Rhodium‐Catalyzed N‐Arylation Addition of Arylboronic Acids to Ketimines

Comprehensive Summary Herein, we report rhodium catalyzed N ‐arylation via addition of arylboronic acids to electron‐deficient α ‐iminoesters which can be prepared in high efficiency by using easily accessible β ‐carbonyl esters. The reaction is highly regiospecific to achieve the N ‐aryl addition efficiently with up to 99% yield under mild conditions. The corresponding product can be further efficiently converted into indoles and a series of other important building blocks.