Suzuki cross-coupling catalyzed by palladium (II) complexes bearing 1-aryl-3,4,5,6-tetrahydropyrimidine ligands

A novel highly efficient monodentate imine palladium catalyst system has been tested for Suzuki cross-coupling reaction. Under the standard conditions, a series of aryl halides, including phenyl iodide, aryl bromides and phenyl chloride, were coupled with phenylboronic or 1-naphthylboronic acid, producing the corresponding biaryls in good to excellent yields. High-resolution transmission electron microscopy (HR-TEM) study of the recycled catalyst showed the formation of palladium nano particles in the catalytic system. (C) 2012 Elsevier B. V. All rights reserved.