[Cl:1][C:2]1[C:3]([N+:18]([O-])=O)=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[N:7]([C@@H:13]([CH3:17])[C:14]([NH2:16])=[O:15])[CH:6]=[CH:5]2.C(O)C.[Cl-].[NH4+].O>[Fe]>[NH2:18][C:3]1[C:2]([Cl:1])=[CH:11][CH:10]=[C:9]2[C:4]=1[CH:5]=[CH:6][N:7]([C@@H:13]([CH3:17])[C:14]([NH2:16])=[O:15])[C:8]2=[O:12]A mixture of (S)-2-(6-chloro-5-nitro-1-oxoisoquinolin-2(1H)-yl)propanamide (201 mg, 0.000679 mol), ethanol (10 mL, 0.2 mol), ammonium chloride (363.03 mg, 0.0067868 mol) and water (10 mL, 0.6 mol) was heated at 85° C. Iron (152 mg, 0.00271 mol) was added in three portions, 2 minutes apart and the reaction was stirred at that temperature for 1 hour. The mixture was poured onto dichloromethane (150 mL) and the layers were separated. The organic layer was washed with brine, dried, and the solvent was removed under reduced pressure to afford the product as a light yellow solid.
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