4-Carbamoyl-1-(3-methoxyphenyl)pyridinium chloride → 1-(3-Methoxyphenyl)piperidine-4-carboxamide

Participants

Reaction Steps

A suspension of 4-carbamoyl-1-(3-methoxyphenyl)-pyridinium chloride (26 g) in methanol (300 ml) was hydrogenated at ambient temperature and pressure in the presence of 10% palladium-on-carbon catalyst (2.0 g) until hydrogen uptake ceased (~2 days) The mixture was filtered, excess triethylamine added and the solvent removed in vacuo to give a pink solid. This was partitioned between water and chloroform. The organic phase was dried and the solvent removed in vacuo to give 1-(3-methoxyphenyl)piperidine-4-carboxamide as a pink solid (19 g), m.p. 153°-156° C.

Provenance & Evidence