反应详情

温度

0 °C

A solution of 2-chloro-2-(3-nitrophenyl)acetonitrile (Preparation 112, 103 mg, 0.524 mmol) and 1-hexyl-1H-pyrrole-2,5-dione (Preparation 56, 79 mg, 0.436 mmol) in N,N-dimethylformamide (2 ml) was added dropwise over 30 min to a stirred slurry of potassium carbonate (120 mg, 0.868 mmol) and sodium iodide (33 mg, 0.22 mmol) in N,N-dimethylformamide (4 ml) and water (0.1 ml) at 0° C. The reaction mixture was stirred for 30 min at 0° C. and then allowed to warm to room temperature. After stirring at room temperature for 2 h the mixture was diluted with water (10 ml) and extracted with ethyl acetate (3×5 ml). The combined organic phases were dried (MgSO4) and concentrated in vacuo to give a residue which was purified by column chromatography on silica gel eluting with hexane:ethyl acetate (5:1 and then 3:1). This gave the title compound as brown needles (47 mg, 32%).

1. temperatureto warm to room temperature
2. stirringAfter stirring at room temperature for 2 h the mixture
3. extractionextracted with ethyl acetate (3×5 ml)
4. dry with materialThe combined organic phases were dried (MgSO4)
5. concentrationconcentrated in vacuo
6. customto give a residue which
7. customwas purified by column chromatography on silica gel eluting with hexane:ethyl acetate (5:1