Isolated, bench-stable, non-symmetric diarylmethylium salts have been reacted with cyclic silyl enol ethers. Products have been easily obtained in a prevalent diastereoselectivity irrespective of salt counter-anion, aromatic ring substitution and silyl enol ether ring size. X-ray analyses on two purified diastereomers have been performed; the observed diastereoselectivity has been confirmed and rationalised
分离出的,稳定的,不对称的二芳基二甲基鎓盐已与环状甲
硅烷基烯醇醚反应。不论盐抗衡阴离子,芳族环取代和甲
硅烷基烯醇醚环的大小如何,都易于以普遍的非对映选择性获得产物。已对两种纯化的非对映异构体进行了X射线分析;观察到的非对映选择性已通过DFT计算得到证实并合理化。