Abstract
The interaction of 1-styryl-substituted 2-benzopyrylium salts with morpholine, methylamine, and malononitrile is highly stereoselective informing cis-3,4-dihydronaphthalenes; this can be taken as evidence that ortho-quinoid intermediates participate in these conversions.
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For Communication 41, see [1].
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1468–1475, November, 1991.
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Verin, S.V., Tosunyan, D.É. & Kuznetsov, E.V. 2-Benzopyrylium salts. 42. Ortho-quinoid intermediates in recyclization reactions of 2-benzopyrylium salts. Chem Heterocycl Compd 27, 1183–1189 (1991). https://doi.org/10.1007/BF00471741
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DOI: https://doi.org/10.1007/BF00471741