A simple synthesis of 2-(alkylamino)-5-alkyl[(2-oxo-2H-chromen-3-yl)carbonyl]amino}-3,4-furandicarboxylates via a one-pot multi-component reaction is described. The reactive 1:1 zwitterionic intermediate generated from the addition of isocyanides to dialkyl acetylenedicarboxylates was trapped at room temperature by coumarin-3-carboxylic acids prepared in situ from a 2-hydroxy aromatic aldehyde and
描述了通过一锅多组分反应简单合成2-(烷基氨基)-5- 烷基[(2-oxo-2 H -chromen-3-基)羰基]氨基} -3,4-呋喃二甲酸酯的方法。 。在室温下,由2-羟基芳族醛和Meldrum酸原位制备的香豆素3-羧酸将由异氰酸酯加成到乙炔基二羧酸二烷基酯中生成的反应性1:1两性离子中间体被捕获,从而提供了好至极好的标题化合物产量。