[NH2:1][CH2:2][C:3]1[CH:4]=[C:5]([NH:9][C:10](=[O:16])[O:11][C:12]([CH3:15])([CH3:14])[CH3:13])[CH:6]=[CH:7][CH:8]=1.C(N(CC)CC)C.[N+:24]([C:27]1[CH:28]=[C:29]([CH:33]=[CH:34][CH:35]=1)[C:30](Cl)=[O:31])([O-:26])=[O:25].C(=O)(O)[O-].[Na+]>O1CCCC1>[N+:24]([C:27]1[CH:28]=[C:29]([CH:33]=[CH:34][CH:35]=1)[C:30]([NH:1][CH2:2][C:3]1[CH:4]=[C:5]([NH:9][C:10](=[O:16])[O:11][C:12]([CH3:13])([CH3:15])[CH3:14])[CH:6]=[CH:7][CH:8]=1)=[O:31])([O-:26])=[O:25]A solution of tert-butyl [3-(aminomethyl)phenyl]carbamate (2.0 g, 9 mmol) and triethylamine (1.3 mL, 9.5 mmol) in tetrahydrofuran (26 mL) at 0° C. was treated with a solution of 3-nitrobenzoyl chloride (1.8 g, 9.5 mmol) in tetrahydrofuran (7.3 mL) and stirred at 20° C. for 1 h. The reaction mixture was treated with saturated sodium bicarbonate and the aqueous layer was separated and extracted with ethyl acetate (3×15 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, and evaporated to give the desired product (3.5 g, 105%) as a crude off-white solid that was used without further purification. LCMS for C15H14N3O5 ([M-(t-Bu)+H]+H)+: m/z=316.0.
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