Process for manufacturing of L-DOPA ethyl ester
    1.
    发明授权
    Process for manufacturing of L-DOPA ethyl ester 失效
    制备L-DOPA乙酯的方法

    公开(公告)号:US06218566B1

    公开(公告)日:2001-04-17

    申请号:US09437700

    申请日:1999-11-10

    IPC分类号: C07C22900

    CPC分类号: C07C227/42 C07C229/36

    摘要: A process for manufacturing a highly purified, stable, non-hygroscopic, crystalline composition of L-DOPA ethyl ester. The L-DOPA ethyl ester is an active ingredient in many pharmaceutical preparations for the treatment of patients suffering from Parkinson's Disease and related indications.

    摘要翻译: 一种用于制造高纯度,稳定,非吸湿性的L-DOPA乙酯的结晶组合物的方法。 L-DOPA乙酯是用于治疗患有帕金森病和相关适应症的患者的许多药物制剂中的活性成分。

    Optical resolution of
threo-2-hydroxy-3-(2-aminophenylthio)-3-(4-methoxyphenyl)-propionic acid
    5.
    发明授权
    Optical resolution of threo-2-hydroxy-3-(2-aminophenylthio)-3-(4-methoxyphenyl)-propionic acid 失效
    苏-2,2-二羟基-3-(2-氨基苯硫基)-3-(4-甲氧基苯基) - 丙酸的光学拆分

    公开(公告)号:US5302741A

    公开(公告)日:1994-04-12

    申请号:US90602

    申请日:1993-07-12

    CPC分类号: C07C319/28 C07C323/56

    摘要: D(+)-threo-2-hydroxy-3-(2-aminophenylthio)-3-(4-methoxyphenyl)propionic acid, an important intermediate in the synthesis of diltiazem hydrochloride, is obtained in better yields and high optical purity by a novel resolution process comprising the reaction of 2 moles of the (.+-.) racemic acid with 1 mole of quinine and 1 mole of a base in a suitable polar solvent system to form a salt of the D(+) acid and quinine which precipitates; separating said salt and decomposing it with a strong base.

    摘要翻译: D(+) - 苏氨基-2-羟基-3-(2-氨基苯硫基)-3-(4-甲氧基苯基)丙酸是盐酸地尔硫卓合成中的重要中间体,其产率较高,光学纯度高 包括在合适的极性溶剂体系中将2摩尔(+ - )外消旋酸与1摩尔奎宁和1摩尔碱反应以形成沉淀的D(+)酸和奎宁的盐的新的拆分方法; 分离所述盐并用强碱分解。