Author/Authors :
Hamadi، Hosein نويسنده Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz, Iran , , Gholami، Maryam نويسنده Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz, Iran , , Khoobi، Mehdi نويسنده Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 14176, Iran ,
Abstract :
A novel magnetically immobilized polyethyleneimine (PEI) fabricated by covalently anchoring on silica coated Fe3O4 nanoparticles (PEI@Si-MNPs) was prepared. The synthesized catalyst was characterized by Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The immobilized PEI was shown to be an efficient heterogeneous catalyst for the synthesis of spiro-oxindole, benzopyranes and chromene derivatives via multi-component reaction (MCR), in water as a green solvent. The catalyst is readily recovered by simple magnetic decantation and can be recycled several times with no significant loss of catalytic activity.
