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有机化学
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有机化学 ›› 2004, Vol. 24 ›› Issue (10): 1307-1309. 上一篇    下一篇

研究简报

离子液体超酸清洁催化苯的烷基化反应

陈治明*, 李存雄, 余大坤   

  1. 贵州师范大学化学系 贵阳 550001
  • 收稿日期:2003-12-23 修回日期:2004-03-30 接受日期:2004-05-26 发布日期:2022-09-20

Alkylation of Benzene in Ionic Liquids at Room Temperature

CHEN Zhi-Ming, LI Cun-Xiong, YU Da-Kun   

  1. Department of Chemistry, Guizhou Normal Univisty, Guiyang 550001
  • Received:2003-12-23 Revised:2004-03-30 Accepted:2004-05-26 Published:2022-09-20
  • Contact: * E-mail: czm000219@tom.com

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研究了在具有Lewis酸性的离子液体体系中进行的苯与烯烃及卤代烃的烷基化反应.以氯化1-甲基-3-乙基咪唑(MEIC)、氯化1-丁基吡啶(BPC)、氯化1-甲基-3-丁基咪唑(MBIC)及盐酸三甲胺(TMHC)季铵盐分别与AlCl3原位合成法制备离子液体催化体系.结果表明:以上各种离子液体均有很高的催化活性,反应转化率在较短的时间内达到100%.其中TMHC-AlCl3离子液体单烷基化选择性达98.6%.与AlCl3相比,催化活性显著提高,生成烷基化产物不溶于离子液体,因而易于分离,催化剂可重复使用.

关键词: 离子液体, 催化, 烷基化

Alkylation of benzene with alkene and/or chloroethane in Lewis acid-typeionic liquid catalysts, MEIC+AlCl3, MBIC+AlCl3, BPC+AlCl3 and TMHC+AlCl3, which in situ were prepared by the reaction of 1-methyl-3-ethylinidazole chloride (MEIC), 1-methyl-3-butylinidazole chloride (MBIC), 1-butylpyridium chloride(BPC) and trimethylamine hydrochloride (TMHC) with AlCl3, respectively, at room temperature has been investigated. The experimental result shows that the ionic liquid catalysts have higher catalytic activitythan that of peer AlCl3. The conversion can reach 100% in shorter time and the selectivity of TMHC-AlCl3 for monoalkylation of benzene can get 98.6%. Inaddition, the products are easily separated and the ionic liquid catalysts can be reused in the reaction.

Key words: ionic liquid, catalyst, alkylation