Process for preparing 2,4-diamino-pyrimidines
    38.
    发明授权
    Process for preparing 2,4-diamino-pyrimidines 失效
    制备2,4-二氨基 - 嘧啶的方法

    公开(公告)号:US4255574A

    公开(公告)日:1981-03-10

    申请号:US967676

    申请日:1978-12-08

    申请人: Perry Rosen

    发明人: Perry Rosen

    IPC分类号: C07D239/48 C07D239/49

    CPC分类号: C07D239/48 C07D239/49

    摘要: A process for preparing a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkoxy or taken together are methylenedioxy; R.sub.3 is lower alkyl or hydrogen, which comprises the step of reacting an aromatic compound of the formula ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are as previously described, with a diamino-pyrimidine of the formula ##STR3## wherein R.sub.4 is lower alkoxy, benzyloxy, hydroxy or halogen, in the presence of an inorganic or organic acid selected from the group consisting of ortho-phosphoric acid, poly-phosphoric acid, hydrohalic acids and tri-haloacetic acids, at a temperature in the range of from about 50.degree. C. to about 110.degree. C., is described.

    摘要翻译: 制备式Ⅰ化合物的方法,其中R 1和R 2为低级烷氧基或一起为亚甲二氧基; R3是低级烷基或氢,其包括使式IMAMA的芳族化合物(其中R 1,R 2和R 3如前所述)与下式的二氨基 - 嘧啶反应的步骤,其中R 4是低级烷氧基, 苄氧基,羟基或卤素,在选自正磷酸,聚磷酸,氢卤酸和三卤代乙酸的无机或有机酸的存在下,在约50℃ 至约110℃。