Rhodium‐Catalyzed Annulation of N‐Benzoylsulfonamide with Isocyanide through CH Activation

The first rhodium-catalyzed annulation of N-benzoylsulfonamide (1) with isocyanide (2) through CH activation is described. The transformation is broadly compatible with N-benzoylsulfonamides as well as isocyanides with different electronic properties. From a practical point of view, this method provides the most straightforward approach to a series of 3-(imino)isoindolinones (3). Ts=4-toluenesulfonyl.