Formic Acid → HCID 23284946, compound

Participants

Reaction Conditions

Reaction Steps

136 ml of formic acid was added to 210 g of 4-(2-phenylethylamino)-1-benzylpiperidine. Since the temperature of the mixture increased to about 90° C., the mixture was ice-cooled. To the reaction mixture was added 64 ml of 37% formalin at 50-60° C.; the ice bath was removed; and the mixture was stirred for 1 hour. To the resulting reaction mixture were added 1 liter of ethanol and 120 ml of concentrated hydrochloric acid, followed by concentration under reduced pressure. To the residue was added 1 liter of ethanol. The resulting insolubles were collected by filtration and then washed with ethanol to obtain 251.7 g of 4-[N-methyl-N-(2-phenylethyl)amino]-1-benzylpiperidine dihydrochloride as a white powder.

Provenance & Evidence