[CH:1]([Mg]Cl)=[CH2:2].[O:5]([C:12]1[CH:13]=[C:14]([CH:17]=[CH:18][CH:19]=1)[CH:15]=[O:16])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[Cl-].[NH4+].Cl>O1CCCC1>[O:5]([C:12]1[CH:13]=[C:14]([CH:17]=[CH:18][CH:19]=1)[CH:15]([OH:16])[CH:1]=[CH2:2])[C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=130 ml of a 1.6 molar solution of vinyl-magnesium chloride in tetrahydrofuran are introduced into 100 ml of absolute tetrahydrofuran at 0° C. 9.8 g (0.05 mole) of 3-phenoxybenzaldehyde in 100 ml of absolute tetrahydrofuran are added dropwise whilst stirring and excluding moisture. The reaction mixture is stirred for 3 hours at 25° C. and is then cautiously decomposed by adding a cold saturated ammonium chloride solution and a few milliliters of 10% strength hydrochloric acid until the precipitate dissolves. The mixture is then extracted three times by shaking with ether and the combined ether extracts are washed with sodium bisulfite solution, sodium bicarbonate solution and water, dried over sodium sulfate and concentrated under reduced pressure.
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