Nano silica phosphoric acid: as a suitable catalyst for synthesis of trisubstituted imidazoles via sonication condition


1 Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I. R. Iran

2 Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, I. R. Iran


Nano silica phosphoric acid has been found to be a suitable catalyst for the preparation of 2,4,5-tri-substituted imidazoles via three-component reactions of benzil, aldehydes and ammonium acetate under sonication condition.