Ring-opening hydrolysis of spiro-epoxyoxindoles using a reusable sulfonic acid functionalized nitrogen rich carbon catalyst
作者:Parth Patel、Raj Kumar Tak、Bhavesh Parmar、Shilpa Dabas、Brijesh Patel、Eringathodi Suresh、Noor-ul H. Khan、Saravanan Subramanian
DOI:10.1039/d1ra01161h
日期:——
ring-opening hydrolysis reaction remains a great challenge with mineral acids and to an extent with homogeneous catalysts. In addition, even trace amounts of metal impurities in a bioactive product hinder the reaction progress. This has necessitated the development of robust and metal-free catalysts to offer an alternative sustainable route. We report a nitrogen-rich sulfonated carbon as a catalyst derived
对于无机酸以及一定程度的均相催化剂来说,控制开环水解反应的产物选择性仍然是一个巨大的挑战。此外,生物活性产物中即使含有微量金属杂质也会阻碍反应进程。这就需要开发坚固且不含金属的催化剂,以提供替代的可持续途径。我们报道了一种富含氮的磺化碳作为催化剂,该催化剂源自一种廉价的前体,用于合成螺羟吲哚衍生物的生物活性邻位二醇。该催化剂在温和的反应条件下,在底物中具有不同的电子和空间取代基,表现出广泛的通用性。热过滤测试证实酸部分没有浸出,并且催化剂可以重复使用四个周期并保留活性。