化学学报 ›› 2002, Vol. 60 ›› Issue (9): 1571-1574. 上一篇    下一篇

研究论文

室温离子液体中乙酸钠和氯苄催化合成乙酸苄酯

顾彦龙;杨宏洲;邓友全   

  1. 中国科学院兰州化学物理研究所绿色化学中心,兰州(730000)
  • 出版日期:2002-09-15 发布日期:2002-09-15

Catalytic Synthesis of Benzyl Acetate from Sodium Acetate and Benzyl Chloride in Room Temperature Ionic Liquid

Gu Yanlong;Yang Hongzhou;Deng Youquan   

  1. Green Chemistry Center, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences,Lanzhou(730000)
  • Online:2002-09-15 Published:2002-09-15

在多种1,3-二烷基咪唑和烷基吡啶室温离子液体中考察了较温和条件下乙酸 钠和氯化苄作用合成乙酸苄酯反应。在反应温度下(60 ℃),熔融的三水合乙酸 钠与离子液体相混溶,氯苄同乙酸钠作用得到乙苄酯,它与四氟硼酸1-乙基-3-甲 基咪唑离子液体不溶而分层。反应结束后产物乙酸苄酯可直接倾析得到,乙酸苄酯 产率达到90%,纯度超过99%。此离子液体催化体系简化了产物分离,离子液体可以 重复使用。

关键词: 咪唑 P, 吡啶 P, 乙酸钠, 氯甲基苯, 乙酸苄酯, 催化反应

The synthesis of benzyl acetate by sodium acetate and benzyl chloride was investigated in various 1,3-dialkylimidazolium and alkylpyridium ionic liquids. 1-Alkyl-3-methylimidazolium tetrafluoroborate ([C_nMIm][BF_4]) ionic liquids were found to be an effective solvent and catalyst for the reaction. When the reaction was performed at 60 ℃, the molten sodium acetate was miscible with 1- ethyl-3-methylimidazolium tetrafluoroborate ionic liquid but the product benzyl acetate was not. Therefore, the products could be conveniently separated by decantation. The benzyl acetate yield was as high as 90% with >99% purity. The ionic liquid could be reused for several times and did not lose the catalytic activity.

Key words: GLYOXALINE P, PYRIDINE P, SODIUM ACETATE, CHLOROMETHYLBENZENE, benzyl acetate, CATALYTIC REACTION

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