反应详情

3-Chloropropylsulfonyl chloride 1 (16.8 g, 94.9 mmol), ethylamine hydrochloride (13.5 g, 200 mmol), and potassium carbonate (27.6 g, 200 mmol) were sequentially added to ethyl acetate (500 ml). After the addition of N-benzyltrimethylammonium chloride (about 200 mg) to the mixture, the resultant mixture was stirred for 2 hours at room temperature and dried over anhydrous sodium sulfate. The mixture was filtered through a small amount of silica gel and the filtrate was concentrated in vacuo to give 12 g (74%) of crude N-methyl-3-chloropropylsulfonamide (intermediate 3b) as a pale yellow oil.

1. dry with materialdried over anhydrous sodium sulfate
2. filtrationThe mixture was filtered through a small amount of silica gel
3. concentrationthe filtrate was concentrated in vacuo