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Heterocycles with a bridging nitrogen atom. 15. The novel recyclization of dipyrido[1,2-a:1′,2′-c]-imidazolium salts to pyrido[1,2-a]-benzimidazole-8-carboxaldehydes

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Abstract

A previously unknown recyclization of an 11-acyldipyrido[1,2-a:1′,2′-c]imidazolium cation to 8-formyl-9-methyl(aryl)pyrido[1,2-a]benzimidazoles has been discovered. The proposed reaction mechanism includes a selective opening of one of the pyridinium rings and the formation of a benzaldehyde fragment via condensation of the intermediate with the participation of the acyl group.

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Authors and Affiliations

  1. M. V. Lomonosov Moscow State University, Moscow, 119992, Russia

    E. V. Babaev & G. A. Tikhomirov

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  1. E. V. Babaev
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  2. G. A. Tikhomirov
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 135–139, January, 2005.

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Babaev, E.V., Tikhomirov, G.A. Heterocycles with a bridging nitrogen atom. 15. The novel recyclization of dipyrido[1,2-a:1′,2′-c]-imidazolium salts to pyrido[1,2-a]-benzimidazole-8-carboxaldehydes. Chem Heterocycl Compd 41, 119–123 (2005). https://doi.org/10.1007/s10593-005-0117-4

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  • DOI: https://doi.org/10.1007/s10593-005-0117-4

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