[CH3:1][NH2:2].F[C:4]1[N:9]=[C:8]([S:10]([NH2:13])(=[O:12])=[O:11])[CH:7]=[CH:6][CH:5]=1>>[CH3:1][NH:2][C:4]1[N:9]=[C:8]([S:10]([NH2:13])(=[O:12])=[O:11])[CH:7]=[CH:6][CH:5]=1To 10 ml of condensed methylamine was added 1.86 g (10 mmol) of 6-fluoropyridine-2-sulfonamide. The mixture was allowed to reflux under a dry-ice condenser for 4 hr, then excess amine was allowed to evaporate overnight. The residue was crystallized with water to yield 1.64 g of tan solid, m.p. 124° C. to 26° C.
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