Abstract
Relatively difficult-to-oxidize 4-carboranylpyrans were obtained by the action of (phenyl-o-carboranyl)lithium on 2,6-disubstituted pyrylium salts. The conversion of the 4-carboranyl-pyrans to the corresponding 4-carboranylpyrylium salts is achieved by the action of a one-electron oxidizing agent-tris(p-bromophenyl)aminium hexachloroantimonate. The 4-(o-car-boranyl)pyrylium salts readily undergo one-electron electrochemical reduction. It is assumed that the first step in dehydrogenation of the pyrans is one-electron transfer.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1172–1175, September 1977.
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Drygina, O.V., Dorofeenko, G.N. & Okhlobystin, O.Y. Carboranylpyrans and carboranylpyrylium salts. Chem Heterocycl Compd 13, 942–944 (1977). https://doi.org/10.1007/BF00472442
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DOI: https://doi.org/10.1007/BF00472442