Immobilized palladium-pyridine complex on ?-Fe2O3 magnetic nanoparticles as a new magnetically recyclable heterogeneous catalyst for Heck, Suzuki and copper-free Sonogashira reactions

Abstract

A new immobilized palladium-pyridine complex on γ-Fe2O3 magnetic nanoparticles was synthesized and characterized by SEM, TEM, TGA, ICP, XPS, XRD, FT-IR and CHN analyses. The catalytic activity of the synthesized catalyst has been investigated in Heck, Suzuki and Sonogashira coupling reactions using a series of aryl halides. The catalyst was easily isolated from the reaction mixture by an external magnetic field and reused several times with no significant loss of catalytic activity.