催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (11): 1009-1012.

• 研究论文 • 上一篇    下一篇

Brønsted酸性离子液体催化异丁醛和叔丁醇缩合反应

沈江汉1,2,王华1,孙颖1,2,刘红超1,2,刘中民1   

  1. 1 中国科学院大连化学物理研究所, 辽宁大连 116023; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2007-11-25 出版日期:2007-11-25 发布日期:2011-10-13

Condensation of iso-Butanal and tert-Butyl Alcohol Catalyzed by Brønsted Acidic Ionic Liquids

SHEN Jianghan1,2, WANG Hua1, SUN Ying1,2, LIU Hongchao1,2, LIU Zhongmin1*   

  1. 1 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2007-11-25 Online:2007-11-25 Published:2011-10-13

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摘要： 考察了Brønsted酸性离子液体同时作为溶剂和催化剂催化异丁醛和叔丁醇缩合制备2,5-二甲基-2,4-己二烯的反应性能. 结果表明,Brønsted酸性离子液体具有良好的催化性能,反应后反应产物与离子液体自动分层易分离,离子液体经过真空干燥处理后可以作为溶剂和催化剂循环使用. 调变离子液体中的阳离子或阴离子的结构对催化性能有较大的影响.

关键词: 离子液体, 布朗斯台德酸, 异丁醛, 叔丁醇, Prins缩合, 5-二甲基-2, 4-己二烯

Abstract: Catalytic synthesis of2,5-dimethyl-2,4-hexadiene by Prins condensation of iso-butanal and tert-butyl alcohol was investigated using Brønsted acidic ionic liquids as both catalyst and solvent. It was found that all the ionic liquids were active for Prins condensation. After reaction, the upper organic phase could be easily separated from the ionic liquid by decantation. The ionic liquids could be reused in the next run by heat treatment under vacuum. Manipulating the structure of ionic liquids with respect to the organic cation or the organic/inorganic anion had great effects on the catalytic performance of the ionic liquids.

Key words: ionic liquid, Brø, nsted acid, iso-butanal, tert-butyl alcohol, Prins condensation, 5-dimethyl-2, 4-hexadiene