To a disposable sealed tube was added 2-(2-amino-5-formyl-6-methylsulfanyl-pyrimidin-4-ylamino)-N-(3-trifluoromethyl-phenyl)-acetamide (100 mg, 0.25 mmol, 1.0 eq.), isopropanol (4.0 mL), and hydrazine monohydrate (0.048 mL, 0.96 mmol, 3.8 eq.). The tube was sealed and heated to 80° C. overnight. The reaction was then quenched with H2O (10 mL) and EtOAc (50 mL). The EtOAc layer washed with brine, dried with Na2SO4, and concentrated to give crude 2-(2-amino-5-hydrazonomethyl-6-methylsulfanyl-pyrimidin-4-ylamino)-N-(3-trifluoromethyl-phenyl)-acetamide as an oil. The crude product was then precipitated out with 3 mL water and 0.5 mL of ACN, filtered and rinsed with 2 mL of H2O to give pure 2-(2-amino-5-hydrazonomethyl-6-methylsulfanyl-pyrimidin-4-ylamino)-N-(3-trifluoromethyl-phenyl)-acetamide as a yellow solid (45.0 mg, 45%). LC/MSD (HP Series 1100 MSD): Expected MW: 399, Observed M+H, 400.1, Retention time: 1.43 min. ANALYTICAL HPLC: >90%, Retention time: 3.89 min (8 minute run). 1H-NMR (d6-DMSO): 10.42 (s, 1H), 9.15 (t, 1H), 8.15 (s, 1H), 8.05 (s, 1H), 7.80 (d, 1H), 7.58 (t, 1H), 7.42 (d, 1H), 6.45 (s, 2H), 5.25 (br s, 2H), 4.30 (d, 2H), 2.40 (s, 3H) ppm.
