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A novel and convenient procedure for the synthesis of thiazolidine derivatives has been described. The reaction of primary alkylamines, isothiocyanates and maleic anhydride in the presence of magnetically supported sulfuric acid on Fe3O4@SiO2 nanoparticles (MNPs@SiO2-SO3H) as a heterogeneous catalyst led to synthesis of thiazolidine derivatives. The desired products were obtained in moderate to good yields. Important Advantages of this method are easy and fast catalyst separation, simple purification procedure, facile procedure and mild condition. The synthesized products were fully characterized by FT-IR, Hand CNMR and elemental analyses. The structure of MNPs@SiO2-SO3H was identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and x-ray powder diffraction (XRD).

Synthesis of thiazolidine derivatives via multicomponent reaction in the presence of Fe3O4@SiO2-SO3H nanoparticles as a heterogeneous catalyst