Chinese Journal of Organic Chemistry ›› 2004, Vol. 24 ›› Issue (7): 778-782. Previous Articles     Next Articles

高氯酸锂促进的固体酸催化酯化反应

王丽琼, 聂进*, 李小永, 张正波, 尹飞   

  1. 华中科技大学化学系 武汉 430074
  • 收稿日期:2003-06-23 修回日期:2004-01-07 接受日期:2004-02-09 发布日期:2022-09-20
  • 通讯作者: *E-mail: niejin@mail.hust.edu.cn

Enhancement Effect of Lithium Perchlorate on the Esterification Catalyzed by Yb(NTf2)3-Resin Catalyst

WANG, Li-Qiong, NIE, Jin*, LI, Xiao-Yong, ZHANG, Zheng-Bo, YIN, Fei   

  1. Department of Chemistry, Huazhong University of Technology and Science, Wuhan430074
  • Received:2003-06-23 Revised:2004-01-07 Accepted:2004-02-09 Published:2022-09-20

A novel solid acid catalyst was prepared by supporting Yb(NTf2)3 on NKC-9 resin and the new catalyst showed higher catalytic activity inesterification reactions compared with that of Yb(NTf2)3 as homogenous catalyst. When lithium perchlorate was added together with this solid acid catalyst, the esterification of benzoic acid with alcohols was significantly accelerated. The effects of reaction time, temperature, Yb(NTf2)3 loadings and LiClO4 dosage upon esterification were also investigated. Under the optimum conditions: supported resin 30 wt%, Yb(NTf2)3 0.8 mol%, LiClO4 58 mol%, acid∶alcohol (molar ratio)=1∶7 and reflux for 2 h, the yield of ethyl benzoate was over 99%. A tentative study of the LiClO4 acceleration effect was made through comparison of different catalysts.

Key words: Yb(NTf2)3, lithium perchlorate, solid acid, resin, esterification