title: Synthesis and structure-activity relationships of new antimicrobial active multisubstituted benzazole derivatives.
abstract: A series of multisubstituted benzoxazoles, benzimidazoles, and benzothiazoles (5-7) as non-nucleoside fused isosteric heterocyclic compounds was synthesized and tested for their antibacterial activities against various Gram-positive and Gram-negative bacteria and antifungal activity against the fungus Candida albicans. Microbiological results indicated that the synthesized compounds possessed a broad spectrum of activity against the tested microorganisms at MIC values between 100 and 3.12 microg/ml. Structure-activity relationships (SAR) studies revealed that benzothiazole ring system enhanced the antimicrobial activity against Staphylococcus aureus. In these sets of non-nucleoside fused heterocyclic compounds electron withdrawing groups at position 5 of the benzazoles increased the activity against C. albicans.
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, Tandogan, 06100 Ankara, Turkey.
authors.forename: Ilkay
authors.initials: I
authors.lastname: Yildiz-Oren
authors.forename: Ismail
authors.initials: I
authors.lastname: Yalcin
authors.forename: Esin
authors.initials: E
authors.lastname: Aki-Sener
authors.forename: Nejat
authors.initials: N
authors.lastname: Ucarturk
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D001562:Benzimidazoles / Q000138:chemical synthesis* / Q000494:pharmacology*; D001583:Benzoxazoles / Q000138:chemical synthesis* / Q000494:pharmacology*; D002176:Candida albicans / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D001562:Benzimidazoles; D001583:Benzoxazoles