To a solution of 2-(4-(2-chlorophenyl)-4H-1,2,4-triazol-3-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-8-amine HCl salt (0.5 g, 1.16 mmol) in dried DCM (30 mL) was added DIPEA (0.61 mL, 3.48 mmol). The solution was stirred at 0° C. for 20 min and 2-chloro-acetyl chloride (0.2 g, 1.74 mmol) was added dropwise. The mixture was allowed to reach room temperature and stirred for a further 2 hours. The reaction solution was poured into ice water and extracted with EtOAc. The organics were combined, dried over Na2SO4 and evaporated in vacuum to afford the crude product (0.45 g, yield: 82%). 2-chloro-N-(2-(4-(2-chlorophenyl)-4H-1,2,4-triazol-3-yl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-8-yl)acetamide (0.2 g, 0.424 mmol) was mixed with HCl salt of NH(CH3)2 (0.172 g, 2.12 mmol) and NEt3 (0.3 mL, 2.12 mmol) in 15 mL of DCM. The solution was stirred at room temperature for 4 hours and quenched with ice water. Extraction with EtOAc and evaporation of the organics gave the crude product. It was purified by preparative TLC to afford 237 (40 mg, isolated yield: 20%). 1H NMR (DMSO-d6, 400 MHz): δ 9.81 (s, 1H), 8.81 (s, 1H), 7.79-7.38 (m, 7H), 6.55 (s, 1H), 4.16 (t, J=5.2 Hz, 2H), 3.02 (s, 3H), 2.96 (t, J=5.2 Hz, 2H), 2.21 (s, 6H). MS: (ESI+) 480.1
