Synthesis of substituted pyrrole derivatives in solvent free media with molybdenum complex supported on magnetic nanoparticles as recyclable catalyst

Metal complexes immobilized onto metal nanoparticles are a category of relatively new promising materials for catalysis and analytical chemistry [1-2]. A magnetically recoverable catalyst consisting of molybdenum complex was prepared. The synthesized catalyst was characterized by X-ray powder diffraction (XRD), vibrating sample magnetometry (VSM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and Fourier transform infrared (FT-IR). The immobilized catalyst was shown to be an efficient heterogeneous catalyst for the synthesis of substituted pyrroles [3]. The catalyst could be easily and efficiently isolated from the final product solution by magnetic decantation and be reused for 5 consecutive reactions without showing any significant activity degradation.