Boron tribromide → 2-Amino-5-bromo-4-chlorophenol

Participants

Reaction Steps

To a suspension of 4-bromo-3-chloro-6-methoxyaniline (28) (944 mg, 4 mmol) in 10 ml DCM was added 1 M BBr3 in DCM (8 ml, 8 mmol). The reaction mixture was stirred at r.t. for 2 h, which turned to a brown solution and back to a brown suspension. After quenched with aq. sodium bicarbonate solution, the mixture was extracted with EA. The org. phase was washed with brine, dried over sodium sulfate, concentrated to dryness to give 865 mg of 29 as a brown solid. Yield: 97.2%, purity>95%.

Provenance & Evidence