Racemization of atropisomeric bis(phosphine oxide) compounds
    2.
    发明授权
    Racemization of atropisomeric bis(phosphine oxide) compounds 有权
    无规异构双(氧化膦)化合物的外消旋化

    公开(公告)号:US06288280B1

    公开(公告)日:2001-09-11

    申请号:US09594643

    申请日:2000-06-15

    IPC分类号: C07F953

    CPC分类号: C07F9/5329 C07F9/5054

    摘要: A process for the racemization of atropisomeric bis(phosphine oxide) compounds of formula I: in their (S) or (R) or non-racemic form, is useful for preparing optical active bisphosphine ligands, that form optical active complexes with transition metals. Racemization is thermal and carried out in high or low boiling solvent, under normal or elevated pressure at 105 to 3.5×107 Pa. Heating is performed in a system that allows heating up to 400° C. (reactor, autoclave, aluminum block, round-bottom flask with heating/stirring mantle and the like) or by microwave irradiation or in the melt at a temperature from 260 to 400° C.

    摘要翻译: 式(I)或(R)或非外消旋形式的式I的阻转异构双(氧化膦)化合物外消旋化的方法可用于制备与过渡金属形成光学活性配合物的光学活性双膦配体。 外消旋化是热和在高沸点溶剂或低沸点溶剂中,在正常或升高的压力下,在105-3.5×10 7 Pa下进行,在允许加热到400℃的系统中进行加热(反应器,高压釜,铝块, 具有加热/搅拌罩等的底烧瓶)或通过微波照射或在260-400℃的温度下在熔体中进行。