Copper-Catalyzed B–H Bond Insertion Reaction: A Highly Efficient and Enantioselective C–B Bond-Forming Reaction with Amine–Borane and Phosphine–Borane Adducts

A copper-catalyzed B–H bond insertion reaction with amine– and phosphine–borane adducts was realized with high yield and enantioselectivity under mild reaction conditions. The B–H bond insertion reaction provides a new C–B bond-forming methodology and an efficient approach to chiral organoboron compounds.