Hydrochloric Acid → 1-[4-Hydroxy-1-(4-pyridyl)piperidin-4-ylmethy]-2-piperazinone Hydrochloride

Participants

Reaction Steps

To a solution of 4-benzyloxycarbonyl-1-[4-hydroxy-1-(4-pyridyl)piperidin-4-ylmethyl]-2-oxo-1,2,3,4-tetrahydropyrazine (6.93 g) in methanol (100 ml) were added 4N hydrochloric acid in ethyl acetate (4 ml) and 10% palladium on carbon (2.0 g), and the mixture was stirred, under hydrogen atmosphere, at room temperature for 15 hours. The catalyst was removed by filtration, and the filtrate was concentrated and dried under reduced pressure to give colorless syrup of the title compound (5.39 g).

Provenance & Evidence