Chin. J. Org. Chem. ›› 2013, Vol. 33 ›› Issue (08): 1715-1719.DOI: 10.6023/cjoc201301049 Previous Articles     Next Articles

Articles

碱性聚合离子液体用于Claisen-Schmidt缩合反应的研究

宋彦磊, 王新承, 黄崇品, 梁凤兵, 毓志超, 陈标华   

  1. 北京化工大学化工资源有效利用国家重点实验室 北京 100029
  • 收稿日期:2013-01-21 修回日期:2013-04-03 发布日期:2013-04-24
  • 通讯作者: 黄崇品 E-mail:huangcp@mail.buct.edu.cn
  • 基金资助:

    国家自然科学基金(No. 20806007)和国家重点基础研究发展计划(No. 2010CB226902)资助项目.

Claisen-Schmidt Condensation Catalyzed by Alkaline Poly(ionic liquid)

Song Yanlei, Wang Xincheng, Huang Chongpin, Liang Fengbing, Yu Zhichao, Chen Biaohua   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029
  • Received:2013-01-21 Revised:2013-04-03 Published:2013-04-24
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 20806007) and the National Basic Research Program of China (No. 2010CB226902).

Poly(iminazole-epichlorohydri) ionic liquid was synthesized and basic poly(ionic liquid) was prepared by alkali exchange and was characterized by FT-IR, NMR, GFC, potentiometric titration methods. It turns out that the poly(ionic liquid) has perfect degree of polymerization and very concentrated relative molecular weight distribution, and the exchange ratio of hydroxyl ion can be over 95%. Claisen-Schmidt condensation reaction was efficiently catalyzed by the poly(ionic liquid). For example, taking the condesation of aldehyde and ketone (aldehyde:ketone=1:4) in 2.5 mol/L aldehyde solution with 2% (weight) catalyst at 25℃ for 10 h, the yield can reached 99%. Ultrasonic waves can enhance the reaction with a yield of 90% in 4 h. After recycling use of the catalyst for 5 times, the yield still did not less than 90%. The catalytic activity of the catalyst is higher in low addition, and catalyst could be reused well.

Key words: alkaline poly(ionic liquid), Claisen-Schmidt condensation, catalysis