[Br:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][C:12]2[CH:13]=[C:14]([CH:18]=[CH:19][CH:20]=2)[C:15](O)=[O:16])(=[O:10])=[O:9])=[CH:4][CH:3]=1.C(Cl)(=O)C([Cl:24])=O.CN(C=O)C>C(Cl)Cl>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][C:12]2[CH:13]=[C:14]([CH:18]=[CH:19][CH:20]=2)[C:15]([Cl:24])=[O:16])(=[O:10])=[O:9])=[CH:4][CH:3]=1A suspension of 3-(4-bromophenylsulfonamido)benzoic acid (2.30 g, 6.46 mmol) in DCM (50 mL) was stirred and cooled under argon to 0° C. Oxalyl chloride (676 μL, 7.11 mmol) was then added dropwise via a syringe, followed by DMF (50 μL). The resulting solution was then stirred overnight, allowing the reaction mixture to warm room temperature. The solution was used without further purification.
Loading…