O[N:2]1C2C=CC=CC=2N=N1.C(N(C(C)C)C(C)C)C.C(=O)([O-])[O-].[NH4+].[NH4+].[Br:26][C:27]1[CH:28]=[C:29]([CH2:33][C:34]([OH:36])=O)[CH:30]=[CH:31][CH:32]=1.Cl.CN(C)CCCN=C=NCC>>[Br:26][C:27]1[CH:28]=[C:29]([CH2:33][C:34]([NH2:2])=[O:36])[CH:30]=[CH:31][CH:32]=11-Hydroxybenzotriazole (HOBT, 13.82 g, 102.3 mmol), N-ethyldiisopropyl amine (Hunig's base, 13.22 g, 102.3 mmol) and ammonium carbonate (27.0 g, 279.0 mmol) were added to a solution of (3-bromophenyl)acetic acid (20.0 g, 93.0 mmol) in freshly dried and distilled tetrahydrofuran (80 mL) under a nitrogen atmosphere. The reaction mixture was stirred at room temperature for about 5 minutes and then cooled to 0° C. and stirred at the same temperature for about 1 hour. 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCLHCl, 19.61 g, 102.3 mmol) was added at 0° C. under nitrogen atmosphere. The reaction mixture was stirred at room temperature for about 12 hours. The solvent was evaporated under vacuum and water was added. A white solid was obtained which was filtered, washed with water and dried. Yield: 12.69 g.
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