Abstract
The reaction of γ-unsubstituted pyrylium salts with alkali-metal cyanides gives cyano- and carboxy-substituted pyrans and pyrylium salts, while the reaction with sodium sulfide gives dipyranyl sulfides. A phthalimide derivative of pyran is obtained from 2,6-diphenylpyrylium perchlorate and potassium phthalimide, while pyrylium cations react with zinc to give the corresponding dipyranyls.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1313–1316, October, 1972.
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Baranov, S.N., Dumbai, M.A. & Krivun, S.V. Reactions of pyrylium salts with nucleophilic agents. Chem Heterocycl Compd 8, 1185–1188 (1972). https://doi.org/10.1007/BF00475525
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DOI: https://doi.org/10.1007/BF00475525