Process for preparing an optical active ester of naphthylpropionic acid
    4.
    发明授权
    Process for preparing an optical active ester of naphthylpropionic acid 失效
    制备萘基丙酸的光学活性酯的方法

    公开(公告)号:US4417070A

    公开(公告)日:1983-11-22

    申请号:US367044

    申请日:1982-04-09

    CPC分类号: C07C51/43 C07C51/487

    摘要: Disclosed is a process for preparing an optical active alkyl ester of .alpha.-(6-methoxynaphth-2-yl)propionic acid from the racemic modification thereof or from a mixture of the optical isomers thereof by preferential crystallization. The efficiency of the optical resolution can be increased by adding a base which facilitates the racemization. The process comprises dissolving the racemic modification or the optical isomers in an organic solvent such as methanol, ethanol, etc., with or without a base such as sodium methoxide, sodium ethoxide, etc., and seeding seed crystals of one of the optical isomers to effect crystallization for optical resolution.

    摘要翻译: 本发明公开了一种通过外消旋化合物制备α-(6-甲氧基萘-2-基)丙酸的光学活性烷基酯或通过优先结晶从其旋光异构体的混合物制备的方法。 通过添加促进外消旋化的碱可以提高光学拆分的效率。 该方法包括将外消旋变体或光学异构体溶解在有机溶剂如甲醇,乙醇等中,使用或不用碱如甲醇钠,乙醇钠等,并将一种旋光异构体的晶种 以实现光学分辨率的结晶。