Rhodium(III)-catalyzed asymmetric carboboration of heterobicyclic alkenes

The transition-metal-catalyzed carboboration of heterobicyclic alkenes has been already established, however, the asymmetric version has never been uncovered. Herein, we describe a Rh(III)-catalyzed asymmetric carboboration of heterobicyclic alkenes, including 7-oxa- and 7-azabenzonorbornadienes, via borylative dimerization. During the transformation, another heterobicyclic alkene acts as electrophilic carbon reagent. The carboboration product...