Alkyne Hydrosilylation Catalyzed by a Cationic Ruthenium Complex: Efficient and General Trans Addition
作者:Barry M. Trost、Zachary T. Ball
DOI:10.1021/ja0528580
日期:2005.12.1
The complex [Cp*Ru(MeCN)3]PF6 is shown to catalyze the hydrosilylation of a wide range of alkynes. Terminal alkynes afford access to alpha-vinylsilane products with good regioselectivity. Deuterium labeling studies indicate a clean trans addition process is at work. The same complex is active in internal alkyne hydrosilylation, where absolute selectivity for the trans addition process is maintained
复合物 [Cp*Ru(MeCN)3]PF6 显示可催化多种炔烃的氢化硅烷化。末端炔烃可以提供具有良好区域选择性的 α-乙烯基硅烷产品。氘标记研究表明,清洁的反式添加过程正在发挥作用。相同的复合物在内部炔烃氢化硅烷化中具有活性,其中保持了反式加成过程的绝对选择性。几种内部炔烃底物类别,包括炔丙醇和 α,β-炔基羰基化合物,允许区域选择性乙烯基硅烷的形成。多种硅烷的耐受性值得注意,包括烷基硅烷、芳基硅烷、烷氧基硅烷和卤代硅烷。这种优势在用于硅系分子内 Diels-Alder 环加成反应的三烯底物的直接合成中得到了证明。