[N+:1]([C:4]1[CH:5]=[CH:6][CH:7]=[C:8]2[C:13]=1[NH:12][C:11](=[O:14])[CH:10]=[CH:9]2)([O-:3])=[O:2].[C:15]([O-])([O-])=O.[Cs+].[Cs+].IC.O>CN(C=O)C>[CH3:15][O:14][C:11]1[CH:10]=[CH:9][C:8]2[C:13](=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=[CH:6][CH:7]=2)[N:12]=1To a stirred solution of 1,2-dihydro-8-nitroquinolin-2-one, as described above in Step C, (2.55 g, 13.41 mmol) in DMF (80 mL) were added Cs2CO3 (13.11 g, 40.23 mmol) and iodomethane (1.37 mL, 14.75 mmol) and the mixture was stirred vigorously for 2.5 hours. The reaction mixture was poured into water at 0° C. and the solid was isolated by filtration. The resulting solid was dried in vacuo, to yield the above-titled compound.
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