Process for halogenating carboxylate compounds
    4.
    发明公开
    Process for halogenating carboxylate compounds 失效
    Verfahren zur Halogenierung von Karboxylverbindungen。

    公开(公告)号:EP0000414A1

    公开(公告)日:1979-01-24

    申请号:EP78200077.2

    申请日:1978-07-03

    摘要: Process for halogenating carboxylate compounds having at least one reactive alpha hydrogen substituent, comprising contacting said carboxylate compound with a halogen or halogen source in the presence of an effective amount of a cyanoquinone compound and acidic auxiliary agent, a catalyse system comprising the cyanoquinone material and the acidic auxiliary agent, and a halogenation medium comprising a halogen, selected from chlorine and bromine and a catalyst system comprising a cyanoquinone material and an acidic auxiliary agent.

    摘要翻译: 用于卤化具有至少一个反应性α氢取代基的羧酸酯化合物的方法,包括在有效量的氰基醌化合物和酸性助剂的存在下使所述羧酸酯化合物与卤素或卤素源接触,包含氰基醌材料和 酸性助剂和包含选自氯和溴的卤素的卤化介质和包含氰基醌材料和酸性助剂的催化剂体系。

    Preparation of carboxylic acids
    5.
    发明公开
    Preparation of carboxylic acids 审中-公开
    Verfahren zur Herstellung vonCarbonsäuren

    公开(公告)号:EP1754697A1

    公开(公告)日:2007-02-21

    申请号:EP05017930.8

    申请日:2005-08-18

    申请人: Solvay S.A.

    摘要: Carboxylic acids can be prepared by reacting compounds comprising a -CCl 2 F group, a CCIF 2 group or a CCl 3 group with sulfur trioxide and sulfuric acid. The reaction is especially suitable for the preparation of 3,3,3-trifluoropropionic acid from CF 3 -CH 2 -CCl 2 F, CF 3 -CH 2 -CCIF 2 , CF 3 -CH 2 -CCl 3 or a mixture of one or two thereof as starting material. Usually, oleum is used as the source for sulfur trioxide.
    In a preferred embodiment, the starting material comprises CF 3 -CH 2 -CCl 2 F and/or CF 3 -CH 2 -CCIF 2 which is or are prepared in a fluorination reaction between CCl 3 -CH 2 -CCl 3 and HF. As a source for CCl 3 -CH 2 -CCl 2 , the product of the reaction between CH 2 =CCl 2 and CCl 4 is advantageously used.

    摘要翻译: 羧酸可以通过使包含-CCl 2 F基团,CCIF 2基团或CCl 3基团的化合物与三氧化硫和硫酸反应来制备。 该反应特别适用于由CF 3 -CH 2 -CCl 2 F,CF 3 -CH 2 -CCIF 2,CF 3 -CH 2 -CCl 3或其混合物制备3,3,3-三氟丙酸 或其两个作为起始材料。 通常,使用发烟硫酸作为三氧化硫的来源。 在优选的实施方案中,原料包含在CCl 3 -CH 2 -CCl 3和HF之间的氟化反应中制备的或CF 3 -CH 2 -CCl 2 F和/或CF 3 -CH 2 -CClF 2。 作为CCl 3 -CH 2 -CCl 2的来源,有利地使用CH 2 = CCl 2和CCl 4之间的反应的产物。