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Synthesis of a New Polyheterocyclic System — Pyrazolo[5′,1′:2,3]pyrimido[1,6-a]benzimidazole

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

Cyanoethylhydrazones of 2-aroylmethyl-1H-benzimidazoles undergo recyclization on reaction with trifluoroacetyl anhydride to give 3-aryl-1-cyanoethyl-5-(2-trfluoroacetaminoanilino)pyrazoles. The recyclization products may be cyclized with closing of the benzimidazole ring in two ways: with formation of 1-(5-pyrazolyl)benzimidazoles or 5,6-dihydroderivatives of a new polyheterocyclic system — pyrazolo[5′,1′: 2,3]pyrimido[1,6-a]benzimidazole.

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Authors and Affiliations

  1. Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev, 02094, Ukraine

    I. B. Dzvinchuk & M. O. Lozinskii

Authors
  1. I. B. Dzvinchuk
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  2. M. O. Lozinskii
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, 1685–1690, November, 2005.

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Dzvinchuk, I.B., Lozinskii, M.O. Synthesis of a New Polyheterocyclic System — Pyrazolo[5′,1′:2,3]pyrimido[1,6-a]benzimidazole. Chem Heterocycl Compd 41, 1419–1423 (2005). https://doi.org/10.1007/s10593-006-0012-7

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  • DOI: https://doi.org/10.1007/s10593-006-0012-7

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