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
摘要开发了一种简单有效的方案,用于通过磺酸官能化离子液体催化吲哚与 1,3-二酮/3-酮酯反应合成 3-烯基化吲哚和双(吲哚-3-基)衍生物。无溶剂超声辐照。在超声波处理中获得了良好到极好的产率 (68–94%)。反应产物取决于吲哚 C-2 位的取代基。该催化剂可重复使用和循环使用最多四个循环,而不会显着降低其催化活性。与传统加热相比,声波活化具有反应时间短、易于处理、产率高、条件温和等显着优点。图形概要