A process for preparing 2-Nitro-4'-Fluorobenzophenone
    71.
    发明公开
    A process for preparing 2-Nitro-4'-Fluorobenzophenone 审中-公开
    Verfahren zur Herstellung von 2-Nitro-4'-氟二苯甲酮

    公开(公告)号:EP1431270A1

    公开(公告)日:2004-06-23

    申请号:EP03017696.0

    申请日:2003-08-18

    CPC classification number: C07C201/12 C07C201/16 C07C205/45

    Abstract: The present invention is an improved process for preparing 2-nitro-4'-fluorobenzophenone which comprises contacting 2-nitrobenzoyl chloride and fluorobenzene in a reaction medium the presence of anhydrous ferric chloride. The process is typically performed at a temperature of -20°C to 25°C.

    Abstract translation: 本发明是制备2-硝基-4'-氟二苯甲酮的改进方法,其包括在反应介质中使无水氯化铁存在下的2-硝基苯甲酰氯和氟苯接触。 该方法通常在-20℃至25℃的温度下进行。

    PROCESS FOR PREPARATION OF AROMATIC COMPOUNDS
    77.
    发明授权
    PROCESS FOR PREPARATION OF AROMATIC COMPOUNDS 失效
    方法制备芳族化合物

    公开(公告)号:EP0970033B1

    公开(公告)日:2003-05-28

    申请号:EP98910828.7

    申请日:1998-03-12

    CPC classification number: C07C201/12 C07C45/36 C07C49/813 C07C49/83 C07C205/45

    Abstract: There is disclosed a process for the preparation of a compound of general formula (I), wherein Y and Z each independently represent a fluorine atom or a hydroxy group, and a, b, c and d independently represent 0, 1, 2 or 3 provided that the sum of a, b, c, and d is 1, 2, 3 or 4; the process comprising treating a compound of general formula (II), wherein a, b, c, and d are as described above and L?1 and L2¿ each independently represent an active group provided that either Y and L1 are different or Z and L2 are different, with a fluorinating system in the presence of oxygen. A preferred compound of general formula (I) is 4,4'-difluorobenzophenone which may be prepared from 4,4'-dinitrophenylmethane using tetramethylammonium fluoride.

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