New Syntheses of 3-Indolylglyoxal

Article abstract of DOI:10.1007/BF00512812

In a study of the possibilities of a simple method for the preparation of 3-indolylglyoxals two new methods for the synthesis of indolylglyoxal structures were proposed.The first method consists in oxidation of 3-hydroxyacetylindole with the dimethyl sulfoxide - oxalyl chloride complex, but for a number of reasons it is virtually inapplicable to the preparation of substituted indolylglyoxals.In the second case the readily synthesized 3-indolylglyoxyl chlorides are reduced to the corresponding aldehydes in good yields by means of trialkyltin hydrides.