Process for preparing chiral sulphoxides
    4.
    发明授权
    Process for preparing chiral sulphoxides 失效
    制备手性亚砜的方法

    公开(公告)号:US4990676A

    公开(公告)日:1991-02-05

    申请号:US311819

    申请日:1989-02-17

    申请人: Stephen G. Davies

    发明人: Stephen G. Davies

    CPC分类号: C07C317/00 C07B45/04

    摘要: A process for preparing single enantiomers of chiral sulphoxides is provided. The process involves (a) reacting an achiral sulphur-containing, e.g. a disulphide, with a single enantiomer of a chiral template having the formula T--(CO)--CH.sub.2 R.sup.1, wherein T is suitably (eta.sup.5 --C.sub.5 H.sub.5)Fe(CO)(PPh.sub.3)-- (Ph=phenyl) and (b) thereafter sterospecifically oxidizing the sulphur atom with an oxidizing agent. A single enantiomer of the chiral sulphoxide can then be generated by reacting the oxidized product with a carbanion. In a preferred embodiment the reaction mixture is thereafter treated with further achiral sulphide to provide a process which is catalytic on the chiral template.