The first general, highlyenantioselectivehydrosilylation of benzoxazinones and quinoxalinones has been developed. The chiral Lewisbase organocatalysts that are readily accessible from (1S,2R)‐ephedrine and (1R,2S)‐ephedrine promoted the title reaction to afford various chiral dihydrobenzoxazinones and dihydroquinoxalinones with good yields as well as good enantioselectivities.
Using readily available manganese pentacarbonyl bromide as a regeneration catalyst, biomimeticasymmetric reduction of imines including quinoxalinones, benzoxazinones, and benzoxazine has been successfully developed in the presence of transfer catalyst chiral phosphoric acids, providing the chiral amines with high yields and enantioselectivities.