反应详情

tert-Butyl 4-(cyanomethylene)piperidine-1-carboxylate (20 g, 91 mmol) was dissolved in ethyl acetate (400 mL), and 10% palladium-activated carbon (3.0 g) was added, followed by stirring at room temperature for 3.5 hours under a hydrogen atmosphere. The reaction solution was filtered with celite, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by chromatography on a silica gel column (Moritex Corporation, elution solvent: hexane/ethyl acetate), and a fraction corresponding to the Rf value=0.38 (hexane/ethyl acetate=3/1) by thin layer chromatography was concentrated under reduced pressure to afford the title compound (23 g) as a white solid (quantitative yield).

1. filtrationThe reaction solution was filtered with celite
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe resulting residue was purified by chromatography on a silica gel column (Moritex Corporation, elution solvent: hexane/ethyl acetate)
4. concentrationa fraction corresponding to the Rf value=0.38 (hexane/ethyl acetate=3/1) by thin layer chromatography was concentrated under reduced pressure