catalysts is reported. The boron Lewis acid tris(pentafluorophenyl)borane accelerates the slow uncatalyzed reaction of ketenes and hydrosilanes, thereby providing a convenient access to the new class of β,β-di- and β-monoaryl-substituted aldehyde-derived silyl enol ethers. Yields are moderate to high, and Z configuration is preferred. The corresponding silyl bis-enol ethers are also available when using
报道了由主族催化剂促进的烯酮氢化
硅烷化的研究很少。
硼路易斯酸三(
五氟苯基)
硼烷加速了烯酮和氢
硅烷的缓慢未催化反应,从而为获得新型 β,β-二-和 β-单芳基取代的醛衍生的甲
硅烷基烯醇醚提供了便利。产量中等至高,Z型配置是首选。当使用二氢
硅烷时,也可以使用相应的甲
硅烷基双烯醇醚。相关的三苯甲基阳离子引发的氢化
硅烷化涉及甲
硅烷离子的自我再生,效果要差得多。