title: Synthesis and biological activity of platinum group metal complexes of o-vanillin thiosemicarbazones.
abstract: o-Vanillin-(4-methylthiosemicarbazone), o-Vanillin-(4-phenylthiosemicarbazone) and some of their metal complexes of the platinum group have been synthesized, characterized by chemical and spectral methods and studied for their antibacterial, antifungal and amoebicidal activity in vitro. The platinum group metal chelates exibited significant activity against a wide spectrum of microorganisms at different concentrations. The Pt(II) and Ru(III) chelates derived from o-vanillin-(4-phenylthiosemicarbazone) seem to be the most efficient inhibitors. Evaluation of the antimalarial activity of the compounds in mice infected with Plasmodium berghei indicated that cures were attainable at dose levels of 40-160 mg/kg but with toxic death prevalence at higher dose levels.
authors.affiliation: Department of Chemistry-University of Calabar, Nigeria.
authors.forename: O E
authors.initials: OE
authors.lastname: Offiong
authors.forename: C
authors.initials: C
authors.lastname: Etok
authors.forename: S
authors.initials: S
authors.lastname: Martelli
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000494:pharmacology; D000962:Antimalarials / Q000138:chemical synthesis / Q000494:pharmacology; D000981:Antiprotozoal Agents / Q000138:chemical synthesis / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D004748:Entamoeba histolytica / Q000187:drug effects; D005260:Female; D005658:Fungi / Q000187:drug effects; D007928:Lethal Dose 50; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008288:Malaria / Q000188:drug therapy / Q000469:parasitology; D008297:Male; D051379:Mice; D008826:Microbial Sensitivity Tests; D009944:Organoplatinum Compounds / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013882:Thiosemicarbazones / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D000962:Antimalarials; D000981:Antiprotozoal Agents; D008024:Ligands; D009944:Organoplatinum Compounds; D013882:Thiosemicarbazones