反应详情

温度

70 °C

Dissolve trans-5-chloro-pentanoic acid-[4-(tert-butyl-dimethyl-silanyloxy)-cyclohexyl]-amide (22.7 g, 65.1 mmol) in anhydrous THF (500 mL), add sodium hydride (60% dispersion in mineral oil, 13.0 g, 0.32 mol) by portions and heat the reaction mixture at 70° C. for 18 hours. Cool the reaction mixture to room temperature, quench with water (200 mL) and extract with DCM (3×100 mL). Dry the organic layer over anhydrous Na2SO4, remove the solvent and purify the residue by chromatography over silica gel (eluting with 0 to 50% EtOAc in hexane) to obtain trans-1-(4-[tert-butyl-dimethyl-silanyloxy)-cyclohexyl]-piperidin-2-one as a white solid (15.0 g, 74%): MS (ES+) m/z=312 (M+H)+.

1. temperatureCool the reaction mixture to room temperature
2. customquench with water (200 mL)
3. extractionextract with DCM (3×100 mL)
4. dry with materialDry the organic layer over anhydrous Na2SO4
5. customremove the solvent
6. custompurify the residue by chromatography over silica gel (eluting with 0 to 50% EtOAc in hexane)