[CH3:1][C:2]1[CH:7]=[C:6]([C:8]([CH3:10])=[O:9])[CH:5]=[CH:4][C:3]=1[OH:11].Br[CH2:13][CH2:14][CH2:15][Cl:16].C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[Cl:16][CH2:15][CH2:14][CH2:13][O:11][C:3]1[CH:4]=[CH:5][C:6]([C:8](=[O:9])[CH3:10])=[CH:7][C:2]=1[CH3:1]A mixture of 25 g (0.166 mole) of 4-hydroxy-3-methylacetophenone, 45.8 g (0.33 mole) of 1-bromo-3-chloropropane and 69.1 g (0.5 mole) of anhydrous potassium carbonate in 500 ml of acetone was heated at reflux for 20 hr. The mixture was cooled, filtered, and the filtrate concentrated under reduced pressure to give an oil as residue. The oil was crystallized in petroluem ether. The solid was collected by filtration, washed with petroleum ether and dried to yield 35.8 g (95%) of an off-white powder. An analytical sample, m.p. 41.5°-42.5° C. was prepared from petroleum ether.
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