反应详情

4-Hydroxypiperidine (0.25 g, 2.5 mmol) and (tert-butoxycarbonylimino-pyrazol-1-yl-methyl)-carbamic acid tert-butyl ester (0.78 g, 2.2 mmol) (Drake, B. et al. Synthesis 1994, 6, 579-582) were dissolved in THF (1 mL) and stirred for 1 hour. The solvent was removed under reduced pressure and EtOAc (20 mL) was added. The organic was washed with an aqueous solution of 15% NaOH (5×15 mL), dried (Na2SO4) and concentrated under reduced pressure to afford [tert-butoxycarbonylimino-(4-hydroxy-piperidin-1-yl)-methyl]-carbamic acid tert-butyl ester as a white solid (0.47 g, 55%).

1. customThe solvent was removed under reduced pressure and EtOAc (20 mL)
2. additionwas added
3. washThe organic was washed with an aqueous solution of 15% NaOH (5×15 mL)
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated under reduced pressure