Magnetic dendritic polymer nanocomposites as supports for palladium: a highly efficient and reusable catalyst for Mizoroki–Heck and Suzuki–Miyaura coupling reactions

Abstract

A novel catalyst Fe₃O₄@SiO₂-Dendrimer-Pd based on palladium immobilized on magnetic dendritic polymer nanocomposites was successfully synthesized and characterized by FT-IR, EA, XRD, TEM, EDX, VSM and XPS. This nanocatalyst showed excellent catalytic activity for solvent-free Mizoroki–Heck reaction and Suzuki–Miyaura reaction in EtOH/H₂O at a palladium loading of only 0.009 mol%. Moreover, the Fe₃O₄@SiO₂-Dendrimer-Pd catalyst could be conveniently recovered by an external magnet and used consecutively five times with excellent yields. The remarkable catalytic performances and convenient magnetic separability of the Fe₃O₄@SiO₂-Dendrimer-Pd catalyst make it promising for practical application.