申请人:Warner-Lambert Company
公开号:US04578473A1
公开(公告)日:1986-03-25
An improved process for the preparation of 7-substituted amino-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids is described where an alkyl ester of a 6,7,8-trifluoro precursor is converted to a trialkylsilyl ester which fluorine at C.sub.7 is directly displaced to the desired product.
本文描述了一种改进的制备7-取代氨基-1-环丙基-6,8-二氟-1,4-二氢-4-氧基-3-喹啉羧酸的过程,其中将6,7,8-三氟前体的烷基酯转化为三烷基硅酯,C.sub.7处的氟原子直接被置换为所需的产物。