Autoxidation of 5,6-dihydroxyindole-2-carboxylic acid (1) in the presence of metal ions, e.g. Co2+, leads to a mixture of oligomers, the major of which has been isolated as the acetyl and methyl ester derivative and identified as 5,6,5′,6′-tetraacetoxy-2,2′-dicarbomethoxy-4,4′-biindolyl (2).
Isolation of a new intermediate in the oxidative conversion of 5,6-dihydroxyindole-2-carboxylic acid to melanin
M. D'ISCHIA;O. CRESCENZI;
1987
Abstract
Autoxidation of 5,6-dihydroxyindole-2-carboxylic acid (1) in the presence of metal ions, e.g. Co2+, leads to a mixture of oligomers, the major of which has been isolated as the acetyl and methyl ester derivative and identified as 5,6,5′,6′-tetraacetoxy-2,2′-dicarbomethoxy-4,4′-biindolyl (2).File in questo prodotto:
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