Cl.C(O)(=O)C.[CH3:6][O:7][C:8]1[CH:13]=[CH:12][C:11]([C:14]2[CH:19]=[CH:18][C:17]([C:20](=O)[CH:21]([CH3:24])[CH2:22][CH3:23])=[CH:16][CH:15]=2)=[CH:10][CH:9]=1>[Zn].[Hg]Cl.CCOCC.O.C1(C)C=CC=CC=1>[CH3:6][O:7][C:8]1[CH:9]=[CH:10][C:11]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][CH:21]([CH3:24])[CH2:22][CH3:23])=[CH:16][CH:15]=2)=[CH:12][CH:13]=113.6 g of zinc powder, 1.4 g of mercury chloride, 0.7 ml of conc. hydrochloric acid, and 20 ml of water were mixed with shaking for five minutes, and then the supernatant solution was flowed out. To the obtained zinc amalgam, 10 ml of water, 24 ml of conc. hydrochloric acid, 1 ml of acetic acid, 14 ml of toluene, and 38 m moles(10.2 g) of 4'-methoxy-4-(2-methylbutyryl)biphenyl were added, and then refluxed for 20 hours. In the mean time, 5 ml portions of conc. hydrochloric acid was successively added every five hours. The reaction solution was cooled to room temperature, then, after the addition of water, ether extracted. The extract was washed with water, dried, and concentrated, and then purified by column chromatography, to obtain 7.1 g of 4'-methoxy-4-(2-methylbutyl)biphenyl. (yield: 74%)
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