Ethyl chloroformate → ethyl N-(1-benzylpiperidin-4-yl)carbamate

Participants

Reaction Steps

Ethyl chloroformate (30 g, 0.276 mol) was added at 0° C. to 4-amino-1-phenylmethylpiperidine (50 g, 0.262 mol) in pyridine (600 mL). After the addition, the mixture was kept at room temperature overnight, and the pyridine was then evaporated. The residue was extracted with methylene chloride; and the resulting solution washed with water, dried over sodium sulfate, and the methylene chloride evaporated to dryness. The residue was dissolved in diisopropyl ether. A white product precipitated, which was isolated by filtration to yield 42.71 g (62%) of ethyl (1-phenylmethyl-4-piperidyl)-carbamate, m.p. 100° C.

Provenance & Evidence