Abstract
A method is proposed for the synthesis of unsymmetrical unsubstituted pyrylium salts by condensation of Β-chlorocinnamaldehydes with methyl and methylene ketones and Β-dicarbonyl compounds in the presence of HClO4 or Lewis acids. The probable scheme of the reaction is examined.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1031–1035, August, 1974.
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Dorofeenko, G.N., Pyshchev, A.I. Synthesis of pyrylium salts by condensation of Β-chlorocinnamaldehydes with carbonyl compounds. Chem Heterocycl Compd 10, 898–901 (1974). https://doi.org/10.1007/BF00487104
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DOI: https://doi.org/10.1007/BF00487104