efficient method for the Lewis acid-catalyzed trans-selective hydrosilylation of alkenes has been developed. The mechanism of this novel protocol operates via direct addition of silylium type species across C=C bond followed by trapping of the resultant carbenium ion with boron-bound hydride. A number of diversely substituted silanes possessing both aryl and alkyl groups at silicon atom were efficiently prepared
已经开发了一种方便高效的烯烃
路易斯酸催化的反选择氢化
硅烷化方法。该新方案的机理是通过在C = C键上直接添加甲
硅烷基型物质,然后用
硼键合的
氢化物捕集所得的碳正离子而起作用。使用这种氢化
硅烷化方法可以有效地制备许多在
硅原子上同时具有芳基和烷基的不同取代的
硅烷。在该反应中使用含芳基的氢
硅烷的可能性为通过反式选择性氢化
硅烷化/ Tamao-Fleming氧化顺序(与现有的顺式选择性氢
硼化/氧化方案互补)合成醇提供了广泛的能力。