Novel naphthyridine-, quinoline- and benzoxazine-carboxylic acids as antibacterial agents are described as well as methods for their manufacture, formulation, and use in treating bacterial infections including the description of certain novel intermediates used in the manufacture of the antibacterial agents.
Improved process for production of quinoline-3-carboxylic acid antibacterial agents
申请人:WARNER-LAMBERT COMPANY
公开号:EP0200307A1
公开(公告)日:1986-11-05
An improved process for the preparation of 7- substituted amino-1-cyclopropyl-6, 8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids of formula
and pharmaceutically acceptable acid addition or base salts thereof, wherein A is a substituted amino group, X is hydrogen or fluorine, and R2 is alkyl of one to three carbon atoms or cycloalkyl of three to six carbon atoms, is described. An alkyl ester precursor is converted via an anhydrous preparation to an alkali metal salt which in a separate step or in situ is displaced and hydrolyzed to the desired product.
Process for quinoline-3-carboxylic acid antibacterial agents
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.