Hydrochloric Acid → Methyl-phenethyl-piperidin-4-YL-amine

Participants

Reaction Steps

60 ml of concentrated hydrochloric acid and 13.3 g of 10% palladium-carbon were added to a solution of 266 g of 4-[N-methyl-N-(2-phenylethyl)amino]-1-benzylpiperidine in 1 liter of ethanol and 500 ml of water. The mixture was stirred at a hydrogen pressure of 1 atm. at 60° C. for 5 hours. 10% palladium-carbon was removed by filtration and then washed with ethanol. The filtrate and the washings were combined and concentrated under reduced pressure. The residue was added to ice water. The mixture was made alkaline with a 25% aqueous sodium hydroxide solution and then extracted with methylene chloride. The extract was water-washed and then concentrated under reduced pressure. The residue was subjected to vacuum distillation to obtain 131.9 g of 4-[N-methyl-N-(2-phenylethyl)amino]piperidine as a colorless oil.

Provenance & Evidence