[CH3:1][S:2](Cl)(=[O:4])=[O:3].[I:6][C:7]1[CH:8]=[C:9]([CH2:13][CH2:14][OH:15])[CH:10]=[CH:11][CH:12]=1.C(N(C(C)C)CC)(C)C>ClCCl.[Cl-].[NH4+]>[CH3:1][S:2]([O:15][CH2:14][CH2:13][C:9]1[CH:10]=[CH:11][CH:12]=[C:7]([I:6])[CH:8]=1)(=[O:4])=[O:3]Methanesulfonyl chloride (1.5 mL, 1.2 eq.) was added dropwise to a stirred solution of 2-(3-iodophenyl)ethanol (3.6 g) in dichloromethane (100 mL) and diisopropylethylamine (3.8 mL, 1.5 equiv.) at 0° C. The solution was warmed to room temperature and stirred for 18 h. The reaction mixture was diluted with aqueous ammonium chloride solution and extracted with dichloromethane. The organic layers were combined, washed with aqueous sodium hydrogencarbonate solution, brine, dried over sodium sulfate and concentrated under reduced pressure. The crude was purified using column chromatography (SiO2 cartridge) using DCM-cyclohexane (70:30) to afford the title compound (3.2 g, 45% yield).
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