been accomplished based on a pseudo three-component reaction between isatins and 4-hydroxycoumarin in presence of a low-cost and eco-friendly solid sulfamic acid catalyst in aqueous ethanol (1:1, v/v) under reflux condition. The significant features of this newly developed method are metal-free one pot synthesis, use of eco-friendly and cost-effective solvent and catalyst, no column chromatography involvement
开发一个快速和绿色的协议来获取与药学相关和多样化的功能化支架,Spiro [indoline-3,7'-pyrano[3,2- c : 5,6- c ']dichromene]-2,6',8' -trione,基于
靛红和
4-羟基
香豆素之间的假三组分反应在低成本和环保的固体
氨基磺酸催化剂存在下在
乙醇水溶液(1:1,v/v)回流条件下完成. 这种新开发的方法的显着特点是无
金属一锅合成,使用环保且具有成本效益的溶剂和催化剂,无需柱色谱分离产物,收率高至极好,反应介质和克数可重复使用。规模综合适用性。