Process for the preparation of 5,6-dihydroxyindole and intermediate compounds

摘要

Process for the preparation of 5,6-dihydroxyindole, wherein the compound of formula: <IMAGE> (II) in which R' denotes a hydrogen atom or an optionally substituted benzyl radical, is subjected either to the action of hydrogen under pressure or to a hydrogen transfer operation, in a solvent medium and in the presence of a hydrogenation catalyst.