反应详情

To a solution of N-[4-chloro-2-(4-fluoro-benzoyl)-phenyl]-4-fluoro-benzamide (6.0 g, 16 mmol), prepared as described above for compound 1s, in MeOH (400 mL) was added 5N NaOH (50 mL) and the resulting solution was allowed to reflux for 16 h. The solution was cooled to room temperature and concentrated in vacuo. The aqueous portion was extracted with CH2Cl2 (2×100 mL). The combined organic portions were washed with H2O (3×50 mL), dried over MgSO4, filtered and evaporated in vacuo. The resulting residue was purified by column chromatography (silica gel, 5 to 25% EtOAc/hexanes) and recrystallized from MeOH to provide 1u (3.5 g, 83%) as a light yellow powder MS m/z=262 (M+H).

1. temperatureto reflux for 16 h
2. concentrationconcentrated in vacuo
3. extractionThe aqueous portion was extracted with CH2Cl2 (2×100 mL)
4. washThe combined organic portions were washed with H2O (3×50 mL)
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. customevaporated in vacuo
8. customThe resulting residue was purified by column chromatography (silica gel, 5 to 25% EtOAc/hexanes)
9. customrecrystallized from MeOH