Process for the preparation of fludarabine or fludarabine phosphate from
guanosine
    2.
    发明授权
    Process for the preparation of fludarabine or fludarabine phosphate from guanosine 失效
    从鸟苷制备氟达拉滨或氟达拉滨磷酸盐的方法

    公开(公告)号:US5602246A

    公开(公告)日:1997-02-11

    申请号:US981114

    申请日:1992-11-25

    CPC分类号: C07H19/16 C07H19/20

    摘要: A process for the production of fludarabine or fludarabine phosphate is provided, wherein the nucleoside guanosine or a suitable derivative is employed as the starting material. The guanosine starting material is subjected to (a) conversion of the 6-keto group into a 6-amino group, (b) conversion of the 2-amino group to a 2-fluoro group, and (c) conversion of the ribofuranosyl moiety to an arabinofuranosyl moiety. Steps (a), (b), and (c) can be performed individually or concomitantly and in any sequence.

    摘要翻译: 提供了制备氟达拉滨或氟达拉滨磷酸盐的方法,其中使用核苷鸟苷或合适的衍生物作为起始原料。 将鸟苷起始原料(a)将6-酮基转化为6-氨基,(b)将2-氨基转化为2-氟基,和(c)转化呋喃核糖基部分 到阿拉伯呋喃糖基部分。 步骤(a),(b)和(c)可以单独或伴随地以任何顺序进行。

    6-azido-2-fluoropurine, useful in the synthesis of nucleosides
    4.
    发明授权
    6-azido-2-fluoropurine, useful in the synthesis of nucleosides 失效
    6-AZIDO-2-FLUOROPURINE,有用的合成核酸

    公开(公告)号:US5180824A

    公开(公告)日:1993-01-19

    申请号:US620236

    申请日:1990-11-29

    摘要: This invention pertains to novel methods of synthesizing fludarabine, fludarabine phosphate and related nucleoside pharmacologic agents utilizing 6-azido-2-fluoropurine as a novel intermediate.In particular this invention pertains to a synthesis of fludarabine where the relatively low yield fluorination step is done before the costly coupling step.

    摘要翻译: 本发明涉及使用6-叠氮基-2-氟嘌呤作为新型中间体合成氟达拉滨,氟达拉滨磷酸盐和相关核苷药物学的新方法。 特别地,本发明涉及氟达拉滨的合成,其中在昂贵的偶联步骤之前进行相对低的产率氟化步骤。