申请人:DPx Fine Chemicals Austria GmbH & Co KG
公开号:EP3301087A1
公开(公告)日:2018-04-04
The invention pertains to a process for the preparation of an amine having at least two chiral centers from a ketone having a chiral center at the α position and an amine comprising the steps of:
(a) contacting a ketone having a chiral center at the α position and a primary amine thereby forming an imine;
(b) contacting the imine with a reducing agent in the presence of an enantioselective catalyst to form an amine having at least two chiral centers,
wherein step (a) and/or step (b) are conducted under racemization-enhancing conditions, wherein the racemization-enhancing conditions are achieved by addition of an acid and/or by addition of a salt of a primary amine and an acid, which salt is added in addition to or instead of the primary amine, and wherein the reducing agent is hydrogen.
本发明涉及一种由在α位具有手性中心的酮和胺制备至少具有两个手性中心的胺的工艺,包括以下步骤:
(a) 将在α位具有手性中心的酮与伯胺接触,形成亚胺;
(b) 在对映体选择性催化剂存在下,将亚胺与还原剂接触,形成具有至少两个手 性中心的胺、
其中步骤(a)和/或步骤(b)是在消旋化增强条件下进行的,消旋化增强条件是通过加入酸和/或加入伯胺和酸的盐实现的,该盐是在伯胺之外加入或代替伯胺加入的,还原剂是氢。