4-[(1-Methylethyl)oxy]-3-(trifluoromethyl)benzoic acid (Preparation 39) (744 mg, 3.00 mmol), HOBT (446 mg, 3.30 mmol) and EDC (630 mg, 3.30 mmol) were stirred in DMF (28 ml) under argon for 20 minutes. 1,1-dimethylethyl 7-[(hydroxyamino)(imino)methyl]-1,2,4,5-tetrahydro-3H-3-benzazepine-3-carboxylate (Preparation 41) (915 mg, 3.00 mmol) was added and the mixture stirred at room temperature for 2 hrs before it was heated to 80° C. for 20 hrs. The reaction mixture was partitioned between EtOAc and water and the organic layer washed with aqueous sodium bicarbonate before it was dried in the usual manner and evaporated. The residue was purified by Biotage Horizon, reverse phase cartridge, eluting with 5-100% acetonitrile in water to give the title compound (749 mg, 1.45 mmol). δH (d6DMSO, 400 MHz): 8.40 (1H, dd), 8.31 (1H, d), 7.89 (1H, br.s), 7.86 (1H, dd), 7.58 (1H, d), 7.37 (1H, d), 4.98 (1H, septet), 3.54-3.46 (4H, m), 3.00-2.92 (4H, m), 1.41 (9H, s), 1.36 (6H, d).
