HCID 15096760, compound → cis-1-(1H-benzimidazol-2-ylmethyl)-3-methoxy-4-piperidinamine dihydrate

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Reaction Steps

A mixture of 18 parts of cis-1-(1H-benzimidazol-2-ylmethyl)-3-methoxy-N-(phenylmethyl)-4-piperidinamine 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 (93:7 by volume), saturated with ammonia, as eluent. The pure fractions were collected and the eluent was evaporated. The residue solidified slowly and the solid product was suspended in 2,2'-oxybispropane. The product was filtered off and dried at the air, yielding 6 parts of cis-1-(1H-benzimidazol-2-ylmethyl)-3-methoxy-4-piperidinamine dihydrate:mp. 92.0° C. (intermediate 122).

Provenance & Evidence