反应详情

温度

75 °C

A solution of Pd(OAc)2 (19 mg, 0.085 mmol) and butyl di-1-adamantyl phosphine (61 mg, 0.18 mmol) in THF (12.8 mL) was stirred for 15 min. Intermediate 10 (755 mg, 1.70 mmol), 5-bromo-1,3-thiazole (760 μL, 8.50 mmol), potassium fluoride (296 mg, 5.10 mmol), and water (4.25 mL) were then added, and the mixture was heated to 75° C. overnight. After cooling to rt, the mixture was diluted with 100 mL EtOAc and washed with 100 mL brine. A bright yellow solid remained undissolved on the walls of the separatory funnel, which was thus rinsed with 100 mL THF. The combined organic extracts were dried (Na2SO4) and concentrated in vacuo. Purification by Chromatography on silica gel (40 g; dry load; 100:0 to 50:50 hexanes:EtOAc over 25 minutes) provided N-[3-bromo-5-(1,3-thiazol-5-yl)phenyl]-4-(trifluoromethyl)pyrimidin-2-amine (449 mg, 1.12 mmol, 66%) as an off-white solid. MS APCI: [M+H]+ m/z 403.0. 1H NMR (400 MHz, (CD3)2CO): δ 9.46 (s, 1H); 9.03 (s, 1H); 8.89 (d, J=4.9 Hz, 1H); 8.32-8.26 (m, 2H); 8.16 (s, 1H); 7.59 (s, 1H); 7.33 (d, J=4.9 Hz, 1H). rhSYK activity=++.

1. temperatureAfter cooling to rt
2. washwashed with 100 mL brine
3. washwas thus rinsed with 100 mL THF
4. dry with materialThe combined organic extracts were dried (Na2SO4)
5. concentrationconcentrated in vacuo
6. customPurification by Chromatography on silica gel (40 g; dry load; 100:0 to 50:50 hexanes:EtOAc over 25 minutes)