申请人:WARNER-LAMBERT COMPANY
公开号:EP0236673A2
公开(公告)日:1987-09-16
An improved process for the preparation of 7-substituted amino-l-alkyl- or cyclopropyl-6,8-difluoro-l,4-dihydro-4-oxo-3-quinolinecarboxylic acids is described where tetrafluorobenzoyl chloride is converted in three operations via l-alkyl or l-cycloalkyl-l,4-dihydro-6,7,8-trifluoro-4-oxo-quinoline-3-carbonitrile which in a separate step or in situ is displaced and hydrolyzed to the desired product.
本发明描述了一种制备 7-取代氨基-l-烷基-或环丙基-6,8-二氟-l,4-二氢-4-氧代-3-喹啉羧酸的改进工艺,其中四氟苯甲酰氯通过 l-烷基或 l-环烷基-l,4-二氢-6,7,8-三氟-4-氧代-3-喹啉腈在三个步骤中进行转化,而后在单独步骤中或原位置换并水解为所需产物。