title: Synthesis, structure and cytotoxicity studies of diisopropylammonium and triethylammonium salts of triphenylphosphinegold(I) sulfanylcarboxylates.
abstract: Compounds of the type [HQ][Au(PPh(3))(xspa)] and [HP][Au(PPh(3))(xspa)] {HQ=diisopropylammonium; HP=triethylammonium; H(2)xspa=3-aryl-2-sulfanylpropenoic acids [x: p=3-phenyl-, f=3-(2-furyl)-, t=3-(2-thienyl)-, -o-py=3-(2-pyridyl)-, Clp=3-(2-chlorophenyl)-, -o-mp=3-(2-methoxyphenyl)-, -p-mp=3-(4-methoxyphenyl)-, -o-hp=3-(2-hydroxyphenyl)-, -p-hp=3-(4-hydroxyphenyl)-, diBr-o-hp=3-(3,5-dibromo-2-hydroxyphenyl]} were synthesized and characterized by IR and NMR ((1)H, (13)C and (31)P) spectroscopy and by FAB mass spectrometry. The structures of [HQ][Au(PPh(3))(Clpspa)] and [HQ][Au(PPh(3))(-o-mpspa)] show that the crystal contains hydrogen-bonded diisopropylammonium cations and [Au(PPh(3))(xspa)](-) anions. The anions in the two compounds have different structures, with the carboxylate group either coordinated or not coordinated to the gold atom, respectively. The in vitro antitumour activities against the HeLa-229, A2780 and A2780cis cell lines were determined for all complexes. The diisopropylammonium derivatives were generally found to be more active, in particular against the A2780cis cell line, and showed a high ability to circumvent the cellular resistance to cisplatin.
authors.affiliation: Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
authors.forename: Elena
authors.initials: E
authors.lastname: Barreiro
authors.forename: José S
authors.initials: JS
authors.lastname: Casas
authors.forename: María D
authors.initials: MD
authors.lastname: Couce
authors.forename: Agustín
authors.initials: A
authors.lastname: Sánchez
authors.forename: Angeles
authors.initials: A
authors.lastname: Sánchez-González
authors.forename: José
authors.initials: J
authors.lastname: Sordo
authors.forename: José M
authors.initials: JM
authors.lastname: Varela
authors.forename: Ezequiel M Vázquez
authors.initials: EM
authors.lastname: López
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D018360:Crystallography, X-Ray; D004354:Drug Screening Assays, Antitumor; D006367:HeLa Cells; D006801:Humans; D015394:Molecular Structure; D050607:Organogold Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D050607:Organogold Compounds; D000644:Quaternary Ammonium Compounds; C066585:triethylammonium cation