Efficient Synthesis of 3-Aminoimidazo[1,2-a] Pyridines Using Silica-Supported Perchloric Acid (HClO4-SiO2) as a Novel Heterogenous Catalyst
作者:Azizollah Habibi、Zahra Tarameshloo、Shahnaz Rostamizadeh、Ali M. Amani
DOI:10.2174/157017812800167439
日期:2012.3.1
An efficient and green protocol for synthesis of 3-aminoimidazo[1,2-a] pyridine derivatives through a three-component reaction of aldehyde, 2-amino pyridine and isocyanide in the presence of silica-supportedperchloricacid (HClO4-SiO2) is described in this paper. The solid catalyst could be recycled and reused.
A facile and eco-friendly synthesis of imidazo[1,2-a]pyridines using nano-sized LaMnO3 perovskite-type oxide as an efficient catalyst under solvent-free conditions
and reusable catalyst showed excellent catalytic activity for the synthesis of imidazo[1,2-a]pyridines. LaMnO3 catalyst could be recovered and reused in five reaction cycles, giving a total TON = 2790 and TOF = 372. The products were prepared under solvent-free conditions without any additives. Principal features of this simple method include non-hazardous reaction conditions, low catalyst loading and