127294-64-8Relevant academic research and scientific papers
The Synthesis, Structure-Activity, and Structure-Side Effect Relationships of a Series of 8-Alkoxy- and 5-Amino-8-alkoxyquinolone Antibacterial Agents
Sanchez, Joseph P.,Gogliotti, Rocco D.,Domagala, John M.,Gracheck, Stephen J.,Huband, Michael D.,et al.
, p. 4478 - 4487 (2007/10/03)
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.
Novel quinolonecarboxylic acid derivatives
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, (2008/06/13)
Novel compounds of the present invention are represented by the general formula (1) STR1 wherein R1 is hydrogen atom or amino, R2 is fluorine atom or methoxy, R3 is hydrogen atom or a lower alkyl having 1 to 3 carbon atoms, and n is 0 or 1. The compounds of the general formula (1) exhibit higher antibacterial activity with fewer side-effects than known quinolone antibiotics such as ofloxacin and norfloxacin. Further, the compounds having the general formula (1) have reduced phototoxicity which normally accompanies 6,8-defluoroquinoline antibiotics.
