New catalytic system for the synthesis of imidazo[1,2-a]pyridines by the Ugi reaction
作者:M. A. Mironov、M. I. Tokareva、M. N. Ivantsova、V. S. Mokrushin
DOI:10.1007/s11172-006-0494-6
日期:2006.10
is proposed as an efficient catalyst for the preparation of a great variety of imidazo[1,2-a]pyridine derivatives by three-component condensation of aromatic isocyanides, aldehydes, and 2-aminopyridine. The advantages of this procedure are high yields of the target products and the absence of side reactions.
N-羟基琥珀酰亚胺和对甲苯磺酸的组合被提议作为一种有效的催化剂,用于通过芳族异氰化物、醛和 2-氨基吡啶的三组分缩合制备多种咪唑并[1,2-a]吡啶衍生物. 该程序的优点是目标产物的收率高且不存在副反应。