C1[O:14][C:4]([CH3:13])([CH2:5][C:6]2[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][CH:7]=2)OC1.[OH-].[Na+].Br[CH2:18][CH2:19][CH2:20][OH:21]>O>[OH:21][CH2:20][CH2:19][CH2:18][O:12][C:9]1[CH:8]=[CH:7][C:6]([CH2:5][C:4](=[O:14])[CH3:13])=[CH:11][CH:10]=11-(4-Hydroxyphenyl)propan-2-one ethylene ketal (3.88 g) was added to a solution of sodium hydroxide (1.5 g) in water (30 ml) and the mixture was stirred at room temperature for 30 minutes. 1-Bromo-3-hydroxypropane (2.98 g) was added and the mixture was boiled under reflux with stirring for 11/2 hours. After cooling water (50 ml) was added, the mixture was extracted with ether, the extracts dried (MgSO4) and evaporated to give the title compound (3.94 g) as its ethylene ketal.
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