反应详情

A mixture of (4) (1.39 g, 5.81 mmol) and Pd/BaSO4 (5 wt %, 0.47 g) in methanol and chloroform was hydrogenated at 50 psi for one hour. The reaction mixture was filtered through a bed of Celite, and washed with methanol. The solvents were removed under vacuum. The crude product was purified by chromatography on silica gel with 2 to 3% ammonia saturated methanol in dichloromethane to give 7-((5-Methyl-1H-imidazol-4-yl)methyl)-6,7-dihydroquinolin-8(5H)-one (5) as a yellow oil (0.830 g, 344 mmol, 59% yield).

1. filtrationThe reaction mixture was filtered through a bed of Celite
2. washwashed with methanol
3. customThe solvents were removed under vacuum
4. customThe crude product was purified by chromatography on silica gel with 2 to 3% ammonia saturated methanol in dichloromethane