Fuberidazole has been successfully immobilized onto nano‐Fe3O4 supported (3‐chloropropyl)trimethoxysilane (3‐CPTS) leading to a novel functionalized magnetic nanoparticle (FB/MNP). The Pd(0) complex, Pd‐FB/MNP, was prepared by grafting Pd (OAc)2 on FB/MNP and subsequent reduction of a synthesized Pd (II) complex using NaBH4. Pd‐FB/MNP has been characterized by FT‐IR, SEM, TGA, XRD, ICP, EDS, BET and VSM. The Pd(0) complex proved to be an efficient phosphine‐ and halide‐free recyclable heterogeneous catalyst for Suzuki as well as for Stille C‐C coupling reactions showing high catalytic activity (up to 98%). Its catalytic activity in both reactions has been studied in PEG‐400 as a green solvent. Besides, the selectivity of aryl iodide and aryl bromide over aryl chloride is observed during the C‐C coupling reaction. The catalyst could be recovered easily from the reaction mixture using an external magnet device and recycled several times without considerable loss in activity. Additionally, the results of a palladium leaching test of the nano‐catalyst demonstrate that no leaching of Pd took place during the C‐C coupling process making the procedure environmentally friendly.

The synthesis of an efficient heterogeneous nanocatalyst was prepared by the anchoring of palladium complex on the surface of an imidazolium-based ionic liquid-functionalized Fe 3 O 4 (Pd-imidazolium@Fe 3 O 4 NPs). The nanocatalyst, Pd-imidazolium@Fe 3 O 4 NPs, was characterized by Raman, X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), fourier transform infrared (FT-IR), inductively coupled plasma (ICP), and vibrating sample magnetometer (VSM) techniques. The catalytic performance of this novel nanocatalyst was evaluated in the Heck--Mizoroki and Suzuki-Miyaura cross-coupling reactions under mild conditions using PEG-400 as a green and biodegradable solvent. The nanocatalyst exhibited high catalytic activity for both cross-coupling reactions. Furthermore, this stable nanocatalyst can be easily removed and recovered from the reaction mixture and reused for at least eight consecutive cycles without a discernible decrease in the catalytic activity. Also, the recovered Pd-imidazolium@Fe 3 O 4 NPs was characterized by FT-IR, XRD, scanning electron microscopy, energydispersive X-ray spectroscopy, and atomic absorption spectroscopy techniques.