FC(F)(F)C(O)=O.CSC.C([O:18][C:19]1[CH:34]=[CH:33][CH:32]=[CH:31][C:20]=1[CH2:21][C:22]1[CH:27]=[CH:26][C:25]([CH2:28][C:29]#[N:30])=[CH:24][CH:23]=1)C1C=CC=CC=1>O>[OH:18][C:19]1[CH:34]=[CH:33][CH:32]=[CH:31][C:20]=1[CH2:21][C:22]1[CH:27]=[CH:26][C:25]([CH2:28][C:29]#[N:30])=[CH:24][CH:23]=1Trifluoroacetic acid (17 mL), water (1 mL) and dimethyl sulfide (2 mL) were added to [4-(2-benzyloxybenzyl)-phenyl]acetonitrile (0.41 g), and the mixture was stirred at room temperature overnight. The reaction mixture was concentrated under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: hexane/ethyl acetate=3/1) to give [4-(2-hydroxybenzyl)phenyl]acetonitrile (0.26 g).
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