[Cl:1][C:2]1[CH:7]=[C:6](Br)[CH:5]=[CH:4][C:3]=1[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[Mg].[CH:16](=[O:18])[CH3:17].[Cl-].[NH4+]>O1CCCC1.O>[CH3:17][CH:16]([OH:18])[C:6]1[CH:5]=[CH:4][C:3]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[C:2]([Cl:1])[CH:7]=1
2-Chloro-4-biphenylmagnesium bromide was prepared by known methods from 53.4 g of 2-chloro-4-bromobiphenyl and 5.0 g of magnesium turnings in tetrahydrofuran. A solution of 9.2 g of acetaldehyde in 100 ml of tetrahydrofuran was added dropwise to the cooled Grignard reagent solution. The reaction mixture was stirred at room temperature overnight. The reaction mixture then was cooled, treated successively with 165 ml of saturated aqueous ammonium chloride and 100 ml of water, and poured onto ice. The reaction mixture was extracted with diethyl ether. The diethyl ether extracts were combined, washed three times with water, and dried over anhydrous sodium sulfate. The diethyl ether was evaporated under reduced pressure and the liquid residue was vacuum distilled to give 28.6 g of α-methyl-3-chloro-4-phenylbenzyl alcohol, bp 145°-157°C/0.09 mm. The following elemental analysis was obtained:
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