Synthesis of a novel tetracationic acidic organic salt based on DABCO and its applications as catalyst in the Knoevenagel condensation reactions in water
作者:Azim Ziyaei Halimehjani、Vahid Barati、Mahshad Karimi
DOI:10.1080/00397911.2019.1570268
日期:2019.3.4
Abstract Synthesis of a novel tetracationic acidic organic salt based on DABCO containing two sulfonic acid groups in the skeleton and four hydrogensulfate groups as counterion is described. Its catalytic efficiency in the Knoevenagel condensation of aldehydes with active cyclic methylene compounds in water is investigated. While 2,2'-(phenylmethylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-enone) derivatives
摘要 描述了一种基于 DABCO 的新型四阳离子酸性有机盐的合成,该盐在骨架中含有两个磺酸基团和四个硫酸氢基团作为抗衡离子。研究了其在醛与活性环状亚甲基化合物在水中的 Knoevenagel 缩合中的催化效率。虽然在醛与二甲酮的反应中以 40-98% 的分离产率获得了 2,2'-(苯基亚甲基)双(3-羟基-5,5-二甲基环己-2-烯酮)衍生物,但相应的 Knoevenagel 加合物在使用 1,3-二甲基巴比妥酸的产率为 85-95%。此外,首次制备并表征了基于 DABCO 的聚阳离子有机盐聚合物。图形概要