反应详情

18.4 g (83.64 mmol) of 2-fluoro-4-bromonitrobenzene (Aldrich) are almost fully dissolved in 300 mL of anhydrous methanol. 19.9 mL (106.22 mmol) of a 30% solution of sodium methoxide in methanol are added dropwise and the mixture is stirred overnight at room temperature. The methanol is evaporated off under reduced pressure, the medium is taken up in ethyl acetate and water, and the aqueous phase is then acidified by adding aqueous 1N HCl. After separation of the phases by settling, the organic phase is washed with saturated aqueous NaCl, dried over Na2SO4, filtered and concentrated under vacuum. 17.4 g of the expected product are obtained in the form of a yellow solid. Yield=89.7%.

1. customThe methanol is evaporated off under reduced pressure
2. additionby adding aqueous 1N HCl
3. customAfter separation of the phases
4. washthe organic phase is washed with saturated aqueous NaCl
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under vacuum