反应详情

温度

60 °C

To a stirring solution of 2-[(1-tert-butoxycarbonylpiperidin-4-ylcarbonyl)amino]-N-(5-chloropyridin-2-yl)-5-iodobenzamide (0.51 g, 0.88 mmol) in N,N-dimethylformamide (13 mL) under argon was added dichlorobis(triphenylphosphine)palladium(II) (28 mg, 0.04 mmol) and triethylamine (0.5 mL, 3.5 mmol) followed by water (3 mL). The reaction mixture was evacuated and placed under an atmosphere of carbon monoxide, heated at 60° C. for 3 h., and concentrated in vacuo. The resulting residue was partitioned between aqueous sodium bicarbonate and ethyl acetate and the layers separated. The aqueous phase was treated with a small amount of dichloromethane and then solid citric acid to pH 3. The resulting mixture was extracted with 3:1 chloroform:isopropanol. The organic phase was dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude product was purified by chromatography over silica gel, eluting with 2:4:0.5 ethyl acetate:toluene:acetic acid. The chromatography product was slurried in diethyl ether and filtered to give 0.31 g (69%) of a yellow solid.

1. customThe reaction mixture was evacuated
2. concentrationconcentrated in vacuo
3. customThe resulting residue was partitioned between aqueous sodium bicarbonate and ethyl acetate
4. customthe layers separated
5. additionThe aqueous phase was treated with a small amount of dichloromethane
6. extractionThe resulting mixture was extracted with 3:1 chloroform
7. dry with materialThe organic phase was dried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customThe crude product was purified by chromatography over silica gel
11. washeluting with 2:4:0.5 ethyl acetate
12. filtrationfiltered