[N+:1]([C:4]1[CH:15]=[CH:14][C:7]2[C:8](=[O:13])OC(=O)[NH:11][C:6]=2[CH:5]=1)([O-:3])=[O:2].[CH3:16][NH2:17]>C1COCC1>[NH2:11][C:6]1[CH:5]=[C:4]([N+:1]([O-:3])=[O:2])[CH:15]=[CH:14][C:7]=1[C:8]([NH:17][CH3:16])=[O:13]7-Nitro-1H-3,1-benzoxazine-2,4-dione (1.14 g, 0.00549 mol) was dissolved in THF (50 mL, 0.6 mol). 2 M of Methylamine in THF (10 mL) was added, and a yellow solid formed immediately. The reaction mixture was concentrated under reduced pressure to afford a light orange solid.
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