反应详情

Nipecotic acid (1.31 g, 10.2 mmol), benzaldehyde (1.12 g, 10.6 mmol) and 5% palladium-carbon (0.18 g) in methanol (10 mL) was stirred at room temperature for one day under a hydrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was dissolved in methanol (50 mL) was stirred with benzaldehyde (4.40 g, 41.5 mmol) and 5% palladium-carbon (0.118 g) at room temperature for one day. The reaction mixture was filtered, and the filtrated was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (chloroform/methanol=10/1→5/1 (v/v)) to give the title compound as a colorless oil (1.41 g, yield 63%).

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate was concentrated under reduced pressure
3. dissolutionThe resulting residue was dissolved in methanol (50 mL)
4. filtrationThe reaction mixture was filtered
5. concentrationthe filtrated was concentrated under reduced pressure
6. customThe resulting residue was purified by silica gel column chromatography (chloroform/methanol=10/1→5/1 (v/v))