反应详情

Hexahydro-cyclopenta[c]pyrrol-5-one trifluoroacetate 1f obtained from the above step was dissolved in 15 mL of acetonitrile with stirring. Upon cooling by an ice-water bath, potassium carbonate (0.24 g, 1.71 mmol) was added followed by dimethylcarbamic chloride (0.14 mL, 1.56 mmol). The reaction mixture was warmed up to room temperature and reacted for 2 hours. The mixture was concentrated under reduced pressure and diluted with 50 mL of water. The mixture was extracted with ethyl acetate (50 mL×3). The combined organic extracts were washed with 50 mL of saturated brine, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain the title compound N,N-dimethyl-5-oxo-hexahydro-cyclopenta[c]pyrrole-2-carboxamide 1g (0.19 g, yield 68.3%) as a light yellow oil.

1. temperatureUpon cooling by an ice-water bath
2. customreacted for 2 hours
3. concentrationThe mixture was concentrated under reduced pressure
4. additiondiluted with 50 mL of water
5. extractionThe mixture was extracted with ethyl acetate (50 mL×3)
6. washThe combined organic extracts were washed with 50 mL of saturated brine
7. dry with materialdried over anhydrous magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure
10. customThe resulting residue was purified by silica gel column chromatography