Boron tribromide → 4-((5-Bromo-2-chlorophenyl)methyl)phenol

Participants

Reaction Conditions

Reaction Steps

At −78° C., to a stirred solution of 4-bromo-1-chloro-2-(4-ethoxybenzyl)benzene (8.47 g, 0.026 mol) (according to the synthesis procedure in the reference: Journal of Medicinal Chemistry, 2008, 51, 1145-1149) in dichloromethane (250 mL) was added slowly a solution of tribromoborane in dichloromethane (8 mL, 4 M) in drops, the mixture was stirred at −78° C. for further 30 minutes and then 1 hour at room temperature. Saturated aqueous sodium bicarbonate (200 mL) was added dropwise, the mixture was extracted for 3 times with ethyl acetate. The organic phases were combined and washed with saturated brine for one time, dried over anhydrous sodium sulfate. The solvent was evaporated under vacuum. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 10:1) to afford the target compound.

Provenance & Evidence