反应详情

To (2R,3S)-1-(tert-butoxycarbonyl)-3-hydroxypyrrolidine-2-carboxylic acid (4.812 g, 20.81 mmol) in DMF (30 mL) at 0° C. was added tert-butylchlorodimethylsilane (9.409 g, 62.43 mmol) and triethylamine (10.53 g, 104.0 mmol). The cold bath was removed and the reaction mixture was stirred for 16 hours. The mixture was diluted with EtOAc (50 mL) and 10% NaOH (30 mL), and the phases were separated. The organic phase was washed with 10% NaOH. The combined aqueous phases were acidified with concentrated HCl until pH=2. The aqueous phase was extracted with DCM. The combined organic phases were dried (Na2SO4) and concentrated under reduced pressure to give the crude product 6.86 g).

1. customThe cold bath was removed
2. additionThe mixture was diluted with EtOAc (50 mL) and 10% NaOH (30 mL)
3. customthe phases were separated
4. washThe organic phase was washed with 10% NaOH
5. extractionThe aqueous phase was extracted with DCM
6. dry with materialThe combined organic phases were dried (Na2SO4)
7. concentrationconcentrated under reduced pressure