To a solution of N-(4-aminophenyl)-5-((3,5-dichloropyridin-4-yl)thio)-4-nitrothiophene-2-carboxamide (0.2 g, 0.45 mmol) and 1H-benzo[d][1,2,3]triazole-1-carboximidamide HCl salt (0.18 g, 0.91 mmol) in acetonitrile (4 mL) was added triethylamine (0.13 mL, 0.91 mmol). After the addition, the resulting reaction mixture was heated at 60° C. for 24 hours. After this time, the reaction mixture was concentrated and purified by reverse phase HPLC to afford the titled product as a solid (20 mg, 9% yield). 1H NMR (400 MHz, d6-DMSO) δ: 10.66 (1H, s), 9.68 (1H, m), 9.01 (2H, m), 8.74 (1H, s), 7.73 (2H, m), 7.39 (4H, m), 7.25 (3H, m), 7.12 (2H, dd). MS m/z: 483.06, 485.06 [M+H]+.
