C([O:4][C:5]1[CH:10]=[CH:9][C:8]([C:11](=[O:14])[CH2:12][Br:13])=[CH:7][C:6]=1[CH2:15][O:16]C(=O)C)(=O)C.Br.O>CO>[Br:13][CH2:12][C:11]([C:8]1[CH:9]=[CH:10][C:5]([OH:4])=[C:6]([CH2:15][OH:16])[CH:7]=1)=[O:14]2-Acetoxymethyl-4-bromoacetylphenyl acetate (18.6 g) was dissolved in 90 ml of methanol, 100 ml of 47% hydrobromic acid was added with stirring under ice-cooling, and the mixture was subjected to 16 hours of reaction at room temperature. Water was added to the reaction solution with stirring under ice-cooling, and the resulting precipitates were collected by filtration and washed with water and hexane to give 9.54 g of 2-bromo-4'-hydroxy-3'-hydroxymethylacetophenone having a melting point of 117 to 119° C.
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