Abstract
A preparative method for the synthesis of previously inaccessible 3-formyl-5-hydroxyindole derivatives by Vilsmeier formylation of 5-acetoxyindoles is proposed. 5-Hydroxyindole-3-carboxylic acid nitriles and their 4-dimethylamino-methyl derivatives were obtained from 3-formyl-5-hydroxyindoles through their oximes.
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