The First Si-H-B Bridge: Combination of 1,1-Organoboration and Hydrosilylation

Abstract

Activation of the Si−H bond is observed for 1, which is obtained from the reaction of triallylborane with bis(dimethylsilyl)ethyne, as the result of the neighboring three-coordinate boron atom [Eq. (1)]. Compound 1 undergoes facile intramolecular hydrosilylation without a catalyst (!) to give 2.