WEMPLE, JAMES N.;ZELLER, JAMES R.;DOMAGALA, JOHN M.
作者:WEMPLE, JAMES N.、ZELLER, JAMES R.、DOMAGALA, JOHN M.
DOI:——
日期:——
US4772706A
申请人:——
公开号:US4772706A
公开(公告)日:1988-09-20
Process for quinoline-3-carboxylic acid antibacterial agents
申请人:Warner-Lambert Company
公开号:US04772706A1
公开(公告)日:1988-09-20
An improved process for the preparation of 7-substituted amino-1-alkyl- or cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids is described where tetrafluorobenzoyl chloride is converted in three operations via 1-alkyl or 1-cycloalkyl-1,4-dihydro-6,7,8-trifluoro-4-oxoquinoline-3-carbonitrile which in a separate step or in situ is displaced and hydrolyzed to the desired product.