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New method of synthesis of δ-carbolines from 3-indolinone via pyrano[3,2-b]indoles

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

2-Arylidene-1-acetylindolin-3-ones were obtained from 1-acetylindolin-3-ones and p-substituted benzaldehydes or 4-pyridinecarboxaldehyde, by the action of malonodinitrile, andwere converted into 2-amino-4-aryl-5-acetyl-3-cyanopyrano[3,2-b]indoles. When heated with an aqueous-alcoholic solution of KOH, the latter compounds transform into 2-alkoxy-4-aryl-3-cyano-δ-carbolines. The possible paths of formation of δ-carbolines and pyrano[3,2-b]indoles are discussed.

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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 230–235, February, 1985.

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Velzheva, V.S., Nevskii, K.V. & Suvorov, N.N. New method of synthesis of δ-carbolines from 3-indolinone via pyrano[3,2-b]indoles. Chem Heterocycl Compd 21, 191–196 (1985). https://doi.org/10.1007/BF00504208

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  • DOI: https://doi.org/10.1007/BF00504208

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