A highly efficient procedure for the synthesis of 2-substituted-2,3-dihydro-4-pyridone derivatives through the aza-Diels-Alder reaction under 'green chemistry' conditions is described. The reaction of Danishefsky's diene with imines has been found to perform better at room temperature in ionic liquids without an acid catalyst and organic solvent: the ionic liquids are recycled while their efficiency
描述了一种在“绿色
化学”条件下通过 aza-Diels-Alder 反应合成 2-取代-2,3-二氢-4-
吡啶酮衍
生物的高效程序。已经发现,Danishefsky 的二烯与
亚胺的反应在室温下在
离子液体中进行,没有酸催化剂和有机溶剂:
离子液体被回收,同时保留其效率。