Electrogenemtion of Mn(III) in an undivided cell

Wagenknecht, J. H.; Coleman, James P.; Hallcher, R. C.; Rogers, Thomas E.; Wagner, Walter

doi:10.1007/bf00617527

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…It is a direct process with compartment separation that uses an aqueous sulfuric acid solution as the anolyte and an organic solvent with triethylammonium citrate as the supporting electrolyte in the catholyte . In past decades a great number of indirect electrochemical syntheses using mediator systems procedures for the reduction as well as oxidation reactions has appeared. − However, this useful tool has not been used in the reduction of phma.…”

Section: Introductionmentioning

confidence: 99%

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Indirect Electrochemical Synthesis of p-Hydroxyphenylacetic Acid

Inglés

Bonete

Expósito

et al. 2000

Ind. Eng. Chem. Res.

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p-Hydroxyphenylacetic acids are used in the synthesis of pharmaceutical drugs such as atenolol, betaxolol, or bufexamac. In this work, the indirect electrosynthesis of p-hydroxyphenylacetic acid is carried out using the redox system Cr(II)/Cr(III) as a mediator. Effluents that are not contaminated by chromium salts are obtained because the reductant, Cr(II), can be electrochemically regenerated. Voltammetric and galvanostatic studies were performed to find the best reaction conditions for the reduction of Cr(III) to Cr(II). An "ex-cell" procedure has been used for this process. Current efficiency, for Cr(II) synthesis, higher than 90% was reached using a bismuth-doped carbon-felt electrode. In the chemical reduction of the p-hydroxymandelic acid by electrochemically generated Cr(II), the presence of a cosolvent, reaction temperature, and molar Cr(II)/p-hydroxymandelic acid relationship was investigated. High material conversion and nearly quantitative yield was obtained at 90 °C using 2-propanol as the cosolvent.

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Section: Introductionmentioning

confidence: 99%

“…10 In past decades a great number of indirect electrochemical syntheses using mediator systems procedures for the reduction as well as oxidation reactions has appeared. [11][12][13][14][15][16][17] However, this useful tool has not been used in the reduction of phma.…”

Section: Introductionmentioning

confidence: 99%