Enantioselective Rh-Catalyzed Addition of Arylboronic Acids to N-Tosylarylimines

A highly enantioselective rhodium-catalyzed addition of arylboronic acids to N-tosylarylimines is described, using chiral -binaphtholic phosphite and phosphoramidite ligands. The best ee values (76-99%), associated with moderate to good chemical yields, were obtained with binaphtholic phosphoramidite ligands containing a bulky chiral amine.