1,2-Diborylsilanes: Catalytic Enantioselective Synthesis and Site-Selective Cross-Coupling.

A Pt-catalyzed enantioselective hydrosilylation of ( Z )-1,2-diborylethylene provides a 1,2-diboryl-1-silylalkane that can be used in catalytic cross-coupling reactions. Depending on the catalyst employed and the cross-coupling reaction conditions, the coupling can occur at either α or β relative to the silane center.