Vinylating of pyrimidine derivatives
    1.
    发明授权
    Vinylating of pyrimidine derivatives 有权
    嘧啶衍生物的乙烯基化

    公开(公告)号:US06437118B1

    公开(公告)日:2002-08-20

    申请号:US09577708

    申请日:2000-05-23

    IPC分类号: C07H19067

    摘要: The invention relates to a process for the preparation of vinyl pyrimidines of the formula I wherein R1 is hydrogen or a carboxylic ester group, and R2 is hydrogen or a group of the formula (a) wherein Ra is hydrogen, a protecting group or a group easily hydrolyzable under physiological conditions, by reacting a compound of the formula II wherein R21 is hydrogen or a group (a) wherein hydroxy groups are optionally protected, R3 is bromo, chloro or iodo, and R1 is as above, with a vinyl borane compound in the presence of a Pd complex and a base, and optionally, further reacting a product of formula I wherein R2 is hydrogen with a compound of the formula IV wherein Rb is a hydroxy protecting group and Z is a leaving group, in the presence of a Lewis acid catalyst.

    摘要翻译: 本发明涉及制备式I的乙烯基嘧啶的方法,其中R1是氢或羧酸酯基,R2是氢或式(a)的基团,其中Ra是氢,保护基或基团 在生理条件下可水解,通过使式II化合物,其中R 21是氢或其中羟基任选地被保护的基团(a),R 3是溴,氯或碘,R 1如上所述与乙烯基硼烷化合物在 Pd络合物和碱的存在,以及任选地进一步使其中R2是氢的式I的产物与式IV化合物反应,其中Rb是羟基保护基,Z是离去基团,在路易斯酸存在下 催化剂。