Pyrylium salts synthesis

Since 1,5-enediones are usually obtained via pyrylium salts, syntheses of the type found in Section B, 2, a have a rather theroetical interest, save for a few special syntheses. There exist several direct syntheses of l,5-enediones, e.g., from j8-chlorovinyl ketones and j8-diketones or j8-keto esters special pathways to 1,5-enediones have also been described, namely, oxidation with lead tetraacetate or with periodic acid of cyclopentene-l,2-diols. ... 

MI1 A. T. Balaban Pyrylium Salts, Syntheses, Reactions and Physical... 

Benzo[c]Pyrylium Salts Syntheses, Reactions, and Physical Properties... 

Balaban, A. T., Dinculescu, A., Dorofeenko, G. N., Fischer, G., Koblik, A. V., Pyrylium Salts Syntheses, Reactions and Physical Properties, S2. 

Bcnzo[/)]furan and derivatives, recent advances in chemistry of, Part 1, occurrence and synthesis, 18, 337 Benzo[c]furans, 26, 135 recent advances in the chemistry of, and related compounds, 73, 1 Benzofuroxans, 10, 1 29, 251 2//-l-Benzopyrans (chrom-3-enes), 18, 159 Bcnzofc] pyrylium salts syntheses, reactions, and physical properties, 50, 157 1,2-and 2,1-Benzothiazines and related compounds, 28, 73... 

Balaban AT, Dinculescu A, Dorofeenko GN, Fischer GW, Koblik AV, Mezheritskii W, Schroth W (1982) Pyrylium salts, Syntheses, reactions, and physical properties, Academic, New York. 

Pyrrolopyridines, 9, 27 Pyrylium salts syntheses, 10, 241 syntheses, reactions, and physical properties, S2... 

A. V. Koblik, V. V. Mezheritskii, and W. Schroth, Pyrylium salts. Syntheses, reactions and physical properties, in "Advances in Heterocyclic Chemistry" (A. R. Katritzky, ed.), Suppl. Vol. 2, Academic Press, New York (1982). 

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