Sulfated Tin Oxide: A Reusable and Highly Efficient Heterogeneous Catalyst for the Synthesis of 2,4,5-Triaryl-1<i>H</i>-imidazole Derivatives
作者:Satish A. Dake、Mahesh B. Khedkar、Ghanshyam S. Irmale、Suhas J. Ukalgaonkar、Vinod V. Thorat、Suhas A. Shintre、Rajendra P. Pawar
DOI:10.1080/00397911.2010.541744
日期:2012.5.15
three-component condensation of benzil/benzoin, substituted aromatic aldehydes, and ammonium acetate in an ethanol–water (1:1, v/v) solvent system using sulfated tin oxide catalyst under reflux condition afforded corresponding 2,4,5-triaryl-1H-imidazoles in excellent yield. The remarkable advantages offered by this method include green and reusable catalyst, mild reaction conditions, fast reaction rate