• 文献标题:   Graphene Oxide Catalyzed Synthesis of Fused Chromeno Spiro Pyrrolidine Oxindoles via Tandem Decarboxylation and 1,3-Dipolar Cycloaddition
  • 文献类型:   Article
  • 作  者:   SINGH V, LAKSHMI SR, CHOWHAN LR
  • 作者关键词:   chromeno spirooxindole, azomethine ylide, heterogeneous catalysi, multi component reaction, 1, 3 dipolar cycloaddition, coumarin
  • 出版物名称:   FRONTIERS IN CHEMISTRY
  • ISSN:   2296-2646
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.3389/fchem.2021.759436
  • 出版年:   2022

▎ 摘  要

A short and efficient multicomponent sequence for synthesizing fused novel polyheterocyclic chromeno spiro-pyrrolidine oxindoles via 1,3-dipolar cycloaddition reaction mediated by reactive azomethine ylides catalyzed by the Graphene Oxide (GO) is reported herein. This approach was utilized for synthesizing fused polyheterocyclic spiro-pyrrolothiazole and spiro-pyrrole oxindoles with yields ranging from good to excellent. A heterogeneous GO catalyst with an ultra-low catalytic loading of 0.05 wt% could proficiently catalyze the reaction without the formation of any side products and can also be visualized by the formation of solid mass in the reaction flask. The methodology is green in nature and the products were isolated by simple filtration without the use of any chromatographic techniques.