4-[4-(Benzyloxy)butyl]-6-methoxypyrido[2,3-b]pyrazin-3(4H)-one → 4-(4-Hydroxybutyl)-6-methoxypyrido[2,3-b]pyrazin-3(4H)-one

Participants

Reaction Steps

To a solution of 4-[4-(benzyloxy)butyl]-6-methoxypyrido[2,3-b]pyrazin-3(4H)-one (847 mg, 2.5 mmol) in ethyl acetate (20 ml) 20% palladium hydroxide (400 mg) was added and the catalytic hydrogenation was carried out at room temperature for 90 minutes. After removing the catalyst by filtration, the solvent was removed under reduced pressure, the obtained residue was dissolved in dichloromethane (20 ml) to which manganese dioxide (1.09 g, 12.5 mmol) was then added, and the mixture was stirred overnight at room temperature. After removing manganese dioxide by filtration, the solvent of the filtrate was removed under reduced pressure and the obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate) to yield 548 mg (88%) of the title compound in the form of a light brown solid.

Provenance & Evidence