江汉大学学报(自然科学版) ›› 2012, Vol. 40 ›› Issue (5): 37-40.

• 化学 • 上一篇    下一篇

壳聚糖催化合成香豆素-3-羧酸乙酯

彭望明   

  1. 江汉大学化学与环境工程学院,湖北武汉430056
  • 收稿日期:2012-08-31 出版日期:2012-10-20 发布日期:2013-11-07
  • 作者简介:彭望明(1965—),男,副教授,研究方向:应用化学。

Synthesis of Coumarins -3- ethyl—Earboxylate Catalyzed with Chitosan

PENG Wang-ming   

  1. School of Chemistry and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China
  • Received:2012-08-31 Online:2012-10-20 Published:2013-11-07

摘要: 以壳聚糖为催化剂,以无水乙醇为溶剂,通过水杨醛与丙二酸二乙酯的Knoevenagel缩合反应合成香豆素-3-羧酸乙酯。对影响香豆素-3-羧酸乙酯产率的因素如反应物物质的量比、反应时间、催化剂用量、溶剂用量、反应温度等进行了研究。结果表明丙二酸二乙酯0.06mol、水杨醛0.05mol、反应时间120min、壳聚糖3.0g、无水乙醇10.0mL、反应温度70℃时,香豆素-3-羧酸乙酯的产率可达87%。催化剂催化效率高,对环境友好,可重复使用。

关键词: 香豆素-3-羧酸乙酯, 水杨醛, 丙二酸二乙酯, 壳聚糖, 合成, 产率

Abstract: Coumarin-3- ethyl—carboxylate was synthesized with salicylaldehyde and diethylmalonate by using absolute alcohol as solvent and chitosan as catalyst. Some factors that influnced the yield of coumarin-3- ethyl—carboxylate were studied. The results showed that the yield of coumarin-3- ethyl—carboxylate was up to 87% when diethylmalonate was 0.06 mol, salicylaldehyde was 0.05 mol, chitosan was 3.0 g, the reaction time was 120 min, and absolute alcohol was 10 mL, the temperature was 70 ℃.

Key words: Coumarin-3- ethyl—carboxylate, salicylaldehyde, diethylmalonate, chitosan, synthesis, yield

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