反应详情

Methoxylamine hydrochloride (0.95 g (11.4 mmol)) was suspended in pyridine (4.0 ml). To this, under cooling with ice and with stirring, 2-chlorobenzenesulfonyl chloride (2.11 g (10.0 mmol)) was added and the mixture was stirred under cooling with ice for one hour and at room temperature for one hour. Water (50.0 ml) was added to the reaction mixture and the resulting mixture was extracted with ethyl acetate. The extract was washed with water, dilute hydrochloric acid and a saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give 1.41 g (64%) of 2-chloro-N-methoxybenzenesulfonamide as pale yellow crystals.

1. temperatureTo this, under cooling with ice
2. stirringthe mixture was stirred
3. extractionthe resulting mixture was extracted with ethyl acetate
4. washThe extract was washed with water, dilute hydrochloric acid
5. dry with materiala saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure