The in Situ NHC-Palladium Catalyzed Selective Activation of B(3)-H or B(6)-H Bonds of -Carboranes for Hydroboration of Alkynes: An Efficient Approach to Alkenyl--carboranes.

An in situ Pd-NHC catalyzed selective B(3,6)-H activation for hydroboration of internal alkynes has been accomplished under mild conditions. This work offers a facile approach for the synthesis of alkenyl--carboranes and has important reference for selective functionalization of B(3,6)-H bonds.