反应详情

To a solution of 3-(pentafluoro-λ6-sulfanyl)aniline (13.46 g, 61.4 mmol) in DMF (123 ml) stirred in a 500 mL round-bottomed flask in an ice bath under a nitrogen atmosphere, NBS (12.02 g, 67.6 mmol) was added in one portion. The resulting mixture was stirred at room temperature for 4 hr. The reaction was worked up by the addition of H2O and extracted with EtOAc (2×100 mL). The combined organic layer was washed with H2O and brine. The organic layer was dried over MgSO4, filtered and evaporated. The residue was purified by CombiFlash Rf system eluted with a gradient up to 20% EtOAC/hexanes of EtOAc on a 120 g column to afford the desired 4-bromo-3-(pentafluoro-λ6-sulfanyl)aniline (11 g, 36.9 mmol, 60.1% yield).

1. extractionextracted with EtOAc (2×100 mL)
2. washThe combined organic layer was washed with H2O and brine
3. dry with materialThe organic layer was dried over MgSO4
4. filtrationfiltered
5. customevaporated
6. customThe residue was purified by CombiFlash Rf system
7. washeluted with a gradient up to 20% EtOAC/hexanes of EtOAc on a 120 g column