反应详情

Treat 1-iodo-2-nitro-4-fluoro-6-bromobenzene (5.0 g, 14.46 mmol) with tin (II) chloride dihydrate (12 g, 58 mmol) in refluxing ethanol (150 mL). Stir at reflux for 24 hours, pour into a mixture of ethyl acetate (200 mL) and saturated sodium hydrogen carbonate (500 mL). Filter and wash the filtrate with saturated sodium hydrogen carbonate (200 mL) and water (200 mL). Dry (MgSO4), evaporate the solvent in vacuo and purify by silica gel chromatography to give the title compound as an off-white solid (3.45 g, 76%).

1. temperatureat reflux for 24 hours
2. filtrationFilter
3. washwash the filtrate with saturated sodium hydrogen carbonate (200 mL) and water (200 mL)
4. dry with materialDry (MgSO4)
5. customevaporate the solvent in vacuo
6. custompurify by silica gel chromatography