Processes for producing &bgr;-halogeno-&agr;-amino-carboxylic acids and phenylcysteine derivatives and intermediates thereof
    11.
    发明授权
    Processes for producing &bgr;-halogeno-&agr;-amino-carboxylic acids and phenylcysteine derivatives and intermediates thereof 失效
    制备β-卤代-α-氨基 - 羧酸和苯基半胱氨酸衍生物的方法及其中间体

    公开(公告)号:US06372941B1

    公开(公告)日:2002-04-16

    申请号:US09582461

    申请日:1999-08-16

    IPC分类号: C07C22900

    摘要: An industrially advantageous method of producing &bgr;-halogeno-&agr;-aminocarboxylic acids is provided. Methods are also provided of producing optically active N-protected-S-phenylcysteines having high optical purity and of intermediates thereof, respectively, in which the above production method is utilized. A method of producing &bgr;-halogeno-&agr;-aminocarboxylic acids or salts thereof is disclosed which comprises halogenating the hydroxyl group of a &bgr;-hydroxy-&agr;-aminocarboxylic acid (in which the basicity of the amino group in &agr;-position is not masked by the presence of a substituent on said amino group) or a salt thereof with an acid with a halogenating agent. A method of producing optically active N-protected-S-phenylcysteines represented by the general formula (3) or salts thereof is further disclosed which comprises applying the above production method to optically active serine or a salt thereof and then carrying out treatment with an amino-protecting agent and reaction with thiophenol under a basic condition.

    摘要翻译: 提供了产生β-卤代-α-氨基羧酸的工业上有利的方法。 还提供了分别制备具有高光学纯度的光学活性N-保护的S-苯基半胱氨酸及其中间体的方法,其中使用上述制备方法.1。制备β-卤代-α-氨基羧酸或其盐的方法 其中包括将β-羟基-α-氨基羧酸的羟基(其中在所述氨基上不存在取代基的α-位置上的氨基的碱性)或其盐与卤素化反应 具有卤化剂的酸。 进一步公开了制备由通式(3)表示的光学活性N-保护的S-苯基半胱氨酸或其盐的方法,其包括将上述制备方法应用于光学活性丝氨酸或其盐,然后用氨基 保护剂和与苯硫酚在基本条件下的反应。

    Processes for the preparation of threo-1,2-epoxy-3-amino-4-phenylbutane derivatives
    12.
    发明授权
    Processes for the preparation of threo-1,2-epoxy-3-amino-4-phenylbutane derivatives 有权
    制备苏式-1,2-环氧-3-氨基-4-苯基丁烷衍生物的方法

    公开(公告)号:US06344572B1

    公开(公告)日:2002-02-05

    申请号:US09647340

    申请日:2000-11-17

    IPC分类号: C07D30102

    CPC分类号: C07D301/26 C07D303/36

    摘要: The present invention provides a production method of high quality threo-1,2-epoxy-3-amino-4-phenylbutane derivatives (1) on a commercial scale in a simple, easy and efficient manner and with very high productivity, which comprises treating a threo-1-halo-2-hydroxy-3-amino-4-phenylbutane derivative (2) with a base in a polar organic solvent or a solvent composed of a polar organic solvent and water, and adding the resulting reaction mixture to water to thereby cause the resulting threo-1,2-epoxy-3-amino-4-phenylbutane derivative (1) to crystallize out.

    摘要翻译: 本发明以简单,容易和有效的方式以非常高的生产率提供了高质量的threo-1,2-epoxy-3-氨基-4-苯基丁烷衍生物(1)的制备方法,其包括处理 在极性有机溶剂或由极性有机溶剂和水组成的溶剂中的碱,将苏-1-卤代-2-羟基-3-氨基-4-苯基丁烷衍生物(2)与碱反应,并将得到的反应混合物加入到水 从而使得到的所述苏-12-环氧-3-氨基-4-苯基丁烷衍生物(1)结晶出来。