[CH2:1]([C:5]1[CH:10]=[CH:9][C:8]([CH:11](O)[CH3:12])=[CH:7][CH:6]=1)[CH:2]([CH3:4])[CH3:3].CS(C)=O>O.[N+](C1C=CC=C([N+]([O-])=O)C=1)([O-])=O>[CH2:1]([C:5]1[CH:6]=[CH:7][C:8]([CH:11]=[CH2:12])=[CH:9][CH:10]=1)[CH:2]([CH3:4])[CH3:3]To 6 g of α-(4-isobutylphenyl)ethyl alcohol were added 12 g of dimethyl sulfoxide and 0.1 g of m-dinitrobenzene as a polymerization inhibitor. The mixture was stirred at 160° C. for 8 hours. The resultant reaction liquor was cooled, diluted with water and then subjected to extraction with benzene. After the resulting organic layer was dried with magnesium sulfate, the solvent was distilled off. The residue thus obtained was distilled to give 4.2 g of 4-isobutylstyrene having the following physical properties.
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