反应详情

A mixture of 9.5 parts of 3-(2-chloroethyl)-2,6-dimethyl-4H-pyrido[1,2-a]-pyrimidin-4-one, 160 parts of methanol and 40 parts of 2-propanol saturated with hydrogen chloride was hydrogenated at normal pressure and at room temperature with 2 parts of palladium-on-charcoal catalyst 10%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off over Hyflo and the filtrate was evaporated, yielding 9.5 parts (86%) of 3-(2-chloroethyl)-6,7,8,9-tetrahydro-2,6-dimethyl-4H-pyrido[1,2-a]pyrimidin-4-one monohydrochloride (intermediate 175).

1. filtrationthe catalyst was filtered off over Hyflo
2. customthe filtrate was evaporated