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Citation: CAO Shao-Ting, FANG Dong, GONG Kai, LI Meng-Long, MAO Rong, LIU Zu-Liang. Reaction of Aromatic Aldehydes with 5,5-Dimethyl-1,3-cyclohexandione in Water Catalyzed by Functionalized Ionic Liquid[J]. Chinese Journal of Applied Chemistry, ;2009, 26(9): 1123-1125. shu

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

1.
Chemical Engineering School, Nanjing University of Science & Technology, Nanjing 210094

Corresponding author: LIU Zu-Liang,
Received Date: 20 August 2008
Available Online: 16 November 2008

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 Brønsted 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.
- ionic liquids,
- aromatic aldehyde,
- dimethylcyclohexandione,
- environment-friendly reaction
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