PROCESS FOR MAKING DIHYDROPYRIMIDINONES
    4.
    发明公开
    PROCESS FOR MAKING DIHYDROPYRIMIDINONES 失效
    制备二氢嘧啶酮的方法

    公开(公告)号:EP0882026A1

    公开(公告)日:1998-12-09

    申请号:EP96944785.0

    申请日:1996-12-12

    IPC分类号: C07D239 C07B61

    CPC分类号: C07D239/22

    摘要: The present invention provides a process for forming 5-(alkyl or alkoxy)carbonyl-6-alkyl-4-(aryl or alkyl)-3,4-2(1H)-dihydropyrimidinones by combining a β-keto ester or diketone, an aldehyde and urea in the presence of a boron reagent, a metal salt (e.g., Cu2O) and a catalyst (e.g., acid). The reaction is typically run in one pot in a solvent to afford dihydropyrimidinones in higher yields and with easier work up than previously known methods.

    摘要翻译: 本发明提供了一种通过结合β-酮酯或二酮,形成5-(烷基或烷氧基)羰基-6-烷基-4-(芳基或烷基)-3,4-2(1H) - 二氢嘧啶酮的方法, 醛和脲在硼试剂,金属盐(例如Cu 2 O)和催化剂(例如酸)​​存在下进行。 该反应通常在溶剂中在一个罐中进行,以比以前已知的方法更高的收率和更容易的后处理来提供二氢嘧啶酮。