Fabrication of Fe3O4-Bis(Py-Imine)-PdCl2 Nanocomposite as a Highly Active Nanomagnetic Catalyst for Carbonylative Suzuki Reactions of Phenylboronic Acid with Aryl Iodides and Mo(CO)6

In the research work, a novel and recoverable nanomagnetic pallidum catalyst [Fe3O4-Bis(Py-Imine)-PdCl2] based on the immobilization of Pd on the surface of magnetic Fe3O4 nanoparticles modified with picolylamine as ligand was designed and fabricated. The structure of the as-fabricated Fe3O4-Bis(Py-Imine)-PdCl2 nanocatalyst was characterized by FT-IR spectroscopy, SEM, TEM, EDX, ICP-OES, TGA, VSM, XRD and EDX mapping techniques. The Fe3O4-Bis(Py-Imine)-PdCl2 nanocomposite demonstrated the high activity in the preparation of diaryl ketones through one-pot three-component Suzuki reactions of phenylboronic acids with aryl iodides and Mo(CO)6. The recycling of the Fe3O4-Bis(Py-Imine)-PdCl2 catalyst was examined in the coupling of phenylboronic acid with 4-methyl iodobenzene and Mo(CO)6; the results revealed that this catalyst could be reused for more than 6 consecutive runs without a loss of activity. This method offers several remarkable features, such as high yield of products, simplicity of separation of products from catalysts, performing reactions in green solvent and mild conditions, ability to recycle and reusing the catalyst without significant reduction in its catalytic activity.