Acetic Acid → 8-Methyl-1-oxothiochroman-4-one-7-carboxylic acid

Participants

Reaction Steps

7.0 g (31.5 mmol) of 8-methylthiochroman-4-one-7-carboxylic acid together with one spatula-tip full of sodium tungstate are introduced into 70 ml of acetic acid. 3.6 g (31.5 mmol) of a 30% strength hydrogen peroxide solution are added dropwise at 50° C. Stirring is continued for 3 hours. The reaction solution is then stirred into water. The product is extracted using ethyl acetate. The organic phase is dried and the solvent is removed. The product is purified by chromatography.

Provenance & Evidence