反应详情

温度

75 °C

A stirred solution of 2-Chloro-5-(2-oxo-propyl)-benzenesulphonyl chloride (prepared as described in Example 174a) (20.0 g, 74.9 mmol) in dioxane (300 ml) at room temperature is treated with a solution of sodium sulphite (18.9 g, 150 mmol) and sodium hydrogen carbonate (12.6 g, 150 mmol) in water (200 ml). The reaction mixture is heated to 75° C. for 10 minutes and then allowed to cool to room temperature. The solvent is removed in vacuo and the residue dissolved in DMF (200 ml). The solution is stirred at room temperature and treated with iodomethane (21.2 g, 150 mmol). After stirring for 20 minutes, the reaction mixture is diluted with water (1000 ml) and extracted with ethyl acetate (3×250 ml). The combined organic layers are washed with water (2×200 ml), brine (100 ml), dried over MgSO4 and concentrated in vacuo to yield the titled compound.

1. temperatureto cool to room temperature
2. customThe solvent is removed in vacuo
3. dissolutionthe residue dissolved in DMF (200 ml)
4. stirringAfter stirring for 20 minutes
5. extractionextracted with ethyl acetate (3×250 ml)
6. washThe combined organic layers are washed with water (2×200 ml), brine (100 ml)
7. dry with materialdried over MgSO4
8. concentrationconcentrated in vacuo