Abstract
2,5-Dimethyl-3-D-furan was prepared for the first time. Its recyclization into the corresponding thiophene and selenophene was investigated. The possibility of β-C-protonation of the furan ring was confirmed by experimental and quantum chemical data.
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See [1] for Communication 4.
Scientific-Research Institute of Chemistry, N. G. Chernyshevskii Saratov State University, Saratov 410026. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1030–1034, August, 1997.
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Gubina, T.I., Labunskaya, V.I., Pankratov, A.N. et al. Study of the mechanism of recyclization of furans into thiophenes and selenophenes in conditions of acid catalysis. 5. Direction of protonation of furans. Chem Heterocycl Compd 33, 898–902 (1997). https://doi.org/10.1007/BF02253157
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DOI: https://doi.org/10.1007/BF02253157