One-pot synthesis of coumarine derivatives using butylenebispyridinium hydrogen sulfate as novel ionic liquid catalyst
作者:Sobhan Rezayati、Fatemeh Sheikholeslami-Farahani、Faramarz Rostami-Charati、Saeid Afshari Sharif Abad
DOI:10.1007/s11164-015-2261-5
日期:2016.5
reaction of 3-hydroxyphenol and ethyl acetoacetate in the presence of 1,1′‐butylenebispyridinium hydrogen sulfate as an efficient, green, and recyclable catalyst produces 7-hydroxy-4-methylcoumarin in good yield under solvent-free conditions at room temperature. This catalyst has advantages such as the following: good to excellent yields, short reaction times, simplicity in operation, and easy workup procedure
3-羟基苯酚与乙酰乙酸乙酯的Pechmann缩合反应在1,1'-丁烯双吡啶硫酸氢盐存在下作为高效,绿色且可回收的催化剂在室温下无溶剂条件下以良好的收率生产7-羟基-4-甲基香豆素。该催化剂具有以下优点:良好至优异的产率,短的反应时间,操作简单和后处理程序容易。