高效可回收催化剂In(OTf)_3用于无溶剂条件下Pechmann缩合反应(英文)  

In(OTf)_3 as a powerful and recyclable catalyst for Pechmann condensation without solvent

作　　者：Bahador Karami Mahtab Kiani Mohsen Ahmad Hoseini 

机构地区：[1]Department of Chemistry,Yasouj University

出　　处：《催化学报》2014年第7期1206-1211,共6页

基　　金：Yasouj University for its support

摘　　要：In(OTf)3 plays the role of a Lewis acid catalyst in the Pechmann condensation of phenols with β-ketoesters under solvent-free conditions to give coumarin derivatives. This novel and inexpensive method has advantages such as short reaction time, excellent product yields, and avoids the use of organic solvents in agreement with green chemistry principles. Catalyst loadings can be as low as 1 mol% to give high yields of the corresponding coumarins at 80 °C. The catalyst can be recovered after the reaction, and reused with only a slight decrease in the yield.In（OTf）3 plays the role of a Lewis acid catalyst in the Pechmann condensation of phenols with β-ketoesters under solvent-free conditions to give coumarin derivatives. This novel and inexpensive method has advantages such as short reaction time, excellent product yields, and avoids the use of organic solvents in agreement with green chemistry principles. Catalyst loadings can be as low as 1 mol% to give high yields of the corresponding coumarins at 80 ℃. The catalyst can be recovered after the reaction, and reused with only a slight decrease in the yield.

关 键 词：路易斯酸催化剂 无溶剂条件 可回收 OTF 香豆素衍生物 冷凝 反应时间 产品产率 

分 类 号：O643.36[理学—物理化学]