Abstract
A method has been developed for obtaining indolo-α-pyrones by acylation of 3-indolylacetic acid and its N-methyl derivatives. Indolo-α-pyrones form indolo-α-pyridones by refluxing with ammonium acetate in acetic acid. Indolo[2,3-c]pyrylium salts were obtained by acylation of 4-methoxyand 3,4-dimethoxy-3-phenacylindoles.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 345–349, March, 1971.
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Dorofeenko, G.N., Korobkova, V.G. & Guzhina, E.A. Synthesis of indolo-α-pyrones, indolo-α-pyridones, and indolopyrylium salts. Chem Heterocycl Compd 7, 319–323 (1971). https://doi.org/10.1007/BF00944412
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DOI: https://doi.org/10.1007/BF00944412