화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.132, No.44, 15534-15536, 2010
Palladium-Catalyzed Asymmetric Benzylation of 3-Aryl Oxindoles
Herein we report palladium-catalyzed asymmetric benzylic alkylation with 3-aryl oxindoles as prochiral nucleophiles. Proceeding analogously to asymmetric allylic alkylation, asymmetric benzylation occurs in high yield and enantioselectivity for a variety of unprotected 3-aryl oxindoles and benzylic methyl carbonates using chiral bisphosphine ligands. This methodology represents a novel asymmetric carbon-carbon bond formation between a benzyl group and a prochiral nucleophile to generate a quaternary center.