3-Aminopyridine → 2-Oxo-2,3-dihydro-1H-indole-5-sulfonic acid pyridin-3-ylamide
Reaction equation
Cl[S:2]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[NH:10][C:9](=[O:14])[CH2:8]2)(=[O:4])=[O:3].[NH2:15][C:16]1[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=1>N1C=CC=CC=1>[N:18]1[CH:19]=[CH:20][CH:21]=[C:16]([NH:15][S:2]([C:5]2[CH:6]=[C:7]3[C:11](=[CH:12][CH:13]=2)[NH:10][C:9](=[O:14])[CH2:8]3)(=[O:4])=[O:3])[CH:17]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A solution of 5-chlorosulfonyl-2-oxindole (3 g) and 3-aminopyridine (1.46 g) in pyridine (15 mL) was stirred at room temperature for overnight at which time the brown color solid was present. The precipitate was filtered, washed with ethanol and dried under vacuum to yield 1.4 g (38%) of 2-oxo-2,3-dihydro-1H-indole-5-sulfonic acid pyridin-3-ylamide.