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    • 2. 发明授权
    • Synthesis of low-fluoride organic compounds
    • 低氟有机化合物的合成
    • US06252105B1
    • 2001-06-26
    • US09348072
    • 1999-07-06
    • Max BraunJohannes EicherFrancine JanssensKerstin EichholzStefan Palsherm
    • Max BraunJohannes EicherFrancine JanssensKerstin EichholzStefan Palsherm
    • C07C6963
    • C07C67/56C07C51/47C07C51/64C07C53/18C07C67/14C07C67/58C07C53/48C07C59/195C07C69/63C07C69/72
    • Organic compounds, e.g. fluorinated organic compounds such as fluorinated carboxylic acids or fluorinated carboxylic acid chlorides, may contain small amounts of carboxylic acid fluorides, hydrogen fluoride or hydrolyzable fluoride, which during the preparation of derivatives of the fluorinated organic compounds, for example by esterification, may yield corrosive fluorides or hydrogen fluoride. The invention is a method for the synthesis and/or purification of preferably fluorinated organic compounds such as carboxylic acids, carboxylic acid chlorides and derivatives such as esters thereof, starting from corresponding carboxylic acid chlorides containing acid fluorides or hydrolyzable fluoride, and alcohols under the catalytic action of “onium” salts of carboxylic acids, to obtain products which have a low fluoride content. Alternatively, an inorganic oxide adsorbent is utilized. The method is especially suitable for the synthesis of esters of trifluoroacetic acid, chlorodifluoroacetic acid, trifluoroacetoacetic acid and/or difluoroacetoacetic acid.
    • 有机化合物,例如 含氟有机化合物如氟化羧酸或氟化羧酸氯化物可含有少量羧酸氟化物,氟化氢或水解性氟化物,其在氟化有机化合物衍生物的制备过程中,例如通过酯化反应,可产生腐蚀性氟化物 或氟化氢。 本发明是一种合成和/或纯化优选氟化有机化合物如羧酸,羧酸氯化物及其衍生物如酯的方法,起始于含有酸性氟化物或可水解氟化物的相应的羧酸氯化物和催化剂下的醇 羧酸的“鎓”盐的作用,以获得具有低氟含量的产物。 或者,使用无机氧化物吸附剂。 该方法特别适用于三氟乙酸,氯二氟乙酸,三氟乙酰乙酸和/或二氟乙酰乙酸的酯的合成。
    • 10. 发明授权
    • Production of aminohalogencrotonates
    • 生产氨基卤代巴豆酸酯
    • US06423866B1
    • 2002-07-23
    • US09530909
    • 2000-05-08
    • Max BraunFrancine JannssensWerner RudolphKerstin Eichholz
    • Max BraunFrancine JannssensWerner RudolphKerstin Eichholz
    • C07C22900
    • C07C227/08C07C229/30
    • Lower alkyl esters of 3-amino crotonates substituted by halogen in the C-4 position, e.g. ethyl 3-amino-4,4,4-trifluoro-crotonate, in which the amino group optionally may be substituted by one or two C1 to C3 alkyl groups or by one or two aryl groups, e.g. phenyl, are synthesized by thermolysis of ammonium salts of corresponding lower alkyl esters of acetoacetic acid substituted in the C-4 position by halogen, and removal of the resulting water of reaction. The water of reaction may be removed by an entraining agent, which preferably has a specific gravity heavier than that of the aqueous phase which forms in the reaction. This minimizes yield losses due to the ammonium salt becoming dissolved in the aqueous phase and results in especially high yields. Formation of the ammonium salt and thermolysis can be carried out simultaneously. Alternatively, it is possible to start from a molten ammonium salt of the halogencrotonate, e.g. the salt of the lower alkyl ester of 4,4,4-trifluoroacetoacetic acid, or to produce the salt in situ, and to pass an inert gas through the molten salt under thermolytic conditions and in the absence of a solvent. In this way the desired product can be produced in high yield and in high purity. This alternative can be implemented as a continuous process.
    • C-4位被卤素取代的3-氨基巴豆酸酯的低级烷基酯,例如 3-氨基-4,4,4-三氟巴豆酸乙酯,其中氨基可任意地被一个或两个C 1至C 3烷基取代,或被一个或两个芳基取代。 苯基,通过用卤素热解在C-4位置取代的乙酰乙酸的相应低级烷基酯的铵盐,除去所得的反应水来合成。 反应水可以通过夹带剂除去,该夹带剂优选具有比在反应中形成的水​​相重的比重。 这使得由于铵盐溶解在水相中导致的产量损失最小化并导致特别高的产率。 铵盐的形成和热解可以同时进行。 或者,可以从卤代克酸内酯的熔融铵盐开始,例如, 4,4,4-三氟乙酰乙酸的低级烷基酯的盐,或者在原位产生盐,并在惰性溶解条件下和不溶于溶剂的条件下使惰性气体通过熔融盐。 以这种方式,可以以高产率和高纯度生产所需的产物。 这种替代方案可以被实现为连续过程。