Ardeshir Khazaei - Faculty of Chemistry, Bu-Ali Sina University, Hamedan, ۶۵۱۷۸۳۸۶۸۳, I. R. Iran
Fatemeh Gohari-Ghalil - Faculty of Chemistry, Bu-Ali Sina University, Hamedan, ۶۵۱۷۸۳۸۶۸۳, I. R. Iran
Mahsa Tavasoli - Faculty of Chemistry, Bu-Ali Sina University, Hamedan, ۶۵۱۷۸۳۸۶۸۳, I. R. Iran
Mohammad Rezaei-Gohar - Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, ۶۵۴۱۸۶۱۸۴۱, I. R. Iran

Fe3O4bonded pyridinium-3-carboxylic acid-N-sulfonic acid chloride, as a magnetic and reusable catalyst, was reported for the one-pot multi-component synthesis of some 3,4-dihydropyrimidin-2(1H)-ones by the reaction of urea, ethyl acetoacetateand various aldehyde under solvent-free conditions. The products were identified by FT-IR, 1H NMR and 13C NMR spectra and the catalyst was reused successfully for three times.

3, 4-Dihydropyrimidin-2(1H)-one, Fe3O4 bonded pyridinium-3-carboxylic acid-N-sulfonic acid chloride, Magnetic reusable catalyst, Solvent-free