Polyacrylonitrile fiber with strongly acidic electrostatic microenvironment: Highly efficient and recyclable heterogeneous catalyst for the synthesis of heterocyclic compounds
- Resource Type
- Article
- Authors
- Jian Xiao; Gang Xu; Lu Wang; Pengyu Li; Wenqin Zhang; Ning Ma; Minli Tao
- Source
- Journal of Industrial and Engineering Chemistry, 77(0), pp.65-75 Sep, 2019
- Subject
- 화학공학
- Language
- English
- ISSN
- 1876-794X
1226-086X
Four categories of sulfonic acid functionalizedfiber catalysts with different surface microenvironmentswere synthesized by covalent grafting using polyacrylonitrilefiber (PANF) as the support. After the effectof acid structure on catalytic activity has been investigated by Friedlander reaction, PANEOSF was chosenfor the synthesis of quinolines and coumarin derivatives with high yields and extensive substrate scope(51 examples) in ethanol or water. The effect of electrostatic microenvironment and solvent has beendiscussed, and a “release-catch-release-catch” catalytic pattern was proposed accordingly. PANEOSF canbe easily recycled for 20 times without any decrease of catalytic activity.