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    • 5. 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 carboxylic acid fluorides
    • 羧酸氟化物的生产
    • US06489510B1
    • 2002-12-03
    • US09319451
    • 1999-07-29
    • Max BraunKerstin EichholzWerner Rudolph
    • Max BraunKerstin EichholzWerner Rudolph
    • C07C5338
    • C07C51/60B01J19/02B01J19/123B01J2219/00078B01J2219/0245B01J2219/0254B01J2219/0875C07C51/58C07C53/50C07C53/48C07C53/46
    • A method for producing carboxylic acid fluorides of the formula RCFXC(O)F, where X represents fluorine or chlorine, in good yields and with good selectivity for the carboxylic acid fluorides by reacting compounds of the formula RCFXCHFCl with oxygen by photochemical oxidation in the gaseous phase, preferably under sensitization with chlorine and using light having a wavelength &lgr;≧280 nm, which conditions make it possible to work without the use of pressure. Glass apparatus may be covered with a protective coating so as to protect it against traces of hydrogen fluoride. To this end, for example, heat-shrinkable sleeves made of light-permeable hydrogen fluoride-resistant material may be used. Polytetrafluoroethylene, polyfluoropropylene or a mixture thereof are especially suitable for this purpose. This type of protection is also suitable for other reactions such as photo-induced fluoro-dediazonation in hydrogen fluoride/pyridine for the production of aromatic compounds fluorinated in the nucleus or the oxidation of CHCl2 groups for the production of carboxylic acid chlorides.
    • 通过使式RCFXCHFCl的化合物与氧通过光化学氧化反应生成式RCFXC(O)F的羧酸氟化物的方法,其中X表示氟或氯,以良好的产率和对羧酸氟化物具有良好的选择性 相,优选用氯敏感并使用波长λ= 280nm的光,该条件使得可以在不使用压力的情况下工作。 玻璃装置可以用保护涂层覆盖,以保护其免受痕量的氟化氢。 为此,例如,可以使用由透光耐氟化氢材料制成的热收缩套筒。 聚四氟乙烯,聚氟丙烯或其混合物特别适用于此目的。 这种类型的保护也适用于其它反应,例如在氟化氢/吡啶中用于生产在核中氟化的芳族化合物的光引发的氟 - 重氮化或用于生产羧酸氯化物的CHCl 2基团的氧化。