(2S,3S)-3-Hydroxy-1-(4-methoxybenzyl)-piperidine-2-carboxamide.

The article focuses on the crystallization of the compound (2S,3S)-3-hydroxy-1-(4-methoxybenzyl)-piperidine-2-carboxamide. The crystal structure involves intermolecular hydrogen bonds. In the compound the piperidine ring is in the chair conformation. In the experiment (2R,3S)-3-Hydroxy-1-(4-methoxybenzyl)piperidine-2-carbonitrile was dissolved in HCl solution. Crystals of the compound were obtained by recrystallization from a mixture of ethyl acetate and petroleum ether.