反应详情

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

1. extractionthe product is extracted with ethyl acetate
2. customThe organic phase is dried
3. customthe solvent is removed
4. customThe product is purified by chromatography