title: Synthesis and antibacterial activity of N-[2-[5-(methylthio)thiophen-2-yl]-2-oxoethyl] and N-[2-[5-(methylthio)thiophen-2-yl]-2-(oxyimino)ethyl]piperazinylquinolone derivatives.
abstract: A number of N-substituted piperazinylquinolone derivatives were synthesized and evaluated for antibacterial activity against Gram-positive and Gram-negative bacteria. Preliminary results indicated that most compounds tested in this study demonstrated comparable or better activity against Staphylococcus aureus and Staphylococcus epidermidis than their parent piperazinylquinolones as reference drugs. Among these derivatives, ciprofloxacin derivative 5a, containing N-[2-[5-(methylthio)thiophen-2-yl]-2-oxoethyl] residue, showed significant improvement of potency against staphylococci, maintaining Gram-negative coverage.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 14174, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Foroumadi
authors.forename: Mehdi
authors.initials: M
authors.lastname: Oboudiat
authors.forename: Saeed
authors.initials: S
authors.lastname: Emami
authors.forename: Alireza
authors.initials: A
authors.lastname: Karimollah
authors.forename: Lotfollah
authors.initials: L
authors.lastname: Saghaee
authors.forename: Mohammad Hassan
authors.initials: MH
authors.lastname: Moshafi
authors.forename: Abbas
authors.initials: A
authors.lastname: Shafiee
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D002939:Ciprofloxacin / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010879:Piperazines / Q000138:chemical synthesis* / Q000494:pharmacology*; D015363:Quinolones / Q000138:chemical synthesis* / Q000494:pharmacology*; D013210:Staphylococcus / Q000187:drug effects; D013876:Thiophenes / Q000138:chemical synthesis* / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D010879:Piperazines; D015363:Quinolones; D013876:Thiophenes; D002939:Ciprofloxacin