Di- and tri(2-pyron-6-yl)arenes

Condensation of di- and triacetylarenes with 1,1,1,3-tetrachloro-3-alkoxypropanes or ,-dichloroacrolein in acidic media gave a number of (dichloropentadienyl)- and tris (dichloropentadienyl)-substituted aryl ketones, which, in the case of acetic acid in the presence of phosphoric acid, are converted to the corresponding di- and tri(2-pyron-6-yl)arenes. It was observed that nitric acid has an oxidation effect on 2-pyrones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 897–901, July, 1977.