摘要:
Na[AuCl4] reacts with [py{SCH2C(O)R}-2] (py-2 = 2-pyridyl) at room temperature to give cyclometalated alkylgold(III) complexes [AuCl2{py{SCHC(O)R}-2}] [R = Ph (1a); Me (1b), OMe (1b)], which in turn react with NaBr or with PR'(3) in the presence of NaClO4 to give [AuBr2{py{SCHC(O)R}-2}] [R = Ph (2a), Me (2b)] or a mixture of SP4-3- and SP4-4-[AuCl-{py{SCHC(O)R}-2}(PPh3)]ClO4 [R = Ph (3a), Me (3b)]. This mixture of isomers converted to the isomer SP4-4 upon refluxing in chloroform. When the last reaction was made using P(C6H4OMe-4)(3), the main products were [AuCl{P(C6H4OMe-4)(3)}] and [Hpy{SCH2C(O)Ph}2]ClO4. The crystal structure of the latter has been determined.