反应详情

温度

0 °C

To a 0° C. solution of (2R,3S)-tert-butyl 2-((tert-butyldimethylsilyloxy)methyl)-3-hydroxypyrrolidine-1-carboxylate (1equiv) in DMF (0.5 M) was added NaH (1.3 equiv) as a solid. After stirring for 15 min at 0° C., 3,5-difluoronitrobenzene (1.2 equiv) was added by syringe. The reaction mixture was allowed to warm to room temperature and stirred for 2 h. The reaction was quenched by the addition of water, and the mixture was diluted with EtOAc. The organic layer was washed four times with water and once with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Purification by flash chromatography (0-20% EtOAc/Hexanes) provided the title compound in 82% yield.

1. temperatureto warm to room temperature
2. stirringstirred for 2 h
3. customThe reaction was quenched by the addition of water
4. additionthe mixture was diluted with EtOAc
5. washThe organic layer was washed four times with water
6. dry with materialonce with brine, dried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customPurification by flash chromatography (0-20% EtOAc/Hexanes)