反应详情

20 g (0.09 mol) of 8-methylthiochroman-4-one-7-carboxylic acid are dissolved in 100 ml of acetic acid. One spatula-tip full of sodium tungstate is added. 24.9 g (0.22 mol) of 30% strength hydrogen peroxide solution are then added dropwise at 50° C. Stirring is continued for one hour at RT. The reaction solution is then poured into water, during which process a precipitate is formed, which is filtered off with suction. The product is washed with water and then dried.

1. customis formed
2. filtrationwhich is filtered off with suction
3. washThe product is washed with water
4. customdried