Pyridonecarboxylic Acids as Antibacterial Agents. VI. Synthesis and Structure-Activity Relationship of 7-(Alkyl, Cycloalkyl, and Vinyl)-1-cyclopropyl-6-fluoro-4-quinolone-3-carboxylic Acids.
This invention provides, among other things, novel compounds useful for treating bacterial infections, pharmaceutical compositions containing such compounds, as well as combinations of these compounds with at least one additional therapeutically effective agent.
Pyridonecarboxylic Acids as Antibacterial Agents. VI. Synthesis and Structure-Activity Relationship of 7-(Alkyl, Cycloalkyl, and Vinyl)-1-cyclopropyl-6-fluoro-4-quinolone-3-carboxylic Acids.
The title compounds (1a-i) have been synthesized starting with ethyl 1-cyclopropyl-6, 7-difluoro-4-quinolone-3-carboxylate (2). The 7-cyclopropyl and 7-vinyl derivatives (1e and 1i) exhibited potent in vitro antibacterial activities against both gram-positive and gram-negative bacteria, being equipotent with ciprofloxacin (CPFX) except for the activity against Pseudomonas aeruginosa. The two compounds were significantly less toxic than CPFX in terms of convulsion-induction as determined by intracerebral administration to mice, but showed lower urinary recoveries on intravenous administration.