| abstract |
PROCESS FOR PREPARATION OF 5,6-DIHYDROXYINDOLE OR ITS 3-ALKYL DERIVATIVE, CHARACTERIZED BY THE FACT THAT THE COMPOUND OF FORMULA: (CF DRAWING IN BOPI) IN WHICH R DESIGNATES A HYDROGEN ATOM OR A RADICAL BENZYL POSSIBLE SUBSTITUTE, R DESIGNATES HYDROGEN OR AN ALKYL GROUP, 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. |