反应详情

To a slurry of 4-(4-nitro-isoquinolin-1-yloxy)-piperidine-1-carboxylic acid tert-butyl ester (33.5 g, 89.7 mmol) in THF (300 mL) and ethanol (300 mL) add 10% Pd/C (1.80 g, 1.69 mmol) as a slurry in ethanol (25 mL). Place the mixture in a Parr shaker under hydrogen atmosphere (25-40 psi) at room temperature for 8 hours. Filter the mixture through a pad of diatomaceous earth and wash with ethanol until the filtrate is colorless. Concentrate the filtrate under reduced pressure to give dark oil. Subject residue to silica gel chromatography eluting with 1% then 2.5% MeOH/dichloromethane to afford the title compound (30.3 g, 98% yield) as an orange glass. (ES+): m/z 344 (M++H).

1. customat room temperature
2. customfor 8 hours
3. filtrationFilter the mixture through a pad of diatomaceous earth
4. washwash with ethanol until the filtrate
5. concentrationConcentrate the filtrate under reduced pressure
6. customto give dark oil
7. washSubject residue to silica gel chromatography eluting with 1%