Rhodium-Catalyzed B(4)-H and B(3)-H Alkylation Reaction of Pyridyl o-Carboranes with α-Diazodicarboxylates.

An efficient Rh-catalyzed B(4)-H and B(3)-H alkylation reaction was demonstrated from the reactions of a variety of pyridyl o-carboranes with α-diazodicarboxylates with the release of molecular nitrogen, leading to the production of B(4)-H and B(3)-H alkylated o-carboranes in good to excellent yields with high selectivity, a wide substrate scope, and good functional group tolerance.