The triangular heterobimetallic sulfido cluster[(Cp*Ir)2(μ3-S)2PdCl2] prepared from [PdCl2(cod)] and [Cp*IrCl(μ-SH)2IrCp*Cl] was found to catalyze the addition of alcohols to alkynes to give the corresponding ketals. In particular, internal 1-aryl-1-alkynes were transformed into the corresponding 2,2-dialkoxy-1-arylalkanes with high regioselectivity. The analogous Ir2PtS2 cluster proved to be much less selective.
研究发现,由[PdCl2(cod)]和[Cp*IrCl(μ-SH)2IrCp*Cl]制备的三角形杂多
金属
硫化物簇[(Cp*Ir)2(μ3-S)2PdCl2]能催化醇与炔的加成反应,生成相应的酮。特别是,内部 1-芳基-1-炔以高区域选择性转化为相应的 2,2-二烷氧基-1-芳基烷。事实证明,类似的 Ir2PtS2 簇的选择性要低得多。