Synthesis of 3-alkenylated indole and <i>bis</i>(indol-3-yl) derivatives catalyzed by sulfonic acid-functionalized ionic liquid under ultrasound irradiation
作者:Saroj Budania、Ganesh M. Shelke、Anil Kumar
DOI:10.1080/00397911.2016.1278232
日期:2017.4.3
ABSTRACT A simple and efficient protocol has been developed for the synthesis of 3-alkenylated indoles and bis(indol-3-yl) derivatives by sulfonic acid-functionalized ionic liquid-catalyzed reaction of indole with 1,3-diketones/3-ketoesters under solvent-free ultrasound irradiation. Good to excellent yields (68–94%) are obtained in ultrasonication. The product of reaction is dependent on the substituent