PROCESS FOR PREPARING GEMCITABINE AND ASSOCIATED INTERMEDIATES
    1.
    发明申请
    PROCESS FOR PREPARING GEMCITABINE AND ASSOCIATED INTERMEDIATES 审中-公开
    制备化合物和相关中间体的方法

    公开(公告)号:US20090221811A1

    公开(公告)日:2009-09-03

    申请号:US12430525

    申请日:2009-04-27

    IPC分类号: C07H19/06 C07D317/30

    摘要: The present invention provides processes for preparing intermediates useful in the preparation of gemcitabine and other nucleosides, and processes for preparing gemcitabine therewith. Exemplary intermediates include mixtures of D-erythro and D-threo isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)-propionic acid salts. Also provided is a process for selectively isolating the D-erythro and D-threo isomers of D-erythro and D-threo isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)-propionic acid salts, and processes for using such isomers in the preparation of nucleoside analogs such as, e.g., gemcitabine, intermediates thereof, and analogs thereof.

    摘要翻译: 本发明提供了制备可用于制备吉西他滨和其它核苷的中间体的方法,以及制备吉西他滨的方法。 示例性中间体包括3-(羟基)-2,2-二氟-3-(2,2-二甲基二氧代环戊烷-4-基) - 丙酸盐的D-赤藓糖醇和D-苏糖异构体的混合物。 还提供了选择性分离3-(羟基)-2,2-二氟-3-(2,2-二甲基二氧戊环-4-基)-2-甲基苯并呋喃的D-赤式和D-苏糖异构体的D-赤式和D-苏式异构体的方法, 以及在制备核苷类似物例如吉西他滨,其中间体及其类似物中使用这些异构体的方法。

    Process for Preparing Gemcitabine and Associated Intermediates
    3.
    发明申请
    Process for Preparing Gemcitabine and Associated Intermediates 审中-公开
    吉西他滨及相关中间体的制备方法

    公开(公告)号:US20070191598A1

    公开(公告)日:2007-08-16

    申请号:US11668963

    申请日:2007-01-30

    摘要: The present invention provides processes for preparing novel chemical substances that are useful as intermediates in the preparation of gemcitabine and processes for preparing gemcitabine therewith. Exemplary intermediates include mixtures of D-erythro and D-threo (3R- and 3S-) isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)propionic acid salts. Also provided is a novel process for selectively isolating the D-erythro and D-threo isomers of the said salts in purities of at least about 95%, and processes of using them for preparing nucleoside analogs such as, e.g., gemcitabine and intermediates and analogs thereof.

    摘要翻译: 本发明提供了制备可用作制备吉西他滨的中间体的新型化学物质的方法及其制备吉西他滨的方法。 示例性中间体包括3-(羟基)-2,2-二氟-3-(2,2-二甲基二氧戊环-4-基)丙酸盐的D-赤式和D-苏(3R-和3S-)异构体的混合物。 还提供了一种用于选择性分离所述盐的D-赤式和D-苏式异构体的纯度为至少约95%的新方法,以及用于制备核苷类似物如吉西他滨和中间体和类似物的方法 其中。