Synthesis of Dichlorobis(1,4-dimesityl-1H-1,2,3-triazol-5-ylidene)palladium [PdCl2(TMes)2] and Its Application to Suzuki-Miyaura Coupling Reaction

The palladium complex bearing a novel NHC-ligand derived from 1,4-dimesityl-1,2,3-tirazole was prepared. The complex catalyzed the Suzuki-Miyaura coupling reaction with aryl chloride successfully to give biaryls in excellent yields, particularly very effective for the sterically hindered reaction between o-substituted arylchlorides and o-substituted phenylboronic acids.