Abstract
At boiling in trifluoroacetic acid derivatives of 3-cyanovinyl-3-p-nitrophenylaminoindole are cyclized into the corresponding pyrido[3,2-b]indoles as a results of activation of the CN group. Thermal cyclization of ethyl indolylacrylate occurs with participation of the more reactive ethoxycarbonyl group to give 3-cyanopyrido[3,2-b]indole.
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RF State Scientific Center “NIOPIK”, Moscow 103787, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 362–367, March, 2000.
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Ryabova, S.Y., Alekseeva, L.M. & Granik, B.G. 1H-pyrido[3,2-b]indoles. Synthesis and investigation of some their spectroscopic and chemical properties. Chem Heterocycl Compd 36, 301–306 (2000). https://doi.org/10.1007/BF02256867
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DOI: https://doi.org/10.1007/BF02256867