Highly efficient and green synthesis of spiro[indoline-3,9′-xanthene]trione and spiro[chromene-4,3′-indoline]-3-carbonitrile derivatives in water catalyzed by graphene oxide-supported dicationic ionic liquid
作者:Nipun Patel、Unnati Patel、Abhishek Dadhania
DOI:10.1007/s11164-021-04405-x
日期:2021.6
highly efficacious synthetic route has been developed for the synthesis of spiro[indoline-3,9′-xanthene]trione and spiro[chromene-4,3′-indoline]-3-carbonitrile derivatives using graphene oxide-supported dicationic ionic liquid (DIL@GO) as a heterogeneous catalyst in aqueous media. Targeted spiro[indoline-3,9′-xanthene]trione derivatives were synthesized via one-pot condensation of substituted isatins
在本文中,开发了一种温和且高效的合成路线,用于使用氧化石墨烯合成螺[吲哚啉-3,9'-吨]三酮和螺[chromene-4,3'-吲哚啉] -3-腈负载的阳离子型离子液体(DIL @ GO)作为水性介质中的非均相催化剂。通过取代的靛红与1,3-二酮化合物(1,3-环己二酮/二甲酮)和螺[色烯-4,3'的一锅缩合反应,合成了靶向的螺[吲哚啉-3,9'-x吨]三酮衍生物-二氢吲哚] -3-腈衍生物是通过取代的靛红,丙二腈和可烯丙基的CH活化化合物(2-羟基萘-1,4-二酮/二甲酮)的一锅反应合成的。DIL @ GO催化剂在所有测试的反应中均表现出出色的催化能力,并在较短的反应时间内获得了优异的最终产物分离产率。另外,催化剂的非均质性质有助于通过离心分离催化剂,并且其具有可保留活性的多达五个连续反应循环的可重复使用性使该方法更为有利且对环境无害。 图形摘要