[CH3:1][N:2]([C:6]1[CH:11]=[CH:10][CH:9]=[C:8]([N+:12]([O-:14])=[O:13])[CH:7]=1)[CH2:3][CH2:4][OH:5].ClCCl.C(N(CC)CC)C.[S:25](Cl)([CH3:28])(=[O:27])=[O:26]>O>[CH3:28][S:25]([O:5][CH2:4][CH2:3][N:2]([CH3:1])[C:6]1[CH:11]=[CH:10][CH:9]=[C:8]([N+:12]([O-:14])=[O:13])[CH:7]=1)(=[O:27])=[O:26]To a mixture of 2-[methyl(3-nitrophenyl)amino]ethanol (780 mg) and dichloromethane (20 mL), triethylamine (0.66 mL) and mesyl chloride (0.37 mL) were added sequentially under ice cooling and stirred for 3 hours. Water was added to the reaction liquid, and the organic layer was separated and washed with saturated aqueous sodium chloride. After drying over anhydrous magnesium sulfate, the solvent was distilled off to give 2-[methyl(3-nitrophenyl)amino]ethyl methanesulfonate (1.0 g) as a yellow solid.
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