Catalyzed fluorination of carbonyl compounds
    1.
    发明授权
    Catalyzed fluorination of carbonyl compounds 失效
    催化羰基化合物的氟化

    公开(公告)号:US06300511B1

    公开(公告)日:2001-10-09

    申请号:US09463030

    申请日:2000-03-27

    IPC分类号: C07F902

    摘要: The present invention provides a method of substituting a carbonyl compound with fluorine at the &agr;-position, comprising reaching the carbonyl compound with a fluorinating present of a metal-containing catalyst. The reaction results in replacement of a hydrogen atom by fluorine. The catalyst, which is used in a catalytically effective amount, is preferably a transition metal. In one class of methods the catalyst is a transition metal compound. In another class of methods, the catalyst is an elemental metal, in which case the carbonyl compound has an activating group attached to the carbon atom which is substituted by fluorine.

    摘要翻译: 本发明提供了在α-位置用氟取代羰基化合物的方法,包括用含金属的催化剂的氟化存在物到达羰基化合物。 该反应导致用氟代替氢原子。 以催化有效量使用的催化剂优选为过渡金属。 在一类方法中,催化剂是过渡金属化合物。 在另一类方法中,催化剂是元素金属,在这种情况下,羰基化合物具有与被氟取代的碳原子连接的活化基团。

    Fluorination of dicarbonyl compounds
    4.
    发明授权
    Fluorination of dicarbonyl compounds 失效
    二羰基化合物的氟化

    公开(公告)号:US07253303B2

    公开(公告)日:2007-08-07

    申请号:US10505083

    申请日:2003-02-19

    IPC分类号: C07C69/63 C07C17/00

    CPC分类号: C07C67/307 C07C69/716

    摘要: The invention provides a method for the preparation of a dicarbonyl compound of formula (I) R1COCFR2COR3 wherein R1 is selected from alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl and acetoxy, R2 is selected from hydrogen, halogen, nitro, cyano, alkyl, substituted alkyl, cycloalkyl, acetoxy, aryl and substituted aryl, and R3 is selected from alkyl, substitued alkyl, oxyalkyl and substituted oxyalkyl, the method comprising treating a dicarbonyl compound of formula (II) R1COCHR2COR3 with elemental fluorine in a solvent which consists of methanol or aqueous methanol. The method provides an inexpensive and convenient synthetic route to 2-fluoro- and 2,2-difluoro-1,3-diketones and -1,3-ketoesters.

    摘要翻译: 本发明提供一种制备式(I)的二羰基化合物的方法,其中R 1,R 2,R c, 选自烷基,取代的烷基,环烷基,芳基,取代的芳基和乙酰氧基,R 2选自氢,卤素,硝基,氰基,烷基,取代的烷基,环烷基,乙酰氧基, 芳基和取代的芳基,R 3选自烷基,取代的烷基,烷氧基和取代的烷氧基,该方法包括处理式(II)的二羰基化合物R 1 COCHR 在由甲醇或甲醇水溶液组成的溶剂中,使用元素氟。 该方法为2-氟-2,2-二氟-1,3-二酮和-1,3-酮酯提供了便宜且方便的合成途径。