Cyclometalated cis-Chelated Bidentate N-Heterocyclic Carbene Palladium Complexes: Synthetic, Structural, and Catalytic Studies

Novel cyclometalated cis-chelated bidentate N-heterocyclic carbene palladium complexes derived from binaphthyl-2,2′-diamine (BINAM) have been successfully synthesized, and the cyclometalated cis-chelated bidentate NHC−palladium(II) complex 5a has been characterized by X-ray crystal structure diffraction. Moreover, we found that these novel NHC−palladium(II) complexes are quite effective in Suzuki−Miyaura coupling reactions and Friedel−Crafts reactions under mild conditions.