Process for producing 2-fluorine-1-cyclopropane carboxylic acid
derivatives by reductive dehalogenation
    1.
    发明授权
    Process for producing 2-fluorine-1-cyclopropane carboxylic acid derivatives by reductive dehalogenation 失效
    通过还原脱卤制备2-氟-1-环丙烷羧酸衍生物的方法

    公开(公告)号:US06130350A

    公开(公告)日:2000-10-10

    申请号:US180810

    申请日:1998-11-16

    IPC分类号: C07C67/317 C07C69/74

    CPC分类号: C07C67/317

    摘要: Cyclopropanecarboxylic acid derivatives are prepared by reacting halogenocyclopropanecarboxylic acid derivatives with metals in the presence of bases and with or without addition of hydrogen in an advantageous manner if the base is added during the reaction. By means of the process according to the invention, good yields and selectivities and a high proportion of cis isomers in the reaction product may be achieved.

    摘要翻译: PCT No.PCT / EP97 / 02210 Sec。 371日期:1998年11月16日 102(e)日期:1998年11月16日PCT 1997年4月30日PCT PCT。 公开号WO97 / 44309 日期1997年11月27日如果在反应期间加入碱,可以通过在碱存在下使卤代环丙烷羧酸衍生物与金属反应,并在有或没有添加氢的情况下以有利的方式进行反应来制备环丙烷甲酸衍生物。 通过本发明的方法,可以实现反应产物中良好的收率和选择性以及高比例的顺式异构体。

    Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates
    7.
    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。