Process for the production of chiral propionic acid derivatives

    公开(公告)号:US20070249842A1

    公开(公告)日:2007-10-25

    申请号:US11811071

    申请日:2007-06-08

    IPC分类号: C07D263/30

    CPC分类号: C07D413/12

    摘要: The present invention is concerned with a novel process for the preparation of compounds of formula I comprising catalytic asymmetric hydrogenation of a compound of formula (II) in the presence of a catalyst comprising ruthenium and a chiral diphosphine ligand or comprising rhodium and a chiral diphosphine ligand, wherein R1, R2, R3 and R4 are as defined in the specification and claims. The compounds of formula I and the corresponding salts and/or esters are pharmaceutically active substances.