Asymmetric epoxides, their synthesis and use
    3.
    发明授权
    Asymmetric epoxides, their synthesis and use 失效
    不对称环氧化物,它们的合成和用途

    公开(公告)号:US06228955B1

    公开(公告)日:2001-05-08

    申请号:US08953946

    申请日:1997-10-20

    IPC分类号: C08F28304

    摘要: A process for preparing an optically-enriched chiral epoxide of formula I wherein R1, R2 and R3 are each independently selected from H, R, R—CO— and R—O—CO—, each R independently being substantially a hydrocarbon group of up to 20 carbon atoms, and X is an alkyl or cycloalkyl group of up to 10 carbon atoms, provided that —CO—X is not enolisable, which comprises the asymmetric epoxidation of a corresponding prochiral alkene of formula II R1R2C═CR3—CO—X  (II) by reaction with an oxidant in the presence of a chiral catalyst. Many optically-enriched epoxides (I) are novel.

    摘要翻译: 制备式I的光学富集手性环氧化物的方法,其中R1,R2和R3各自独立地选自H,R,R-CO-和RO-CO-,每个R独立地基本上是至多20个碳的烃基 原子,X是至多10个碳原子的烷基或环烷基,条件是-CO-X不是可烯化的,其包括在手性存在下与氧化剂反应的相应的式II的前手性烯的不对称环氧化 催化剂。 许多光学富集的环氧化物(I)是新颖的。