Regioselective palladium(ii)-catalyzed aerobic oxidative Heck-type C3 alkenylation of sulfocoumarins

An efficient method for the direct C-H olefination of sulfocoumarins with a wide range of arkenes developed. Moreover, O-2 was successfully utilized as the sole oxidant for the oxidative Heck reaction. This approach enables the rapid generation of various 3-alkenylated sulfocoumarins.