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【结 构 式】

【分子编号】15232

【品名】tert-butyl N-[(1S)-1-[([(1S)-1-[(tetrahydro-1H-pyrrol-3-ylamino)carbonyl]butyl]amino)carbonyl]butyl]carbamate

【CA登记号】

【 分 子 式 】C19H36N4O4

【 分 子 量 】384.5194

【元素组成】C 59.35% H 9.44% N 14.57% O 16.64%

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:(V)

Treatment of ethyl 2,6-dichloro-5-fluoronicotinylacetate (I) with ethyl orthoformate in refluxing acetic anhydride and then with 2,4-difluoroaniline in methylene chloride at room temperature gives the enaminoketo ester derivative (II). Cyclization of (II) with sodium hydride in THF gives ethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate (III). Hydrolysis of (III) with hydrochloric acid yields 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (IV). Condensation of (IV) with 3-tert-butoxycarbonyl-L-norvalyl-L-norvalylaminopyrrolidine (V) in pyridine yields 7-(3-tert-butoxycarbonyl-L-norvalyl-L-norvalylaminopyrrolidin-1-yl)- 1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (VI). Hydrolysis of (VI) in trifluoroacetic acid gives A-70826.

1 Chu, D.T.W.; A-70826. Drugs Fut 1992, 17, 3, 179.
2 Chu, D.T.W.; Pernet, A.G.; Plattner, J.J.; Hallas, R.; Shipkowitz, N.; Marsh, K.C.; Synthesis and biological properties of A-70826: A prodrug of tosufloxacin. 31st Intersci Conf Antimicrob Agents Chemother (Sept 29-Oct 2, Chicago) 1991, Abst 1440.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
19462 2,4-difluoroaniline; 2,4-difluorophenylamine;2,4-Difluoro-benzenamine;1-Amino-2,4-difluorobenzene 367-25-9 C6H5F2N 详情 详情
(I) 15228 ethyl 3-(2,6-dichloro-5-fluoro-3-pyridinyl)-3-oxopropanoate C10H8Cl2FNO3 详情 详情
(II) 15229 ethyl (Z)-2-[(2,6-dichloro-5-fluoro-3-pyridinyl)carbonyl]-3-(2,4-difluoroanilino)-2-propenoate C17H11Cl2F3N2O3 详情 详情
(III) 15230 ethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylate C17H10ClF3N2O3 详情 详情
(IV) 15231 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylic acid C15H6ClF3N2O3 详情 详情
(V) 15232 tert-butyl N-[(1S)-1-[([(1S)-1-[(tetrahydro-1H-pyrrol-3-ylamino)carbonyl]butyl]amino)carbonyl]butyl]carbamate C19H36N4O4 详情 详情
(VI) 15233 7-(3-[[(2S)-2-([(2S)-2-[(tert-butoxycarbonyl)amino]pentanoyl]amino)pentanoyl]amino]-1-pyrrolidinyl)-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylic acid C34H41F3N6O7 详情 详情
Extended Information