Thionyl Chloride → 2-Bromo-5-(trifluoromethyl)benzoyl chloride

Participants

Reaction Steps

A solution of 2-bromo-5-(trifluoromethyl)benzoic acid (10 g, 37.2 mmol) in thionyl chloride (44.2 g, 372 mmol) was heated at 90° C. for 2 hours. The reaction mixture was cooled to room temperature, concentrated under reduced pressure, and then azeotroped with toluene to afford 2-bromo-5-(trifluoromethyl)benzoyl chloride, which was used directly in the next step.

Provenance & Evidence