Boron trifluoride etherate → 4-Bromo-1-chloro-2-(4-ethoxy-benzyl)-benzene

Participants

Reaction Steps

At −20° C., BF3.Et2O (0.75 mL) was added slowly into a solution of (5-bromo-2-chlorophenyl)(4-ethoxyphenyl)methanone (2 g) and Et3SiH (2 mL) in dry DCM (5 mL) and CH3CN (10 mL), then the mixture was stirred at room temperature for overnight. 7M KOH was slowly added into the mixture, and then the mixture was extracted with DCM, the organic phases were combined, dried over Na2SO4 and concentrated to obtain the crude product. The crude product was purified by silica-gel column chromatography (PE/EA=10/1) to obtain 3 g of 4-bromo-1-chloro-2-(4-ethoxybenzyl)benzene.

Provenance & Evidence