[CH3:1][S:2](Cl)(=[O:4])=[O:3].[Cl:6][C:7]1[CH:14]=[C:13]([C:15]([F:18])([F:17])[F:16])[CH:12]=[CH:11][C:8]=1[CH2:9][OH:10].C(N(CC)CC)C>ClCCl>[Cl:6][C:7]1[CH:14]=[C:13]([C:15]([F:16])([F:17])[F:18])[CH:12]=[CH:11][C:8]=1[CH2:9][O:10][S:2]([CH3:1])(=[O:4])=[O:3]Methanesulfonyl chloride (1.1 ml) was added dropwise to a solution of 2-chloro-4-(trifluoromethyl)benzyl alcohol (2.64 g) and anhydrous triethylamine (2.3 ml) in anhydrous dichloromethane (30 ml) in a nitrogen stream under ice-cooling and the mixture was stirred for 30 minutes under the same conditions. The reaction mixture was successively washed with water, aqueous sodium hydrogencarbonate, and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate. The filtrate was concentrated to give 2-chloro-1-((methanesulfonyloxy)methyl)-4-(trifluoromethyl)benzene as white crystals (3.62 g).
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