反应详情

温度

0 °C

To a solution of 1.4 g (6.7 mmol) of tert-butyl [(1R,3S)-3-(hydroxymethyl)cyclopentyl]carbamate in 20 mL of anhydrous THF are added portionwise under argon, at room temperature, 0.27 g (6.7 mmol) of sodium hydride at 60% in oil. After stirring for 45 minutes, the medium is cooled to 0° C. and 0.8 mL (6.7 mmol) of benzyl bromide is added. After stirring for 1 hour at room temperature, the medium is hydrolysed with 30 mL of water and extracted with 2×100 mL of EtOAc, dried over Na2SO4, concentrated under reduced pressure and then purified by chromatography on a column of silica gel, eluting with a 99/1 DCM/MeOH mixture. 1.53 g of tert-butyl {(1R,3S)-3-[(benzyloxy)methyl]cyclopentyl}carbamate are obtained in the form of an oil.

1. stirringAfter stirring for 1 hour at room temperature
2. extractionextracted with 2×100 mL of EtOAc
3. dry with materialdried over Na2SO4
4. concentrationconcentrated under reduced pressure
5. custompurified by chromatography on a column of silica gel
6. washeluting with a 99/1 DCM/MeOH mixture