反应详情

To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (48.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3).

1. temperatureheated
2. temperatureto reflux for 1 hour
3. filtrationThe precipitated solids were collected by filtration
4. washwashed with water
5. customdried
6. dissolutionThe solids were dissolved in ethyl acetate
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate)