Benezenederivatives from Pyranes: 5-Aminochromones and -flavones from 3-Acetyl-2,6-dimethyl-4H-pyran-4-one

Article abstract of DOI:10.1002/ardp.19893221004

3-Acetylpyrone 1 reacts with sec. amines to give the 2-acetylcyclohexanones 3, which can be dehydrated to yield the aminoacetophenones 7.Treatment of 3 or 7 with formamide acetal yields the enaminoketones 8, which can be converted to the 5-aminochromones