反应详情

N-Iodosuccinimide (10 g, 45.0 mmol) and 4-fluoro-phenol (5.00 g, 40.0 mmol) were suspended in acetic acid (39 ml, 649.0 mmol) and stirred for 5 minutes before addition of concentrated sulphuric acid (0.79 ml, 13.4 mmol). The reaction mixture was stirred for 18 hours at room temperature before diluting with water (100 ml). The aqueous layer was extracted with dichloromethane (2×30 ml). The combined organic extracts were washed with sodium thiosulphate solution (20% aqueous, wt:v), water, dried over sodium sulfate, filtered and concentrated in vacuo. The crude residue was purified by column chromatography (silica gel) eluting with toluene to afford the title compound as an off white solid, 4.5 g, 40% yield.

1. extractionThe aqueous layer was extracted with dichloromethane (2×30 ml)
2. washThe combined organic extracts were washed with sodium thiosulphate solution (20% aqueous, wt:v), water
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe crude residue was purified by column chromatography (silica gel)
7. washeluting with toluene