Nickel-catalyzed 1,2-dialkenylation of <i>o</i> -carboranes with alkenyl bromides

A nickel-catalyzed cross-coupling reaction of <i>o</i>-carboranyl with alkenyl bromides has been developed, affording a series of 1,2-dialkenylated <i>o</i>-carboranes with a broad substrate scope. This reaction provides an efficient and concise strategy for <i>C</i>,<i>C</i>'-dialkenylation of <i>o</i>-carboranes and supplements the transition-metal catalyzed cage B-H functionalization systems.