反应详情

温度

80 °C

In a microwave vial a mixture of (4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (8a, 110 mg, 0.295 mmol), 5-cyano-3-pyridinyl boronic acid (43.6 mg, 0.295 mmol), and cesium carbonate (384 mg, 1.179 mmol) in THF (2.0 mL) and water (983 μL) was purged with argon for 5 min. Dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane adduct (12.04 mg, 0.015 mmol) was added and the tube was sealed and the mixture was heated at 80° C. overnight. Additional 3-cyanopyridine-5-boronic acid pinacol ester (67.8 mg, 0.295 mmol) and dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane adduct (12.04 mg, 0.015 mmol) were added. The reaction mixture was stirred at 80° C. for another 6 h. After cooling to room temperature, the reaction mixture was partitioned between EtOAc and water and brine. The aqueous layer was back extracted with EtOAc (2×) and the combined organics was washed with brine, dried (Na2SO4) and concentrated. The crude material was purified by chromatography through a Redi-Sep pre-packed silica gel column (12 g), eluting with a gradient of 0% to 0% EtOAc in hexane, to provide 5-(3-((4S,6S)-2-amino-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)nicotinonitrile (77 mg, 0.194 mmol, 65.9% yield) as off-white solid. MS m/z=397 [M]+. Calculated for C18H13F5N4O: 396.31.

1. customwas purged with argon for 5 min
2. customthe tube was sealed
3. temperatureAfter cooling to room temperature
4. customthe reaction mixture was partitioned between EtOAc and water and brine
5. extractionThe aqueous layer was back extracted with EtOAc (2×)
6. washthe combined organics was washed with brine
7. dry with materialdried (Na2SO4)
8. concentrationconcentrated
9. customThe crude material was purified by chromatography through a Redi-Sep pre-packed silica gel column (12 g)
10. washeluting with a gradient of 0% to 0% EtOAc in hexane