An efficient and green synthesis of benzo[4,5]imidazo[1,2-a]pyrimidines using highly active and stable poly acrylic acid-supported layered double hydroxides
作者:Mudumala Veeranarayana Reddy、Gangireddy Chandra Sekhar Reddy、Nguyen Thi Kim Lien、Dong Wook Kim、Yeon Tae Jeong
DOI:10.1016/j.tet.2017.01.037
日期:2017.3
facile and efficient method for the synthesis of benzo[4,5]imidazo[1,2-a]pyrimidines has been achieved via highly active and reusable heterogeneous poly acrylic acid-supported layered double hydroxides (PAA-g-LDHs) catalyst promoted one-pot reaction of 1H-benzo[d]imidazol-2-amine, with α,β-unsaturated carbonyl compounds under solvent-free conditions. PAA-g-LDHs catalyst was successfully synthesized via
通过促进高活性和可重复使用的非均相多聚丙烯酸负载的层状双氢氧化物(PAA- g -LDHs)催化剂的合成,已实现了一种简便高效的合成苯并[4,5]咪唑并[1,2- a ]嘧啶的方法1H-苯并[ d ]咪唑-2-胺与α,β-不饱和羰基化合物在无溶剂条件下的一锅反应。PAA- g ^通过接枝反应可逆加成-断裂链转移聚合成功合成了-LDHs催化剂,并通过不同的分析技术对其进行了表征。该反应的显着特征包括方便的一锅法,短反应时间,优异的收率,广泛的底物范围和操作简便性。同样,该催化剂可以重复使用几次连续运行而其催化活性没有任何明显的损失。