title: Conformationally constrained analogs of N-substituted piperazinylquinolones: synthesis and antibacterial activity of N-(2,3-dihydro-4-hydroxyimino-4H-1-benzopyran-3-yl)-piperazinylquinolones.
abstract: A series of novel quinolone agents bearing a particular bulky and conformationally constrained bicyclic substituent (2,3-dihydro-4-hydroxyimino-4H-1-benzopyran-3-yl- moiety) on the piperazine ring of 7-piperazinyl quinolones (norfloxacin, enoxacin, ciprofloxacin, and levofloxacin) were synthesized and evaluated against a panel of Gram-positive and Gram-negative bacteria. Among these derivatives, ciprofloxacin counterpart 9c, highly inhibited the tested Gram-positive bacteria, superior to that of the reference drugs, and displayed antibacterial activity at non-cytotoxic concentrations.
authors: Department of Medicinal Chemistry, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran. sd_emami@yahoo.com
authors: Saeed
authors: S
authors: Emami
authors: Alireza
authors: A
authors: Foroumadi
authors: Nasrin
authors: N
authors: Samadi
authors: Mohammad A
authors: MA
authors: Faramarzi
authors: Saeed
authors: S
authors: Rajabalian
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology* / Q000633:toxicity; D016923:Cell Death / Q000187:drug effects; D015195:Drug Design; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008826:Microbial Sensitivity Tests; D008968:Molecular Conformation; D015394:Molecular Structure; D041681:NIH 3T3 Cells; D015363:Quinolones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology* / Q000633:toxicity; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D015363:Quinolones