2-Chloro-4-cyclobutylpyrimidine (65 mg, 0.39 mmol), Intermediate 15 (100 mg, 0.39 mmol), and acetic acid (22 μL, 0.39 mmol) were combined in dioxane (1.9 mL) and the mixture was stirred at 120° C. for 3 h. The mixture was cooled to room temperature and directly purified by Combiflash chromatography on silica gel, eluting with ethyl acetate/isohexane to provide 66 mg (0.17 mmol, 44%) of 1-(5-{3-[(4-cyclobutylpyrimidin-2-yl)amino]-5-methylphenyl}-1,3-thiazol-2-yl)cyclobutanol. MS ESI: [M+H]+ m/z 393.2. 1H NMR (600 MHz, DMSO-d6) δ 9.56 (s, 1H), 8.33 (d, J=4.8, 1H), 8.12 (s, 1H), 7.95 (s, 1H), 7.48 (s, 1H), 7.05 (s, 1H), 6.68 (d, J=5.4, 1H), 6.46 (s, 1H), 3.53-3.50 (m, 1H), 2.52-2.46 (m, 2H), 2.33-2.22 (m, 9H), 1.99 (m, 1H), 1.87-1.83 (m, 3H). rhSYK activity=+++
