fe3o4@sio2-ptms-guanidine-sa nanoparticles as an effective and reusable catalyst for the synthesis of n-substituted pyrroles

Fe3o4@sio2-ptms-guanidine-sa nanoparticles used as an effective catalyst for the synthesis of n-substituted pyrroles. pyrroles were synthesized from the reaction between primary amine derivatives and 2,5-hexanedione with high to excellent yields under mild reaction conditions. after completion of the reaction, fe3o4@sio2-ptms-guanidine-sa magnetic nanoparticles could be recovered easily from the reaction mixture by an external magnet and reused. this catalyst was characterized by ft-ir spectroscopy, scanning electron microscopy, energy-dispersive x-ray spectroscopy, x-ray diffraction, thermogravimetric analysis and vibrating-sample magnetometry techniques.