A palladium-catalyzed synthesis of cyclic alkenyl boronates from alkenyl chlorides.

A palladium-catalyzed borylation of cyclic alkenyl chlorides with B 2 pin 2 is reported. This transformation allows for the conversion of diverse cyclic alkenyl chlorides into synthetically versatile alkenyl boronates with moderate to excellent yields. The utility of this reaction has been demonstrated with practical Suzuki-Miyaura coupling and aziridination reactions, which allow access to functionalized olefins and valuable boron-substituted aziridines.