申请人:Takasago International Corporation
公开号:EP0452143A2
公开(公告)日:1991-10-16
A process for preparing an optically active 3-hydroxypyrrolidine derivative:
wherein Q represents an optionally substituted phenyl group; and * indicates an asymmetric carbon atom,
comprises reacting 1 mole of an optically active 4-halo-3-hydroxybutane derivative:
wherein R¹ represents a lower alkyl group a phenyl group which may be substituted with lower alkyl or alkoxy or halogen; and X represents a halogen atom, dissolved in an alcohol, with 1 to 2 moles of a benzylamine or a derivative thereof (II): H₂NCH₂Q
and heating the mixture of reflux for 5 to 20 hours.
Preparation of starting material (I) is described.
The exemplified yields are 37-97 wt %:
The starting compound (I) is easily available by a simple chemical synthesis, without use of any expensive reagent.
一种制备光学活性 3-羟基吡咯烷衍生物的工艺:
其中 Q 表示任选取代的苯基;* 表示不对称碳原子、
包括使 1 摩尔光学活性 4-卤代-3-羟基丁烷衍生物反应:
其中 R¹ 代表低级烷基,苯基,可被低级烷基、烷氧基或卤素取代;X 代表卤素原子,溶解在醇中,与 1 至 2 摩尔的苄胺或其衍生物反应(II):H₂NCH₂Q
并将混合物加热回流 5 至 20 小时。
起始原料 (I) 的制备方法已描述。
示例产率为 37-97 wt %:
起始化合物 (I) 可通过简单的化学合成轻易获得,无需使用任何昂贵的试剂。