Aminopropylated PEG as a novel, eco-friendly and biodegradable basic catalyst for bis-Michael addition to α,β-unsaturated ketones under solvent-free conditions
作者:Tabassum Khan、Zeba N. Siddiqui
DOI:10.1002/aoc.3171
日期:2014.8
A solvent‐free and highly efficient protocol has been developed for the synthesis of novel bis‐Michael addition products (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, 3o) using aminopropylated PEG‐6000 (NH2‐PEG) as a biodegradable and recyclable catalyst in excellent yields under solvent‐free conditions. Other remarkable features of this environmentally benign protocol are shorter reaction
已开发出一种无溶剂且高效的方案,用于合成新型bis-Michael加成产物(3a,3b,3c,3d,3e,3f,3g,3h,3i,3j,3k,3l,3m,3n,3o)使用氨基丙基化PEG‐6000(NH 2‐PEG)作为可生物降解和可循环使用的催化剂,在无溶剂条件下具有出色的收率。与传统方法相比,这种对环境无害的方案的其他显着特点是反应时间短,对广泛的C-H活化酸具有耐受性,产物收率高以及简单的实验和后处理程序。NH 2 -PEG催化剂的特征在于使用FT-IR,粉末XRD和扫描电子显微镜-能量色散X射线光谱分析。催化剂可以循环使用几次,而不会显着降低其催化活性。版权所有©2014 John Wiley&Sons,Ltd.