[NH2:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[CH:4][C:3]=1[N+:11]([O-:13])=[O:12].C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.[CH3:35][C:36]1[CH:37]=[C:38]([NH2:43])[CH:39]=[CH:40][C:41]=1[CH3:42].CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O.O>[NH2:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([NH:43][C:38]2[CH:39]=[CH:40][C:41]([CH3:42])=[C:36]([CH3:35])[CH:37]=2)=[O:8])=[CH:4][C:3]=1[N+:11]([O-:13])=[O:12]To a solution of 4-amino-3-nitrobenzoic acid (1.82 g) in DMF (20 mL) was added HOBT (1.49 g) and EDCI (2.1 g). After stirring at room temperature for 10 min, 3,4-dimethylphenylamine (1.2 g) and DIPEA (5.3 mL) were added. The solution was stirred at room temperature for 18 h then the mixture was partioned between water and EtOAc The aqueous layer was extracted with EtOAc. The combined organic layers were washed with water, brine, dried, filtered and concentrated. The residue was purified by recrystallization from EtOAc and gave 4-amino-N-(3,4-dimethylphenyl)-3-nitrobenzamide as a yellow solid. MS (ESI)m/z 286 (M+H).
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