Journal of Medicinal Chemistry p. 4478 - 4487 (1995)
Update date:2022-07-29
Topics:
Sanchez, Joseph P.
Gogliotti, Rocco D.
Domagala, John M.
Gracheck, Stephen J.
Huband, Michael D.
et al.
A series of 1-cyclopropyl-6-fluoro-8-alkoxy (8-methoxy and 8-ethoxy)-quinoline-3-carboxylic acids and 1-cyclopropyl-5-amino-6-fluoro-8-alkoxyquinoline-3-carboxylic acids has been prepared and evaluated for antibacterial activity.In addition, they were also compared to quinolones with classic substitution at C8 (H, F, Cl) and the naphthyridine nucleus in a phototoxicity and mammalian cell cytotoxiciry assay.The series of 8-methoxyquinolones had antibacterial activity against Gram-positive, Gram-negative, and anaerobic bacteria equivalent to that most active 8-substituted compounds (8-F and 8-Cl).There was also a concomitant reduction in several of the potential side effects (i.e., phototoxicity and clonogenicity) compared to the most active quinolones with classic substitution at C-8.The 8-ethoxy derivatives had an even better safety profile but were significantly less active (2-3 dilutions) in the antibacterial assay.
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