Synthesis of 2-alkyl amino acids
    3.
    发明授权
    Synthesis of 2-alkyl amino acids 失效
    2-烷基氨基酸的合成

    公开(公告)号:US07576234B2

    公开(公告)日:2009-08-18

    申请号:US11305305

    申请日:2005-12-16

    IPC分类号: C07C321/00

    摘要: Non-natural amino acids such as 2-alkylated amino acids allow for the synthesis of a wider variety of peptidal and non-peptidal pharmaceutically active agents. A method of preparing a 2-alkyl amino acid involves a Michael-type addition of a nucleophile to a dialkyl 2-methylidenylpropan-1,3-dioate and the conversion of a ester moiety into an amino moiety. The present invention also discloses a method of preparing a class of iron chelating agents related to desferrithiocin, all of which contain a thiazoline ring. In this method, an aryl nitrile or imidate is condensed with cysteine, a 2-alkyl cysteine, or a cysteine ester.

    摘要翻译: 非天然氨基酸例如2-烷基化氨基酸允许合成更多种类的肽和非肽类药物活性剂。 制备2-烷基氨基酸的方法包括向2-甲基亚烷基丙-1,3-二酸二烷基酯的双键加成亲核试剂,并将酯部分转化成氨基部分。 本发明还公开了一种制备与脱铁硫杆菌相关的一类铁螯合剂的方法,所述铁螯合剂全部含有噻唑啉环。 在该方法中,芳基腈或亚氨酸酯与半胱氨酸,2-烷基半胱氨酸或半胱氨酸酯缩合。

    Process for preparation of chiral amlodipine salts
    6.
    发明授权
    Process for preparation of chiral amlodipine salts 失效
    手性氨氯地平盐的制备方法

    公开(公告)号:US06846932B1

    公开(公告)日:2005-01-25

    申请号:US10718267

    申请日:2003-11-20

    IPC分类号: C07D211/86

    CPC分类号: C07D211/90

    摘要: A process for the preparation of pharmaceutically acceptable salts of chiral Amlodipine namely S(−) Amlodipine and R(+) Amlodipine from without isolation of a free base from with optical purity rank between 96-99% is described in the present invention. The process comprises resolving RS amlodipine base using of L(+) or D(−) tartaric acid to obtain salt of corresponding to the acid used in ee rang from 96-99%.

    摘要翻译: 在本发明中描述了制备手性氨氯地平的药学上可接受的盐即S( - )氨氯地平和R(+)氨氯地平的方法,该方法不分离游离碱与光学纯度等级在96-99%之间。 该方法包括使用L(+)或D( - )酒石酸分解RS氨氯地平碱,以获得与96-99%的所用酸相当的盐。