17764-92-0

1-(4-Bromo-2-hydroxyphenyl)-1-propanone is a useful compound for preparation of indazoles.

Preparation by Friedel–Crafts acylation of m-bromophenol with propionyl chloride in the presence of aluminium chloride in refluxing ethylene dichloride for 2 h (78%)
Also obtained by Fries rearrangement of 3-bromophenyl propionate in the presence of aluminium chloride at 50° for 3 h (47%).