The synthesis, characterization, and catalytic properties of (κ2 - C, N)-palladacycles with N-heterocyclic carbene-based ancillary ligands

Abstract

Novel five-membered (κ2-C, N)-palladacyclic complexes were prepared from the reaction of the corresponding acetate-bridged palladacycle dimer with N-heterocyclic carbene (NHC) ligands in high yields. Palladacyclic complexes (3) were fully characterized by elemental analysis and 1H and 13C NMR spectroscopy. Palladacyclic complexes were tested as catalyst for the C-C bond forming reaction. These complexes were found to be efficient catalysts for the Suzuki-Miyaura reaction of aryl bromides.