Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates
    6.
    发明授权
    Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates 有权
    制备2,4-二氧代四氢呋喃-3-羧酸酯的方法

    公开(公告)号:US08318955B2

    公开(公告)日:2012-11-27

    申请号:US12854517

    申请日:2010-08-11

    IPC分类号: C07D307/00

    CPC分类号: C07D307/60

    摘要: Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates of the formula (I) and/or (I′) comprising the reaction of a haloacetyl chloride compound of the formula (II) with a malonic ester of the formula (III) in which Hal, R1 and R2 have the definitions stated in the application, in the presence of a suitable base and optionally in the presence of a solvent; the addition of a sufficient amount of water to the reaction mixture; and the isolation of the desired 2,4-dioxotetrahydrofuran-3-carboxylate.

    摘要翻译: 制备式(I)和/或(I')的2,4-二氧代四氢呋喃-3-羧酸酯的方法,包括式(II)的卤代乙酰氯化合物与式(III)的丙二酸酯在 其中Hal,R 1和R 2具有本申请中所述的定义,在合适的碱存在下,任选地在溶剂存在下; 向反应混合物中加入足量的水; 并分离所需的2,4-二氧代四氢呋喃-3-羧酸乙酯。

    Dioxolane and dioxane derivatives and a process for their preparation
    10.
    发明授权
    Dioxolane and dioxane derivatives and a process for their preparation 有权
    二氧杂环戊烷和二恶烷衍生物及其制备方法

    公开(公告)号:US08222435B2

    公开(公告)日:2012-07-17

    申请号:US12969138

    申请日:2010-12-15

    CPC分类号: C07D317/30 C07D319/12

    摘要: The present invention relates to novel acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes of the general formula (I) in which R1, R2, R3 and n have the meanings given in the description, and also a novel process for their preparation. Acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes are important intermediates for the preparation of pyrazoles and anthranilamides, which can be used as insecticides.

    摘要翻译: 本发明涉及通式(I)的新型酰基亚甲基-1,3-二氧戊环和酰基亚甲基-1,4-二氧杂环己烷,其中R 1,R 2,R 3和n具有本说明书中给出的含义, 为他们的准备。 酰亚甲基-1,3-二氧戊环和酰亚胺-1,4-二氧杂环己烷是制备可用作杀虫剂的吡唑和邻氨基苯甲酰胺的重要中间体。