反应详情

To a solution of methyl 2-(methylsulfonylamino)phenylacetate (2.00 kg) in dimethylformamide (10 l), under an atmosphere of nitrogen, is added 4-chlorobenzyl chloride (1.37 kg) all at once, followed by anhydrous potassium carbonate (1.18 kg). The mixture is heated at 75° and stirred for 4 hours, then cooled to room temperature overnight at which time it is poured into water (50 l). The resulting precipitate is dissolved in dichloromethane (4 l). The dichloromethane solution is washed with brine (500 ml), dried over anhydrous magnesium sulfate and filtered. The filtrate is evaporated in vacuo to give a solid which is air-dried overnight and vacuum-dried (0.3 mm Hg) at room temperature to yield methyl 2-[N-(4-chlorophenylmethyl)-methylsulfonylamino]phenylacetate mp 73°-75°.

1. temperatureThe mixture is heated at 75°
2. washThe dichloromethane solution is washed with brine (500 ml)
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationfiltered
5. customThe filtrate is evaporated in vacuo
6. customto give a solid which
7. customis air-dried overnight
8. customvacuum-dried (0.3 mm Hg) at room temperature