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Quaternary 1-aminobenzimidazolium salts in reactions with β-dicarbonyl compounds. Formation of pyridazino[1,6-a]benzimidazolium cations and 1-arylpyrazoles

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Abstract

Pyridazino[1,6-a]benzimidazolium cations and 1-(o-methylaminoaryl)-4-acetylpyrazoles are formed simultaneously in approximately equal amounts in the reaction of excess acetylacetone with quaternary 1-aminobenzimidazolium salts in aqueous potassium carbonate solution. Mesoionic pyridazinobenzimidazoles and the corresponding 4-ethoxycarbonylpyrazoles were obtained with acetoacetic ester under similar conditions.

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Literature cited

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Authors and Affiliations

  1. Scientific-Research Institute of Physical and Organic Chemistry at Rostov State University, 344006, Rostov-on-Don

    V. V. Kuz'menko, T. A. Kuz'menko & A. M. Simonov

Authors
  1. V. V. Kuz'menko
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  2. T. A. Kuz'menko
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  3. A. M. Simonov
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Additional information

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 256–261, February, 1983.

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Kuz'menko, V.V., Kuz'menko, T.A. & Simonov, A.M. Quaternary 1-aminobenzimidazolium salts in reactions with β-dicarbonyl compounds. Formation of pyridazino[1,6-a]benzimidazolium cations and 1-arylpyrazoles. Chem Heterocycl Compd 19, 209–214 (1983). https://doi.org/10.1007/BF00506438

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  • DOI: https://doi.org/10.1007/BF00506438

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