Oxidation of pyrazoles containing the 2-hydroxyethyl group on a NiO(OH) electrode in aqueous alkali |
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Authors: | B V Lyalin V A Petrosyan |
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Institution: | 1.Zelinskii Institute of Organic Chemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The electrooxidation of pyrazoles containing hydroxyethyl group bound with the pyrazole ring at its N and C atoms (1-(2-hydroxyethyl)pyrazole
and (4-(2-hydroxyethyl)pyrazole, respectively) in an undivided cell on a NiO(OH) electrode in aqueous alkali is studied. The
oxidation of 1-(2-hydroxyethyl)pyrazole is shown to result in the formation of pyrazole-1-acetic acid with a yield of 80.0%.
In the case of 4-(2-hydroxyethyl)pyrazole the process proceeds more exhaustively, leading to the formation of pyrazole-4-carboxylic
acid as the major product with a yield of 57.0%. The regularities of these processes are discussed. |
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