反应详情

BBr3 (3.71 mL, 3.71 mmol, 1 M in DCM) was added at 0° C. to a solution of 2-bromo-6-methoxyphenylamine (375 mg, 1.86 mmol) in DCM (10 mL). The reaction mixture was stirred under reflux for 2 hours and was quenched by the addition of MeOH followed by a saturated solution of NaHCO3. The aqueous phase was extracted with AcOEt. The resulting organic layer was washed with brine dried over MgSO4, filtered and evaporated. The crude residue was purified by flash chromatography (cyclohexane/AcOEt 7:3 to DCM) to yield 204 mg (1.08 mmol, 58%) of 2-amino-3-bromophenol as a solid.

1. temperatureunder reflux for 2 hours
2. customwas quenched by the addition of MeOH
3. extractionThe aqueous phase was extracted with AcOEt
4. washThe resulting organic layer was washed with brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. customevaporated
8. customThe crude residue was purified by flash chromatography (cyclohexane/AcOEt 7:3 to DCM)