反应详情

A solution of tert-butyl (S)-2-(3-fluorophenylethynyl)pyrrolidine-1-carboxylate (Intermediate 235, 1.26 g) in IMS (70 mL) was carefully added to 20% palladium on carbon (0.6 g) under a carbon dioxide atmosphere. The mixture was degassed under vacuum and placed under an atmosphere of hydrogen. This was repeated three times then the mixture was stirred under an atmosphere of hydrogen for 18 hours. The mixture was filtered through Celite and the filtrate was evaporated to dryness. The residue was purified by chromatography on silica, eluting with a mixture of DCM and pentane with a gradient of 0-100% to give tert-butyl (R)-2-[2-(3-fluoro-phenyl)ethyl]pyrrolidine-1-carboxylate (0.55 g) as an oil.

1. customThe mixture was degassed under vacuum
2. filtrationThe mixture was filtered through Celite
3. customthe filtrate was evaporated to dryness
4. customThe residue was purified by chromatography on silica
5. washeluting with a mixture of DCM and pentane with a gradient of 0-100%