Rhodium-Catalyzed Asymmetric Arylation of N-Tosyl Ketimines

A rhodium-catalyzed addition of sodium tetraarylborates to N-tosyl ketimines is described. Highly efficient asymmetric catalysis has been achieved by employing a chiral diene ligand, constructing chiral amine derivatives possessing alpha-tetrasubstituted carbon stereocenters with high enantioselectivity.