Preparation and Anti-Tumour Activity of Some Arylbismuth(III) Oxine Complexes

New arylbismuth(lll) oxinates, PhBi(MeOx)2, (p-MeC6H4)Bi(Ox)2, (p-MeC6H4)Bi(MeOx)2, (p-ClC6H4)Bi(Ox)2, and (p-ClC6H4)Bi(MeOx)2 (Ox− = quinolin-8-olate and MeOx−=2-methylquinolin-8-olate) have been prepared by reaction of the appropriate diarylbismuth chlorides with Na(Ox) or Na(MeOx) in the presence of 15-crown-5. An X-ray crystallographic study has shown PhBi(MeOx)2 to be a five coordinate monomer with distorted square pyramidal stereochemistry. Chelating MeOx ligands have a cisoid arrangement in the square plane and the phenyl group is apical. The lattice is stabilised by significant π-π interactions between centrosymmetric molecules. A range of these complexes has been shown to have high in vitro biological activity (comparable with or better than cisplatin) against L1210 leukaemia, the corresponding cisplatin resistant line, and a human ovarian cell line, SKOV-3. However, initial in vivo testing against a solid mouse plasmacytoma (PC6) and P388 leukaemia has not revealed significant activity

Preparation and anti-tumour activity of some arylbismuth(III) oxine complexes

New arylbismuth(lll) oxinates, PhBi(MeOx)₂, (p-MeC₆H₄)Bi(Ox)₂, (p-MeC₆H₄)Bi(MeOx)₂, (p-ClC₆H4)Bi(Ox)₂, and (p-ClC₆H₄)Bi(MeOx)₂ (Ox− = quinolin-8-olate and MeOx−=2-methylquinolin-8-olate) have been prepared by reaction of the appropriate diarylbismuth chlorides with Na(Ox) or Na(MeOx) in the presence of 15-crown-5. An X-ray crystallographic study has shown PhBi(MeOx)₂ to be a five coordinate monomer with distorted square pyramidal stereochemistry. Chelating MeOx ligands have a cisoid arrangement in the square plane and the phenyl group is apical. The lattice is stabilised by significant π-π interactions between centrosymmetric molecules. A range of these complexes has been shown to have high in vitro biological activity (comparable with or better than cisplatin) against L1210 leukaemia, the corresponding cisplatin resistant line, and a human ovarian cell line, SKOV-3. However, initial in vivo testing against a solid mouse plasmacytoma (PC6) and P388 leukaemia has not revealed significant activity.Katharine A. Smith, Glen B. Deacon, W. Roy Jackson, Edward R. T. Tiekink, Silvina Rainone, and Lorraine K. Webste

Crystal structure of isopropyl 3-isopropyloxy-5-oxophenyl-d2-1,2,4-triazoline-1-carboxylate, C15H19N3O4

Zeitschrift fur Kristallographie - New Crystal Structures217191-9

Nanogoldpharmaceutics: (i) The use of colloidal gold to treat experimentally-induced arthritis in rat models; (ii) Characterization of the gold in Swarna bhasma, a microparticulate used in traditional Indian medicine

Nanosized gold particles (27 +/- 3 nm) have been proven to be effective in ameliorating the symptoms of mycobacterial-, collagen- and pristane-induced arthritis in rat models. This contrasts with the drug sodium aurothiomalate that was only effective against mycobacterial-induced arthritis but not to the same extent as Au0. Gold in the traditional Indian Ayurvedic medicine, Swarna bhasma (gold ash), has been characterized as globular particles of gold with an average size of 56-57 nm

electronic reprint Structure Reports Online 1-(4-Methylbenzyl)-2-(4-methylphenyl)-1H -benzimidazole Structure Reports Online

Inorganic compounds Metal-organic compounds Organic compounds Acta Crystallographica Section E: Structure Reports Online is the IUCr's highly popular open-access structural journal. It provides a simple and easily accessible publication mechanism for the growing number of inorganic, metal-organic and organic crystal structure determinations. The electronic submission, validation, refereeing and publication facilities of the journal ensure very rapid and high-quality publication, whilst key indicators and validation reports provide measures of structural reliability. The journal publishes over 4000 structures per year. The average publication time is less than one month

Organostannanes derived from (-)-menthol: controlling stereochemistry during the preparation of (1R,2S,5R)-menthyldiphenyltin hydride and bis((1R,2S,5R)menthyl)phenyltin hydride

Dakternieks, Dainis; Dunn, Kerri; Henry, David J.; Schiesser, Carl H.; Tiekink, Edward R. T

Electrochemical and yeast-catalysed ring-opening of isoxazoles in the synthesis of analogues of the herbicide Grasp(R)

Isoxazoles substituted with an electron-withdrawing group at the 4-position undergo electrochemical and yeast-catalysed N-O bond cleavage. The electrolysis is much more efficient and, with acyl- and alkoxycarbonyl-substituted isoxazoles, it affords the enolised dicarbonylimine functionality characteristic of the herbicide Grasp (R). Regioisomeric 4- and 5-substituted isoxazoles are accessible through nitrile oxide cycloaddition chemistry, using halogen as a steric auxiliary to control the regiochemistry of reaction. Crystal data for compounds 11 and 19b are presented.Christopher J. Easton, Graham A. Heath, C. Merrîcc M. Hughes, Connie K. Y. Lee, G. Paul Savage, Gregory W. Simpson, Edward R. T. Tiekink, George J. Vuckovic and Richard D. Webste