反应详情

温度

60 °C

To a solution of 1-(2-bromo-ethyl)-4-fluoro-benzene (587 mg, 3.7 mmol) and pyrrolidine-2,5-dione (succinimide, 733.3 mg, 7.4 mmol) in dimethylformamide (15 ml) was added potassium carbonate (2.0 g, 14.8 mmol) and sodium iodide (277 mg, 1.9 mmol). The reaction mixture was warmed to 60° C. and kept at 60° C. overnight with stirring. The reaction mixture was cooled to room temperature and concentrated in vacuo. The concentrate was diluted with ethyl acetate and washed twice with a saturated sodium bicarbonate aqueous solution, twice with water, once with brine, and concentrated in vacuo. The residue was purified by silica gel chromatography (100% ethylacetate) to afford 1-[2-(4-fluoro-phenyl)-ethyl]-pyrrolidine-2,5-dione 309 (570 mg, 2.6 mmol, 70%) as a solid. 1H NMR (CDCl3) δ 7.14 (m, 2H), 6.94 (t, 2H), 3.68 (t, 2H), 2.84 (t, 2H), 2.63 (s, 4H).

1. temperatureThe reaction mixture was cooled to room temperature
2. concentrationconcentrated in vacuo
3. additionThe concentrate was diluted with ethyl acetate
4. washwashed twice with a saturated sodium bicarbonate aqueous solution, twice with water, once with brine
5. concentrationconcentrated in vacuo
6. customThe residue was purified by silica gel chromatography (100% ethylacetate)