Derivatives of 2-pyrrolidone-5-carboxylic acid and method of obtaining
them
    4.
    发明授权
    Derivatives of 2-pyrrolidone-5-carboxylic acid and method of obtaining them 失效
    2-吡咯烷酮-5-羧酸的衍生物及其获得方法

    公开(公告)号:US4952706A

    公开(公告)日:1990-08-28

    申请号:US417089

    申请日:1989-10-04

    IPC分类号: C07D207/28

    CPC分类号: C07D207/28

    摘要: The new, crystalline trihydrates of sodium L- and D-2-pyrrolidone-5-carboxylate. These trihydrates can be obtained by adjusting the concentration and the temperature in an aqueous solution of sodium L- or D-2-pyrrolidone-5-carboxlate in such a manner that the solubility of the desired trihydrate is exceeded.

    摘要翻译: L-和D-2-吡咯烷酮-5-羧酸钠的新的结晶三水合物。 这些三水合物可以通过调节L型或D-2-吡咯烷酮-5-甲酸钠水溶液的浓度和温度,从而超过所需三水合物的溶解度。