HCID 19911536, compound → HCID 19911541, compound

Participants

Reaction Steps

A mixture of 16.7 parts of 2-[(4-methyl-1-piperazinyl)methyl]-3-[2-(phenylmethoxy)ethyl]-3H-imidazo[4,5-b]pyridine and 200 parts of methanol was hydrogenated at normal pressure and at room temperature with 3 parts of palladium-on-charcoal catalyst 10%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia, (95:5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from 2,2'-oxybispropane. The product was filtered off and dried, yielding 5.84 parts (46.1%) of 2-[(4-methyl-1-piperazinyl)methyl]-3H-imidazo[4,5-b]pyridine-3-ethanol; mp. 89.5° C. (compound 129).

Provenance & Evidence