Synthesis of α-tertiary allylsilanes by palladium-catalyzed hydrosilylation of 1,1-disubstituted allenes

We herein report an effective hydrosilylation of 1,1-disubstituted allenes with a palladium catalyst modified by a monophosphorus ligand, leading to a series of α-tertiary allylsilanes in high yields and exceptional regioselectivities. The employment of BI-DIME is essential for the high reactivities and selectivities. A chiral α-tertiary allylsilane is formed in excellent ee for the first time by employing a chiral monophosphorus ligand.