1-(2-hydroxy-3,5-diiodophenyl)ethan-1-one

Preparation by iodination of 2-hydroxyacetophenone,
with iodine in aqueous sodium carbonate at r.t.(25%)
with iodine and iodic acid in ethanol at 35–40° for 1.5 h (75–85%)or at 60° (75%).