title: 2-(4-Pyridyl)-delta 2-1,3,4-oxadiazolines from isonicotinoylhydrazones and diazomethane as potential antimycobacterial and anti-HIV agents. V.
abstract: The 5-aryl-4-methyl-2-(4-pyridyl)-delta 2-1,3,4-oxadiazolines 3, previously synthesized along with isomer 4-aryl-1-methoxy-1-(4-pyridyl)-2,3-diaza-1,3-butadienes 2 from benzaldehyde isonicotinoylhydrazones and diazomethane, were tested for in vitro activity against both M. tuberculosis and some atypical mycobacterial strains as well as against human immunodeficiency virus (HIV-1). Some halophenyl derivatives, 3e, 3g, 3i, 3j, were found to display MIC ranges from 1 to 10 (micrograms/ml against H 37 Rv and a clinical isolate tubercular strain, whereas against M. avium (MAC) the MICs were higher than 20 micrograms/ml. When the combinations of oxadiazolines with ethambutol, acting as inhibitor of cell wall synthesis, were assayed on MAC strain a synergistic effect was demonstrated for 3g and 3h trifluoromethyl derivatives. The antimycobacterial profiles of 2 and 3 analogues are compared and discussed. As shown by compounds 2, no substantial anti-HIV in vitro activity was found in selected delta 2-oxadiazolines; a moderate cytotoxicity, however, appears to be a common property.
authors.affiliation: Dipartimenti Farmaco-chimico, Università di Messina, Italy.
authors.forename: M G
authors.initials: MG
authors.lastname: Vigorita
authors.forename: R
authors.initials: R
authors.lastname: Ottanà
authors.forename: C
authors.initials: C
authors.lastname: Zappalà
authors.forename: R
authors.initials: R
authors.lastname: Maccari
authors.forename: F C
authors.initials: FC
authors.lastname: Pizzimenti
authors.forename: G
authors.initials: G
authors.lastname: Gabbrielli
mesh_terms: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002473:Cell Wall / Q000187:drug effects / Q000378:metabolism; D015497:HIV-1 / Q000187:drug effects*; D006801:Humans; D009161:Mycobacterium / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000998:Antiviral Agents