申请人:Bristol-Myers Squibb Company
公开号:US05594129A1
公开(公告)日:1997-01-14
The present invention provides an anhydrous acylation process for the preparation of antibiotic, cefepime dihydrochloride hydrate which is substantially free of the anti-isomer and the .DELTA..sup.2 isomer comprising the N-acylation of a silylated derivative of 7-amino-3-[(1-methyl-1-pyrrolidinio)-methyl]ceph-3-em-4-carboxylate with the syn-isomer of 2-(2-aminothiazol-4-yl)-2-methoxyimino acetyl chloride hydrochloride.
本发明提供了一种无水酰化过程,用于制备抗生素头孢吡肟双盐酸盐水合物,该水合物基本上不含反异构体和.DELTA..sup.2 异构体,包括将7-氨基-3-[(1-甲基-1-吡咯烷基)-甲基]头孢-3-酯的硅基衍生物与2-(2-氨基噻唑-4-基)-2-甲氧基亚胺基乙酰氯盐酸盐的同构体进行N-酰化。