Synthesis of palladium nanoparticles supported on modified Merrifield resin as a novel heterogeneous catalyst for C-C cross coupling reactions

Palladium-catalyzed cross-coupling reactions are one of the most important synthetic tools in modern organic synthesis. Variousresearch groups have dedicated efforts to the development of C-C coupling methods based on the well-established chemistry of Pd0 and PdII species [1-5]. A new palladium catalyst based on modified Merrifield resin was synthesized. The structure of the catalyst was established by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). This study revealed that palladium is well-dispersed with typical diameter of nanometer. The catalyst was employed in C-C reactions with aryl halides and produced promising results. The catalyst was recycled and used in five successive runs without loss of the catalytic activities.