A preparatively convenient method was developed for the synthesis of 1-aryl-1H-pyrazole-3,4-di-carboxylic acids based on the alkaline hydrolysis and oxidation of 1-aryl-4-formyl-1H-pyrazole-3-carboxylic esters with hydrogen peroxide in an aqueous medium.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 243-247, February, 2010.
*For Communication 5 see [1].
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Bratenko, M.K., Barus, M.M. & Vovk, M.V. Polyfunctional pyrazoles 6.* Convenient method for the synthesis of 1-aryl-1H-pyrazole-3,4-dicarboxylic acids. Chem Heterocycl Comp 46, 196–199 (2010). https://doi.org/10.1007/s10593-010-0491-4
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DOI: https://doi.org/10.1007/s10593-010-0491-4