Regulation of equilibria in the catalytic asymmetric allylic transfer reaction: unusual 1,2-carbonyl addition of 3trimethylsilyl-2-propenylstannane

Catalytic enantioselective addition of 3-trimethylsilyl-2-propenylstannane to aldehydes promoted by BINOL–Ti(IV) catalyst along with synergistic reagent provides unusual 1,2-adducts with high levels of enantioselectivity.