3-(5-bromo-2-(thiazolo[5,4-b]pyridin-2-ylamino)pyridin-3-ylthio)benzoic acid (0.080 g, 0.17 mmol) and N1,N1-dimethylethane-1,2-diamine (0.020 g, 0.23 mmol) were dissolved in DMF. 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.037 g, 0.19 mmol) and HOBT-H2O (0.029 g, 0.19 mmol) were then added. N,N-Diisopropylethylamine (0.034 mL, 0.19 mmol) was added last. The reaction was stirred at ambient temperature for 2 days. The material was diluted with water and the solid was filtered and recrystallized in EtOAc/hexanes to afford the title compound (0.030 g, 33% yield) as a white solid. 1H NMR (CDCl3) δ 2.25 (s, 6H), 2.50 (t, 2H), 3.46-3.51 (m; 2H), 6.91 (bs, 1H), 7.28-7.37 (m, 3H), 7.62 (d, 1H), 7.68 (s, 1H), 7.86 (d, 1H), 7.97 (s, 1H), 8.41 (d, 1H), 8.48 (s, 1H).
