应用化学 ›› 2009, Vol. 26 ›› Issue (09): 1123-1125.

• 研究简报 • 上一篇    下一篇

新型功能离子液体水相催化芳醛与5,5-二甲基-1,3-环己二酮的反应

曹少庭,方东,巩凯,李梦龙,毛蓉,刘祖亮*   

  1. (南京理工大学化工学院 南京  210094)
  • 收稿日期:2008-08-18 修回日期:2008-11-10 出版日期:2009-09-10 发布日期:2009-09-10
  • 通讯作者: 刘祖亮,男,研究员,博士生导师; E-mail:liuzuliang302@163.com; 研究方向:应用化学、绿色化工 、制药工程

Reaction of Aromatic Aldehydes with 5,5-Dimethyl-1,3 -cyclohexandione in Water Media Catalyzed by Novel Functionalized Ionic Liquid

CAO Shao-Ting, FANG Dong, GONG Kai, LI Meng-Long, MAO Rong, LIU Zu-Liang*   

  1. (Chemical Engineering School,Nanjing University of Science & Technology,Nanjing 210094)
  • Received:2008-08-18 Revised:2008-11-10 Published:2009-09-10 Online:2009-09-10

摘要:

以N,N,N′,N′-四甲基乙二胺、1,3-丙磺酸内酯为原料,经酸化合成了功能化离子液体N,N,N′,N′-四甲基N,N′-二磺丙基二硫酸氢盐(TSIL)。 TSIL离子液体兼具Bronsted 酸性官能团和季铵盐相转移催化剂的结构,能够实现水相中芳醛与5,5-二甲基-1,3-环己二酮反应,得到氢化氧杂蒽衍生物。 结果表明,合成的TSIL具有较高的催化活性,在水相中于100 ℃下回流2~3 h即可完成反应,产率可达80%~93%。 反应生成的取代氢化氧杂蒽与离子液体的水溶液不相溶,通过简单的过滤可实现产物与催化体系的分离,简化了分离过程,方法操作简便、环境友好、催化剂可回收并重复使用。

关键词: 离子液体, 芳醛, 二甲基环己二酮, 环境友好反应

Abstract:

A novel functionalized ionic liquid N,N,N′,N′-tetramethyl-N,N′-disulfopropylammonium hydrogen sulfate(TSIL) was prepared from tetramethylethylenediamine and 1,3-propanesultone. This ionic liquid has both Bronsted acidic functional group and quaternary ammonium salt group that is generally used as phase-transfer catalyst, which can be used as a novel catalyst for the condensation reaction of aromatic aldehydes with 5,5dimethyl-1,3-cyclohexandione in water. The TSIL shows a good catalytic activity and the reaction could be carried out at 100 ℃ for 2 to 3 hours in water to produce 1,8-dioxo-octahydroxanthenes in a yield of 80%~93%. The product was immiscible with catalyst/water and could be separated simply by filtration after the reaction. This method is manipulatively simple, environment-friendly and the catalyst is reusable.

Key words: Ionic liquids, aromatic aldehydes, dimethyl-cyclohexandione, environment-friendly reaction

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