pyrrole-1-carboxylic acid ethyl ester; ethyl cis-perhydrocyclopenta[c]pyrrole-1-carboxylate 402958-25-2 C10H17NO2 详情 详情
(XIV) 65428 (1S,3aR,6aS)-Octahydrocyclopenta[c]pyrrole-1-carboxylic acid tert-butyl ester 714194-68-0 C12H21NO2 详情 详情
(XXI) 65435 2-Benzyl 1-ethyl (1S,3aR,6aS)-4-oxohexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylate 402958-21-8 C18H21NO5 详情 详情
(XXII) 65436 2-Benzyl 1-ethyl (1S,3aR,6aS)-4-hydroxyhexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylate   C18H23NO5 详情 详情
(XXIII) 65437      C20H25NO5S2 详情 详情
(XXIV) 65438     C18H23NO4 详情 详情
(XXV) 65439 cis-7-Azabicyclo[3.3.0]octane; (3aR,6aS)-rel-Octahydrocyclopenta[c]pyrrole 1468-87-7 C7H13N 详情 详情
(XXVI) 65440 (3aR,6aS)-rel-Hexahydrocyclopenta[c]pyrrole-2(1H)-carboxylic acid tert-butyl ester 926276-08-6 C12H21NO2 详情 详情
(XXVII) 65441 (1S,3aR,6aS)-Hexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylic acid 2-(tert-butyl) ester 597569-42-1 C13H21NO4 详情 详情
(XXVIII) 65442 (1S,3aR,6aS)-Hexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylic acid 1,2-di(tert-butyl) ester   C17H29NO4 详情 详情
Extended Information