Process for preparing an intermediate
    25.
    发明授权
    Process for preparing an intermediate 失效
    制备中间体的方法

    公开(公告)号:US5023365A

    公开(公告)日:1991-06-11

    申请号:US453791

    申请日:1989-12-20

    IPC分类号: C07C67/52

    CPC分类号: C07C67/52

    摘要: A process is described for preparing an intermediate in the synthesis of naproxen.The intermediate, namely the methyl ester of S(+)-2-(5-bromo-6-methoxy-2-naphthyl)-propionic acid or of its 5-chloro analogue, is prepared by preferential crystallization from mixtures with its enantiomer.

    摘要翻译: 描述了在萘普生合成中制备中间体的方法。 中间体即S(+) - 2-(5-溴-6-甲氧基-2-萘基) - 丙酸或其5-氯类似物的甲基酯通过与​​其对映异构体的混合物进行优先结晶来制备。