Abstract
Vilsmeier formylation of 1,2-diphenylimidazo[1,2-a]benzimidazole leads to the 3-formyl derivative, while heating with acetic anhydride in sulfuric acid gives the 3-acetyl derivative. The nitration of this benzimidazole with potassium nitrate in sulfuric acid gives a mixture of mono-, di-, and trinitro derivatives. Bromination in chloroform leads to a mixture containing the mono- and dibromo derivatives. The structures of the compounds obtained were confirmed by their IR, PMR, and mass spectra.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1251–1254, September, 1981.
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Priimenko, B.A., Klyuev, N.A., Sapozhnikov, Y.M. et al. 1,2-Diphenylimidazo[1,2-a]benzimidazole in electrophilic substitution reactions. Chem Heterocycl Compd 17, 937–940 (1981). https://doi.org/10.1007/BF00505602
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DOI: https://doi.org/10.1007/BF00505602