反应详情

1.0 g (4.3 mmol) 4-bromo-3-nitroanisole is nitrated by dropwise addition of 1.0 ml of a mixture of 0.4 ml nitric acid (100%) and 0.6 ml concentrated sulfuric acid. Stirring is continued for 1 h. After that the reaction mixture is poured on water and extracted (3×) with ethyl acetate. The combined organic layers are washed with water and brine (2×), dried over MgSO4, filtered and concentrated in vacuo. The residue is purified by flash-chromatography on silica gel (hexane:EtOAc=1:1) to afford 630 mg of the title compound as yellow crystals.

1. additionAfter that the reaction mixture is poured on water
2. extractionextracted (3×) with ethyl acetate
3. washThe combined organic layers are washed with water and brine (2×)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue is purified by flash-chromatography on silica gel (hexane:EtOAc=1:1)