Mechanistic Studies on a New Catalyst System (CuI-NaHSO4×SiO2) Leading to the One-Pot Synthesis of Imidazo[1,2-a]pyridines from Reactions of 2-Aminopyridines, Aldehydes, and Terminal Alkynes
作者:Rina Ghosh、Sarita Mishra
DOI:10.1055/s-0030-1260255
日期:2011.11
One-pot reactions of aldehydes, 2-aminopyridines, and terminal alkynes, in the presence of the copper(I) iodide-NaHSO4˙SiO2 combination catalyst in refluxing toluene, generate the corresponding imidazo[1,2-a]pyridines in high to excellent yields; the mechanism has been studied. CuI-NaHSO4˙SiO2 - one-pot synthesis - imidazo[1,2-a]pyridine - 2-aminopyridine - cascade reaction