反应详情

温度

100 °C

3-[(5-bromo-2-chloro-pyrimidin-4-yl)-(2-methylpropyl)amino]-N-methyl-propanamide (Intermediate 85; 3.26 g, 9.32 mmol)) was suspended in dioxane (70 mL), Caesium Carbonate (6 g, 18.64 mmol) was added and the mixture bubbled with nitrogen for 10 minutes. Tris(dibenzylideneacetone)dipalladium(0) (512 mg, 0.56 mmol) and XANTPHOS (485 mg, 0.839 mmol) were added and the mixture heated at 100° C. for 24 hrs. The reaction mixture was cooled to room temperature, solvent evaporated and the residues partitioned between DCM (250 mL) and water (250 mL). The aqueous phase was re-extracted with DCM (200 mL) and the combined organic phases dried over MgSO4 and evaporated to a dark brown gum which was taken up in DCM and purified on silica, eluting with a gradient of 30-50% Ethyl Acetate/iso-hexane then 50% Ethyl Acetate/iso-hexane. Fractions containing product were combined and evaporated to a yellow solid, which was heated at reflux in iso-hexane (50 mL) for 15 minutes and allowed to cool to room temperature overnight. The resulting solid was filtered and dried to give the title compound as a pale yellow solid (1.02 g, 41%)

1. customthe mixture bubbled with nitrogen for 10 minutes
2. temperatureThe reaction mixture was cooled to room temperature
3. customsolvent evaporated
4. customthe residues partitioned between DCM (250 mL) and water (250 mL)
5. extractionThe aqueous phase was re-extracted with DCM (200 mL)
6. dry with materialthe combined organic phases dried over MgSO4
7. customevaporated to a dark brown gum which
8. custompurified on silica
9. washeluting with a gradient of 30-50% Ethyl Acetate/iso-hexane
10. additionFractions containing product
11. customevaporated to a yellow solid, which
12. temperaturewas heated
13. temperatureat reflux in iso-hexane (50 mL) for 15 minutes
14. temperatureto cool to room temperature overnight
15. filtrationThe resulting solid was filtered
16. customdried