Ionic Liquid as Catalyst and Reaction Medium: A Simple and Efficient Procedure for Paal–Knorr Furan Synthesis
作者:Gangqiang Wang、Zhi Guan、Rongchang Tang、Yanhong He
DOI:10.1080/00397910902978049
日期:2010.1.14
The ionic liquid 1-butyl-3-methyl-imidazolium hydrogen sulfate, [bmim]HSO4, efficiently catalyzes Paal–Knorr furan synthesis without any organic solvent. A wide range of aliphatic and aromatic 1,4-diketones easily undergo condensations to form furan derivatives, providing a general and convenient procedure. The Paal–Knorr reaction of ester-substituted 1,4-diketones is first reported. The ionic liquid
离子液体 1-丁基-3-甲基-咪唑硫酸氢盐 [bmim]HSO4 无需任何有机溶剂即可有效催化 Paal-Knorr 呋喃合成。广泛的脂肪族和芳香族 1,4-二酮很容易缩合形成呋喃衍生物,提供了一个通用和方便的程序。首次报道了酯取代的 1,4-二酮的 Paal-Knorr 反应。离子液体可以回收并重新用于后续运行,而不会显着降低效率。