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【结 构 式】

【分子编号】36296

【品名】tert-butyl (3S,4S)-4-(fluoromethyl)-2-oxo-1-[(1R)-1-phenylethyl]pyrrolidinylcarbamate

【CA登记号】

【 分 子 式 】C18H25FN2O3

【 分 子 量 】336.4065832

【元素组成】C 64.27% H 7.49% F 5.65% N 8.33% O 14.27%

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:(X)

The condensation of itaconic acid (I) with (R)-1-phenylethylamine (II) produced a mixture of diastereomeric pyrrolidinones (III). The desired isomer (IV) was then isolated after conversion to the corresponding methyl ester. Introduction of the fluorine atom to give (VI) was achieved by either treatment with diethylaminosulfur trifluoride (DAST) or via conversion to the corresponding mesylate and further displacement by tetrabutylammonium fluoride. Hydroxylation of the lithium enolate of (VI) by means of O2 and (EtO)3P afforded the trans-3-hydroxy-4-(fluoromethyl)pyrrolidinone (VII). This was converted to mesylate (VIII) and subsequently displaced by NaN3 to provide the cis azide (IX). Hydrogenation of the azido group of (IX) over Pd/C in the presence of di-tert-butyl dicarbonate produced the Boc-protected amine (X). The pyrrolidinone ring was then reduced to pyrrolidine (XI) with borane in THF, and further hydrogenation over Pd/C at 50 C removed the alpha-methylbenzyl group, yielding (XII). Optionally, acid deprotection of the Boc group of (XII) provided intermediate (XIII).

1 Takahaski, H.; et al.; DC-756: A new methoxyquinolone: Synthesis and in vitro activity of 7-(3-amino-4-substituted-pyrrolidin-1-yl) derivatives. 38th Intersci Conf Antimicrob Agents Chemother (Sept 24 1998, San Diego) 1998, Abst F-73.
2 Takeda, T.; Kimura, K.; Ohki, H.; Takahashi, H.; Miyauchi, R.; Takemura, M. (Daiichi Pharmaceutical Co., Ltd.); Cis-substd. fluoromethylpyrrolidine derivs.. EP 0995744; WO 9858923 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IIIa) 36288 (3R)-5-oxo-1-[(1R)-1-phenylethyl]-3-pyrrolidinecarboxylic acid C13H15NO3 详情 详情
(IIIb) 36289 (3S)-5-oxo-1-[(1R)-1-phenylethyl]-3-pyrrolidinecarboxylic acid C13H15NO3 详情 详情
(I) 27493 2-methylenesuccinic acid 97-65-4 C5H6O4 详情 详情
(II) 10039 (1R)-1-Phenylethylamine; (1R)-1-Phenyl-1-ethanamine.; L-alpha-Phenylethylamine 3886-69-9 C8H11N 详情 详情
(IV) 36290 methyl (3R)-5-oxo-1-[(1R)-1-phenylethyl]-3-pyrrolidinecarboxylate C14H17NO3 详情 详情
(V) 36291 (4R)-4-(hydroxymethyl)-1-[(1R)-1-phenylethyl]-2-pyrrolidinone C13H17NO2 详情 详情
(VI) 36292 (4R)-4-(fluoromethyl)-1-[(1R)-1-phenylethyl]-2-pyrrolidinone C13H16FNO 详情 详情
(VII) 36293 (3R,4S)-4-(fluoromethyl)-3-hydroxy-1-[(1R)-1-phenylethyl]-2-pyrrolidinone C13H16FNO2 详情 详情
(VIII) 36294 (3R,4S)-4-(fluoromethyl)-2-oxo-1-[(1R)-1-phenylethyl]pyrrolidinyl methanesulfonate C14H18FNO4S 详情 详情
(IX) 36295 (3S,4S)-3-azido-4-(fluoromethyl)-1-[(1R)-1-phenylethyl]-2-pyrrolidinone C13H15FN4O 详情 详情
(X) 36296 tert-butyl (3S,4S)-4-(fluoromethyl)-2-oxo-1-[(1R)-1-phenylethyl]pyrrolidinylcarbamate C18H25FN2O3 详情 详情
(XI) 36297 tert-butyl (3S,4S)-4-(fluoromethyl)-1-[(1R)-1-phenylethyl]pyrrolidinylcarbamate C18H27FN2O2 详情 详情
(XII) 36298 tert-butyl (3S,4S)-4-(fluoromethyl)pyrrolidinylcarbamate C10H19FN2O2 详情 详情
(XIII) 36299 (3S,4S)-4-(fluoromethyl)-3-pyrrolidinamine; (3S,4S)-4-(fluoromethyl)pyrrolidinylamine C5H11FN2 详情 详情
Extended Information