Electrochemical oxidation of cycloalkenes to form alpha, omega-dicarboxylic acids and ketocarboxylic acids
AssigneeEvonik Operations GmbH
InventorsFrank Weinelt, Franz-Erich Baumann, Siegfried R. Waldvogel, Silja Hofmann, Joachim Nikl
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Abstract
A process produces unsubstituted or at least monosubstituted α,ω-dicarboxylic acids and ketocarboxylic acids by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkenes by electrochemical oxidation in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.
Claims48
A process for producing unsubstituted or at least monosubstituted α,ω-dicarboxylic acids or ketocarboxylic acids by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkenes, the process comprising:
- (a) providing at least one unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkene;
- (b) providing at least one organic nitrate salt;
- (c) electrochemically oxidizing the unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkene provided in (a) in the presence of the at least one organic nitrate salt provided in (b) in an electrolysis cell in a reaction medium in the presence of oxygen,
- wherein substituents of the monounsaturated or polyunsaturated cycloalkenes are each independently selected from the group consisting of methyl, phenyl and benzyl substituents, wherein the phenyl and benzyl substituents are themselves each unsubstituted or monosubstituted or polysubstituted with 1, 2 or 3 substituents, each independently selected from the group consisting of F, Cl, Br and NO2.
Dependencies are inferred from the claim text.