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  

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

作　　者：曹少庭[1] 方东[1] 巩凯[1] 李梦龙[1] 毛蓉[1] 刘祖亮[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《应用化学》2009年第9期1123-1125,共3页Chinese Journal of Applied Chemistry

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Brφnsted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2～3h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。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 Brcnsted acidic functional group and quaternary ammonium salt group that is generally used as phasetransfer catalyst, which can be used as a novel catalyst for the condensation reaction of aromatic aldehydes with 5,5-dimethyl-1,3-eyclohexandione 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.

关 键 词：离子液体 芳醛 二甲基环己二酮 环境友好反应 

分 类 号：O643[理学—物理化学]