Abstract
1,2-Diphenylbenzo[b]cyclopenta[e]pyran was pyrylated with 2,6-diphenylpyrylium perchlorate. The structures of the singly and doubly charged 2,6-diphenyl-4-(1,2-di-phenylbenzo[b]cyclopenta[e]-3-pyrania)pyrylium cations are confirmed by data from the electronic absorption spectra. A radical mechanism for the pyrylation is proposed on the basis of the ESR spectrum.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 459–461, April, 1978.
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Porshnev, Y.N., Churkina, V.A. & Titov, V.V. Pyrylation of 1,2-diphenylbenzo[b]cyclopenta[e]pyran. Chem Heterocycl Compd 14, 373–375 (1978). https://doi.org/10.1007/BF00472146
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DOI: https://doi.org/10.1007/BF00472146