[F:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=1.Br[CH2:10][CH2:11][CH2:12][CH2:13][O:14][CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C=O)C>[CH2:15]([O:14][CH2:13][CH2:12][CH2:11][CH2:10][O:8][C:5]1[CH:6]=[CH:7][C:2]([F:1])=[CH:3][CH:4]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1
4-Fluorophenol (500 mg) and benzyl 4-bromobutyl ether (1.1 g) were dissolved in DMF (20 mL), and potassium carbonate (1.0 g) was added thereto at room temperature, followed by stirring at 100° C. for 18 hours. The reaction mixture was allowed to cool to room temperature, and water was added thereto, followed by extraction with ethyl acetate. The organic layer was washed sequentially with water and saturated brine and dried over anhydrous sodium sulfate, and the solvent was evaporated. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=90/10) to obtain 1-[4-(benzyloxy)butoxy]-4-fluorobenzene (851 mg).
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