A series of 2,3-dihydrofurocoumarins were prepared via a three-component reaction of aldehyde, pyridinium salt and 4-hydroxycoumarin in aqueous ethanol. This method avoids using excessive pyridine and trimethylamine, and has operational simplicity and avoids tedious column chromatography purification. Both aryl aldehydes and aliphatic aldehydes are applicable to this protocol.
通过醛、
吡啶鎓盐和
4-羟基
香豆素在
乙醇水溶液中的三组分反应制备了一系列
2,3-二氢呋喃香豆素。该方法避免了使用过量的
吡啶和
三甲胺,操作简单,避免了繁琐的柱层析纯化。芳醛和脂肪醛均适用于本协议。