The present invention relates to a process for the preparation of enantiomerically enriched 3-aminopiperidine, and in particular of its R-enantiomer (R)-3-aminopiperidine. The invention also relates to an enantiomerically enriched intermediate of said process and to specific acid-addition salts of 3-aminopiperidine (hereinafter also APIP) that are useful for obtaining a single enantiomer of APIP, and to crystalline (R)-3-aminopiperidine-dihydrochloride-monohydrate and crystalline (S)-3-aminopiperidine-di-hydrochloride-monohydrate.
本发明涉及一种制备对映体富集的
3-氨基哌啶,特别是其 R-对映体 (R)-3-
氨基
哌啶的工艺。本发明还涉及上述工艺的对映体富集中间体,以及有助于获得 A
PIP 单个对映体的
3-氨基哌啶(以下简称 A
PIP)的特定酸加成盐,以及结晶的 (R)-3-
氨基
哌啶二盐酸盐一
水合物和结晶的 (S)-3-
氨基
哌啶二盐酸盐一
水合物。