[C:1](Cl)(Cl)=[S:2].[Br:5][C:6]1[CH:12]=[C:11]([O:13][CH3:14])[CH:10]=[C:9]([Br:15])[C:7]=1[NH2:8]>O1CCCC1.C(=O)([O-])O.[Na+]>[Br:5][C:6]1[CH:12]=[C:11]([O:13][CH3:14])[CH:10]=[C:9]([Br:15])[C:7]=1[N:8]=[C:1]=[S:2]Thiophosgene (1.52 mL, 20.5 mmol) was added dropwise to a stirred mixture of 2,6-dibromo-4-methoxyaniline (2.86 g, 10.2 mmol) in tetrahydrofuran (25 mL) and saturated aqueous sodium hydrogen carbonate (25 mL) at 0° C. The mixture was stirred at room temperature for 1 h, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give the title compound as a yellow solid (3.22 g, 9.97 mmol, 98%).
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