反应详情

温度

90 °C

A flask was charged with (S)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(2-(trifluoromethyl)pyrrolidin-1-yl)pyrimidine (Intermediate 2, 5 g, 14.57 mmol), 6-bromopyridin-2-amine (3.03 g, 17.48 mmol), Pd(PPh3)4 (1.684 g, 1.457 mmol) and 1,4-dioxane (36 mL). The reaction mixture was purged with nitrogen for several minutes before aqueous 2M sodium carbonate (14.57 mL, 29.1 mmol) solution was added. The reaction mixture was then purged with nitrogen for another 10 minutes at 25° C. before it was heated to 90° C. under nitrogen overnight. 1,4-Dioxane was removed in vacuo and the crude mixture was diluted with EtOAc. The product was washed with water (3×) and brine. The combined organic layers were dried over MgSO4, filtered and concentrated under reduced pressure. The crude material was purified on silica gel chromatography eluting with MeOH:CH2Cl2 (2:98) to yield 3.75 g (12.13 mmol, 83%) of the title product as an off white solid; 1H NMR (300 MHz, DMSO-d6) δ 8.99 (s, 2H), 7.44 (dd, J=8.1, 7.5 Hz, 1H), 7.13-6.93 (m, 1H), 6.47-6.34 (m, 1H), 6.04 (s, 2H), 5.22-4.90 (m, 1H), 3.67 (t, J=6.1 Hz, 2H), 2.32-1.95 (m, 4H); m/z found [M+H]+=310.45.

1. additionwas added
2. customThe reaction mixture was then purged with nitrogen for another 10 minutes at 25° C. before it
3. custom1,4-Dioxane was removed in vacuo
4. additionthe crude mixture was diluted with EtOAc
5. washThe product was washed with water (3×) and brine
6. dry with materialThe combined organic layers were dried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe crude material was purified on silica gel chromatography
10. washeluting with MeOH:CH2Cl2 (2:98)