1-(3-bromo-2-hydroxy-5-methylphenyl)ethanone

Preparation by Fries rearrangement of 2-bromo-4- methyl-phenyl acetate,
with aluminium chloride without solvent at 110° or in refluxing nitrobenzene (90%)
with zinc chloride or boron trifluoride in nitrobenzene at 100° (80–85%)
with ferric chloride or stannic chloride in nitrobenzene at 100° (55–70%).