چكيده به لاتين
Desing and preparation of polyethylene glycol sulfonic acid surface coated magnetic nanoparticles (Fe3O4/PEG-OSO3H) is described. The morphology of the prepared nanocomposite was rod-like along with the spherical nanoparticles. It was characterized by Fourier transforms infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), vibrating sample magnetometer (VSM), N2 adsorption-desorption by Brunauer- Emmett- Teller (BET). Furthermore, this novel heterogeneous catalyst was successfully performed in a multicomponent one-pot reaction for the synthesis of dihydropyrimidine derivatives. This efficient protocol includes some other advantages such as using ethanol as a green solvent, no significant decrease in the activity of the nanocatalyst during recovery process, relatively short reaction times and high-to-excellent yields of the products.
