Rhodium catalyzed C–H olefination of N-benzoylsulfonamides with internal alkenes

An annulation via tandem rhodium catalyzed C–H olefination of N-benzoylsulfonamides with internal olefins followed by C–N bond formation is disclosed. A N-substituted quaternary center is formed during the reaction thus providing efficient access to a series of 3,3-disubstituted isoindolinones.