[H-].[Na+].[F:3][C:4]1[CH:9]=[C:8]([N+:10]([O-:12])=[O:11])[CH:7]=[CH:6][C:5]=1[NH2:13].[Cl:14][C:15]1[C:20]([Cl:21])=[CH:19][CH:18]=[CH:17][C:16]=1[S:22](Cl)(=[O:24])=[O:23]>C1COCC1>[Cl:14][C:15]1[C:20]([Cl:21])=[CH:19][CH:18]=[CH:17][C:16]=1[S:22]([NH:13][C:5]1[CH:6]=[CH:7][C:8]([N+:10]([O-:12])=[O:11])=[CH:9][C:4]=1[F:3])(=[O:24])=[O:23]To NaH (60% dispersion in mineral oil) (0.734, 18.3 mmol) in THF (100 mL) at 0° C. was added dropwise a solution of 2-fluoro-4-nitrobenzenamine (2.20 g, 14.1 mmol) in THF (25 mL). The solution turned deep red in color and was stirred at 0° C. for 1 hour. A solution of 2,3-dichlorobenzene-1-sulfonyl chloride (3.80 g, 15.5 mmol) in THF (25 mL) was then added dropwise, at which point the reaction turned orange/yellow in color. The mixture was allowed to warm to room temperature and then was stirred for and additional 30 minutes. The reaction was quenched by addition of NH4Cl (aq., sat.), and then concentrated. The mixture was partitioned between water and ethyl acetate. The organics were dried with MgSO4, filtered, and concentrated to afford 2,3-dichloro-N-(2-fluoro-4-nitrophenyl)benzenesulfonamide.
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