Hydrogen Bromide → Phenol, 4-(4-(methylsulfonyl)phenoxy)-

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A solution of 37.3 g of 4-(4-(methylsulfonyl)phenoxy)-1-methoxybenzene (Example 18), 41 ml of 48% aqueous hydrogen bromide and 185 ml of glacial acetic acid was heated at reflux under nitrogen for 21 hrs. The reaction mixture was cooled and the solvent removed in vacuo. The product was collected by filtration, washed well with water and dried, which gave 35.0 g (98.9% yield) of the product. Recrystallization from aqueous ethanol gave purified 4-(4-(methylsulfonyl)phenoxy)phenol, mp 129°-130° C.

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