The stereoselective syntheses of alpha-silylenones using catalytic PtCl(2) are reported. Via alkyne activation, alpha-hydroxypropargylsilanes are converted to (Z)-silylenones through a highly selective silicon migration. The complementary (E)-silylenones are accessed by a regioselective hydrosilylation of the ynone precursor. The synthetic utility of these compounds is demonstrated in cross-coupling
报道了使用催化 PtCl(2) 立体选择性合成 alpha-silylenones。通过
炔烃活化,α-羟基炔丙基
硅烷通过高度选择性的
硅迁移转化为 (Z)-甲
硅烷酮。互补的 (E)-甲
硅烷基酮通过炔酮前体的区域选择性氢化
硅烷化获得。这些化合物的合成效用在交叉偶联反应中得到证明,突出了这些协议在合成几何定义的三取代烯烃方面的潜力。