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Elbs persulfate oxidation
The Elbs persulfate oxidation is the organic reaction of phenols with alkaline potassium persulfate to form para-diphenols.
Additional recommended knowledge
Several review have been published.
A reaction mechanism has been postulated accounting for the observed para substitution featuring the tautomeric para carbanion of the starting phenolate ion:
which gives a nucleophilic displacement on the peroxide oxygen of the peroxodisulfate (peroxydisulfate) ion. The intermediate sulfate group is then hydrolyzed to the alcohol.
The reaction is disadvantaged by low chemical yields with recovery of starting material and complete consumption of the persulfate. It is suggested that the phenol in many cases is a catalyst converting the persulfate into a sulfate.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Elbs_persulfate_oxidation". A list of authors is available in Wikipedia.|