[CH3:1][O:2][C:3]1[CH:10]=[C:9]([O:11][CH3:12])[CH:8]=[CH:7][C:4]=1[CH2:5][NH2:6].N1C=CC=CC=1.[F:19][C:20]1[CH:21]=[C:22]([S:27](Cl)(=[O:29])=[O:28])[CH:23]=[CH:24][C:25]=1[F:26].Cl>ClCCl>[CH3:1][O:2][C:3]1[CH:10]=[C:9]([O:11][CH3:12])[CH:8]=[CH:7][C:4]=1[CH2:5][NH:6][S:27]([C:22]1[CH:23]=[CH:24][C:25]([F:26])=[C:20]([F:19])[CH:21]=1)(=[O:29])=[O:28]To a solution of 2,4-dimethoxybenzylamine (3.35 mL, 22.3 mmol) and pyridine (9.02 mL, 111.5 mmol) in dichloromethane (75 mL), 3,4-difluorobenzenesulfonyl chloride (3.04 mL, 22.3 mmol) was added with cooling on ice, and the reaction solution was stirred at room temperature for 16 hours. To the reaction solution, 2 M hydrochloric acid (100 mL) was added, and an organic layer was extracted. The thus obtained organic layer was dried over anhydrous sodium sulfate and vacuum concentrated to yield the title compound (7.66 g, 99%) as a colorless solid.
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