Three- component reactions of 1-(6-hydroxy-2-isopropenyl-1-benzofuran-yl)-1-ethanone,
aldehydes and malononitrile or ethyl cyanoacetate in the presence of nanoparticles of ZnO as catalyst are explained as
effective and green synthetic method for generating 9H- furo[2,3-f]chromenes in good yield.
Keywords: Aldehyde, chromene, ethyl cyanoacetate, malononitrile, petasites hybridus, 1-(6-hydroxy-2-isopropenyl-1-
benzofuran-yl)-1-ethanone, three- component reactions.
Rights & PermissionsPrintExport