title: Synthesis and anti-Helicobacter pylori activity of 5-(nitroaryl)-1,3,4-thiadiazoles with certain sulfur containing alkyl side chain.
abstract: A series of 5-(nitroaryl)-1,3,4-thiadiazoles bearing certain sulfur containing alkyl side chain similar to pendent residue in tinidazole molecule were synthesized and evaluated against Helicobacter pylori using disk diffusion method. The synthesized compounds were also evaluated for their antibacterial, antifungal and cytotoxic effects. Study of the structure-activity relationships of this series of compounds indicated that both the structure of the nitroaryl unit and the pendent group on 2-position of 1,3,4-thiadiazole ring dramatically impact the anti-H. pylori activity. While compound 7a containing 2-[2-(ethylsulfonyl)ethylthio]-side chain from nitrothiophene series was the most potent compound tested against clinical isolates of H. pylori, however, nitroimidazoles 6c and 7c were found to be more promising compounds because of their respectable anti-H. pylori activity besides less cytotoxic effects.
authors.affiliation: Department of Medicinal Chemistry, Faculty of Pharmacy & Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 14174, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Foroumadi
authors.forename: Ardeshir
authors.initials: A
authors.lastname: Rineh
authors.forename: Saeed
authors.initials: S
authors.lastname: Emami
authors.forename: Farideh
authors.initials: F
authors.lastname: Siavoshi
authors.forename: Sadegh
authors.initials: S
authors.lastname: Massarrat
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Safari
authors.forename: Saeed
authors.initials: S
authors.lastname: Rajabalian
authors.forename: Mehraban
authors.initials: M
authors.lastname: Falahati
authors.forename: Ensieh
authors.initials: E
authors.lastname: Lotfali
authors.forename: Abbas
authors.initials: A
authors.lastname: Shafiee
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D016480:Helicobacter pylori / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D013329:Structure-Activity Relationship; D013830:Thiadiazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D013830:Thiadiazoles