[CH3:1][NH:2][CH3:3].C1COCC1.CCN(C(C)C)C(C)C.[Cl:18][C:19]1[CH:20]=[C:21]([S:26](Cl)(=[O:28])=[O:27])[CH:22]=[CH:23][C:24]=1[F:25].Cl>C(Cl)Cl.O>[Cl:18][C:19]1[CH:20]=[C:21]([S:26]([N:2]([CH3:3])[CH3:1])(=[O:27])=[O:28])[CH:22]=[CH:23][C:24]=1[F:25]A solution of 2M dimethylamine in THF (5.9 mL, 12 mmol) was diluted with DCM (25 mL) and cooled to 0° C. DIPEA (2.8 mL) was added, followed by and 3-chloro-4-fluorobenzenesulfonyl chloride (2.5 g, 11 mmol) in DCM (25 mL). The resulting mixture was allowed to warm to rt and stirred for 3 hours. Water (5 mL) and 1M hydrochloric acid (16 mL) was added. The organic phase was separated and evaporated under reduced pressure to afford the title compound (2.4 g, 94%).
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