反应详情

温度

100 °C

To a solution of phthalimide (4.4 g; 30 mmol) in anhydrous DMF (40 ml) cooled to 0° C. was added sodium hydride (1.29 g, 32 mmol, 60% in oil). The mixture was stirred at this temperature for 30 minutes before the addition of 1,2-difluoro-3-(2,2-dimethoxypropyl)-4-nitrobenzene (6 g, 23 mmol), (prepared as described for the starting material in Example 11). The reaction mixture was heated at 100° C. for 3 hours under argon. Upon cooling to ambient temperature, the reaction mixture was poured over ice/water (200 ml) and the formed precipitate was collected by filtration and washed with water and ether. The solid was purified by flash chromatography using methylene chloride/methanol (99/1). Evaporation of the solvent gave 2-(2,2-dimethoxypropyl)-3-fluoro-4-phthalimidonitrobenzene (5.6 g, 63%) as a yellow solid.

1. custom(prepared
2. temperatureUpon cooling to ambient temperature
3. filtrationthe formed precipitate was collected by filtration
4. washwashed with water and ether
5. customThe solid was purified by flash chromatography
6. customEvaporation of the solvent