Benzimidazole-based palladium–N-heterocyclic carbene: a useful catalyst for C–C cross-coupling reaction at ambient condition

A convenient way for the synthesis of benzimidazole-based Pd–N-heterocyclic carbene complex and its structural characterization are described. The complex efficiently catalyzes Suzuki cross-coupling reaction in a wide variety of substrates including heteroaromatic system at ambient condition. The catalyst is also effective for multi Suzuki cross-coupling reaction. In addition, the catalyst is equally active toward C–C cross-coupling reaction between acid chloride and arylboronic acid, giving the desired ketones in high yield.