反应详情

A solution of N-(3-fluorophenyl)acetamide (20.0, 0.13 mol) in chlorosulfonic acid (150 mL) was heated to 75° C. for 1 hr. The solution was allowed to cool to room temperature and was poured over ice. The resulting slurry was extracted with dichloromethane. The combined organic extracts were dried over magnesium sulfate, filtered and evaporated to yield 15.5 g (47%) of 4-acetylamino-2-fluorobenzenesulfonyl chloride as a paste. The crude material was used in the subsequent step without further purification.

1. additionwas poured over ice
2. extractionThe resulting slurry was extracted with dichloromethane
3. dry with materialThe combined organic extracts were dried over magnesium sulfate
4. filtrationfiltered
5. customevaporated