申请人:NIPPON KAYAKU KABUSHIKI KAISHA
公开号:EP0657446A1
公开(公告)日:1995-06-14
The present invention relates to a process for producing an optically active erythro-3-amino-1,2-epoxy compound represented by the following general formula (3):
wherein R1 represents a hydrocarbon residue having 3 to 12 carbon atoms; and R2 represents optionally protected amino, provided that when the carbon atom at the *3-position has an S configuration, then the carbon atom at the *2-position has an S configuration, and when the carbon atom at the *3-position has an R configuration, then the carbon atom at the *2-position has an R configuration,
characterized by reducing an optically active threo-3-amino-2-substituted butyrate derivative represented by the following general (1):
wherein R1 and R2 are each as defined above; R3 represents a hydrocarbon residue having 1 to 12 carbon atoms; and R4 represents an ester residue, provided that when the carbon atom at the *3-position has an S configuration, then the carbon atom at the *2-position has an R configuration, and when the carbon atom at the *3-position has an R configuration, then the carbon atom at the *2-position has an S configuration, and then epoxidizing the obtained optically active threo-3-amino-2-substituted-1-butanol derivative represented by the following general formula (2):
wherein R1, R2, *2 and *3 are each as defined above, in the presence of a base to thereby give the target compound of the general formula (3).
本发明涉及一种生产光学活性赤式-3-氨基-1,2-环氧化合物的工艺,该化合物由以下通式(3)表示:
其中 R1 代表具有 3 至 12 个碳原子的烃残基;R2 代表任选受保护的氨基,条件是当 *3 位上的碳原子具有 S 构型时,则 *2 位上的碳原子具有 S 构型;当 *3 位上的碳原子具有 R 构型时,则 *2 位上的碳原子具有 R 构型、
其特征在于还原由以下通式(1)代表的光学活性苏-3-氨基-2-取代丁酸酯衍生物:
其中 R1 和 R2 各自如上定义;R3 代表具有 1 至 12 个碳原子的烃残基;和 R4 代表酯残基,条件是当*3 位上的碳原子具有 S 构型时,则*2 位上的碳原子具有 R 构型,当*3 位上的碳原子具有 R 构型时,则*2 位上的碳原子具有 S 构型,然后将所得到的具有光学活性的由以下通式(2)代表的硫代-3-氨基-2-取代-1-丁醇衍生物环氧化:
其中 R1、R2、*2 和 *3 各如上所定义,在碱存在下,得到通式(3)的目标化合物。