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Issue 0, 1982
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Preparation and reactions of pyrylium salts containing α-pyridyl groups

Abstract

The preparation of unsymmetrical 2,4,6-trisubstituted pyrylium salts from αβ-unsaturated ketones and methyl ketones is complicated by retro-aldol reactions leading to corresponding symmetrical pyrylium salts.

4,6-Diphenyl-2-(1H-pyridinium-2-yl)pyrylium (5a) and (5b) is prepared successfully by oxidation of the 1,5-dione from chalcone and 2-acetylpyridine. The transformation of pyrylium into pyridinium occurs easily with primary amines to 2-(2-pyridyl)pyridiniums whose various reactions are studied.

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J. Chem. Soc., Perkin Trans. 1, 1982, 125-130
Article type
Paper

Preparation and reactions of pyrylium salts containing α-pyridyl groups

A. R. Katritzky, E. M. Elisseou, R. C. Patel and B. Plau, J. Chem. Soc., Perkin Trans. 1, 1982, 125
DOI: 10.1039/P19820000125

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