反应详情

温度

100 °C

To tert-butyl [-1-(3-bromo-5-chloro-4-cyano-2-ethoxyphenyl)ethyl]carbamate (50 mg, 0.1 mmol, from Example 179, Step 3) and 3-(methylsulfonyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (30. mg, 0.11 mmol, Peptech, catalog #BE358) in 1,4-dioxane (4 mL) was added potassium carbonate (30 mg, 0.2 mmol) in water (2 mL). The reaction was degassed with N2. Tetrakis(triphenylphosphine)palladium(0) (40 mg, 0.04 mmol) was added and degassed again with N2. The reaction was heated at 100° C. overnight. The reaction was allowed to cool to room temperature and was partitioned between EtOAc and water. The combined organic layer was washed with brine, dried over MgSO4, filtered and concentrated to give crude product. The product was purified by chromatography on silica gel eluting with a hexane:EtOAc gradient to give tert-butyl (1-{5-chloro-4-cyano-2-ethoxy-3-[5-(methylsulfonyl)pyridin-3-yl]phenyl}ethyl)carbamate as a yellow oil (0.030 g, 60%). LCMS calculated for C22H27ClN3O5S (M+H)+: m/z=480.1. found: 480.1.

1. customThe reaction was degassed with N2
2. customdegassed again with N2
3. temperatureto cool to room temperature
4. customwas partitioned between EtOAc and water
5. washThe combined organic layer was washed with brine
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customto give crude product
10. customThe product was purified by chromatography on silica gel eluting with a hexane