Relative Rates of Hydrosilylation of Representative Alkenes and Alkynes by Cp*<sub>2</sub>YMe·THF and [Cp<sup>TMS</sup><sub>2</sub>YMe]<sub>2</sub>
作者:Gary A. Molander、Elizabeth E. Knight
DOI:10.1021/jo9809027
日期:1998.10.1
Reactivity in the hydrosilylation of alkenes and alkynes catalyzed by the organoyttrium catalysts Cp(2)YMe.THF and [Cp(TMS)(2)YMe](2) is generally determined by the steric environment of the substrate. Alkynes and conjugated alkenes show an increased reaction rate because of electronic effects; the magnitude of this increase is highly substrate dependent. The electron rich pyrrole system is particularly