Magnesium-catalyzed hydrosilylation of α,β-unsaturated esters.

ToMgHB(CF) (, To = tris(4,4-dimethyl-2-oxazolinyl)phenylborate) catalyzes the 1,4-hydrosilylation of α,β-unsaturated esters. This magnesium hydridoborate compound is synthesized by the reaction of ToMgMe, PhSiH, and B(CF). Unlike the transient ToMgH formed from the reaction of ToMgMe and PhSiH, the borate adduct persists in solution and in the solid state.