Abstract
Conditions were found which allow 2-alkyl-substituted imidazole-4,5-dicarboxylic acids to be synthesized in preparative quantities by the oxidation of 2-alkylbenzimidazoles with hydrogen peroxide. It was shown that optimal results can be obtained at the concentration of 2-alkylimidazole in sulfuric acid of 1 M and the hydrogen peroxide: 2-alkylbenzimidazole molar ratio of 11: 1. Oxidation under these conditions results in higher yields of the target 2-alkylimidazole-4,5-dicarboxylic acids, including those with a branched alkyl group.
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Original Russian Text © M.A. Brusina, Yu.A. Gubina, D.N. Nikolaev, S.M. Ramsh, L.B. Piotrovskii, 2018, published in Zhurnal Obshchei Khimii, 2018, Vol. 88, No. 5, pp. 729–733.
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Brusina, M.A., Gubina, Y.A., Nikolaev, D.N. et al. Influence of Oxidation Conditions on the Yield of 2-Substituted Imidazole-4,5-dicarboxylic Acids. Russ J Gen Chem 88, 874–878 (2018). https://doi.org/10.1134/S1070363218050055
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DOI: https://doi.org/10.1134/S1070363218050055