title: Synthesis and antibacterial activity of N-(5-benzylthio-1,3,4-thiadiazol-2-yl) and N-(5-benzylsulfonyl-1,3,4-thiadiazol-2-yl)piperazinyl quinolone derivatives.
abstract: A series of N-(5-benzylthio-1,3,4-thiadiazol-2-yl) and N-(5-benzylsulfonyl-1,3,4-thiadiazol-2-yl) derivatives of piperazinyl quinolones was synthesized and evaluated for antibacterial activity against Gram-positive and Gram-negative microorganisms. Some of these derivatives exhibit high activity against Gram-positive bacteria; Staphylococcus aureus and Staphylococcus epidermidis, comparable or more potent than their parent N-piperazinyl quinolones norfloxacin and ciprofloxacin as reference drugs. The SAR of this series indicates that both the structure of the benzyl unit and the S or SO(2) linker dramatically impact antibacterial activity.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran. aforoumadi@yahoo.com
authors.forename: Alireza
authors.initials: A
authors.lastname: Foroumadi
authors.forename: Saeed
authors.initials: S
authors.lastname: Emami
authors.forename: Abdolreza
authors.initials: A
authors.lastname: Hassanzadeh
authors.forename: Majid
authors.initials: M
authors.lastname: Rajaee
authors.forename: Kazem
authors.initials: K
authors.lastname: Sokhanvar
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* / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D015363:Quinolones / Q000138:chemical synthesis* / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects; D013212:Staphylococcus epidermidis / Q000187:drug effects; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D015363:Quinolones