Electrochemical process for the production of benzanthrone
AssigneeCiba-Geigy Corporation
InventorsJacques Bersier, Horst Jager, Hansrudolf Schwander
Life of this patent
Estimating the term…
Abstract
An electrochemical process for the production of benzanthrone by reaction of anthraquinone as, starting material, with glycerol, which process comprises reducing anthraquinone, which may additionally contain electronegative substituents, at the cathode in an electrolytic cell in acid medium, and simultaneously cyclizing the reduced semiquinone form with glycerol to produce the corresponding benzanthrone. The novel process affords numerous advantages compared with chemical reduction methods.
Claims8
An electrochemical process for the production of benzanthrone by reaction of anthraquinone, as starting material, with glycerol, which process comprises reducing anthraquinone, which may additionally contain electronegative substituents, to oxanthrone at the cathode in an electrolytic cell in acid medium, and simultaneously cyclising the reduced semiquinone form with glycerol to produce the corresponding benzanthrone.
Dependencies are inferred from the claim text.