Merging Platinum-Catalyzed Alkene Hydrosilylation with SiH₄ Surrogates: Salt-Free Preparation of Trihydrosilanes

Abstract

The monosilane (SiH4) surrogate di(cyclohexa-2,5-dien-1-yl)silane is shown to be compatible with platinum-catalyzed hydrosilylation of α-olefins. The cyclohexa-2,5-dien-1-yl substituents in the monohydrosilylation adducts serve as protecting groups, and treatment with catalytic amounts of B(C6F5)3 liberates the Si–H bonds along with benzene. By this, trihydrosilanes become accessible in two steps without the formation of salt waste.