Reactions of Derivatives of N-Aryl-2-methyl-3-ethoxycarbonyl-4,5-dihydroxy-6-bromoindoles

Article abstract of DOI:10.1007/BF00473453

Some 4,5-dihydroxyindoles, with an acetoacetic ester substituent at the 7 position were used to synthesize 7-acetonyl-4,5-dihydroxyindoles.Methylation of these compounds gave 4-hydroxy-5-methoxy- and 4,5-dimethoxyindoles.On reaction with hydroxylamine, these compounds were converted to the oximes.Oxidation of 4,5-dihydroxyindoles with nitric acid gave 4,5-indolequinones.