Synthesis of N-substituted diamides of difluoromalonic and tetrafluorosuccinic acids and x-ray structure of the N,N?-bis(2-carboxyethyl)diamide of tetrafluorosuccinic acid
METHODS FOR PRODUCING PERFLUOROALKANEDI(SULFONYL CHLORIDE)
申请人:UMEMOTO TERUO
公开号:US20090105502A1
公开(公告)日:2009-04-23
Novel methods for preparing perfluoroalkanedi(sulfonyl chloride) are disclosed as are uses for these compounds. In one aspect, a method comprising reacting dibromoperfluoroalkane with Na
2
S
2
O
4
followed by treating with chlorine, an organic compound, and then chlorine to form perfluoroalkanedi(sulfonyl chloride) is provided. Novel perfluoroalkanedi(sulfonyl bromide) compounds are also disclosed.
Halogen fluorosulfate reactions with fluorocarbons
作者:Carl J. Shack、K.O. Christe
DOI:10.1016/s0022-1139(00)85149-0
日期:1980.7
reaction of simple fluorocarbon halides with chlorine fluorosulfate and mixtures of chlorine and bromine fluorosulfate to produce RfOSO2F compounds has been investigated. It is shown that in many cases even primary chlorine in -CF2Cl groups can be replaced by -OSO2F, Primary bromine or iodine in -CF2X are more readily replaced. The mechanism of this replacement reaction has been established by the isolation
研究了简单的氟碳卤化物与氟代硫酸氯以及氯和溴代硫酸氟的混合物生成R f OSO 2 F化合物的反应范围。结果表明,在许多情况下,即使-CF 2 Cl基团中的伯氯也可以被-OSO 2 F取代,-CF 2 X中的伯溴或碘更容易被取代。这种置换反应的机理是通过分离亚稳碘Ⅲ中间体R f I(OSO 2 F)2来建立的。-CFX-基团中的仲氯或溴均不受影响。使用二次碘化物iC 3 F 7I,形成盐[(iC 3 F 7)2 I] + [I(OSO 2 F)4 ] -。此外,已经发现ClOSO 2 F能够将碳氟酸或其衍生物转化为碳氟卤化物。这两种ClOSO 2 F反应与已知的R f CF 2 OSO 2 F转化为相应的氟碳酸的组合可根据以下方式为其他未反应的氟碳卤化物提供新颖的高产链缩短反应:
Preparation of halogenated compounds
申请人:E. I. Du Pont de Nemours and Company
公开号:US05504248A1
公开(公告)日:1996-04-02
Halogenated compounds are prepared by ring opening reactions of highly fluorinated cyclopropanes with chlorine, bromine, iodine, or mixtures thereof at temperatures over 100.degree. C. A novel compound, which is one type of compound produced, is a highly fluorinated and halogenated ether and other novel compounds are starting materials or products. The products of the process are useful as chain transfer agents for certain free radical polymerizations, and as chemical intermediates in the preparation of various products such as surfactants and textile surface treatments.
Environmentally Benign Processes for Making Useful Fluorocarbons: Nickel- or Copper(I) Iodide-Catalyzed Reaction of Highly Fluorinated Epoxides with Halogens in the Absence of Solvent and Thermal Addition of CF<sub>2</sub>I<sub>2</sub> to Olefins
作者:Zhen-Yu Yang
DOI:10.1021/jo0354488
日期:2004.4.1
yields. The reaction probably involves an oxidative addition of fluorinated epoxides into metal surfaces to form an oxametallacycle, followed by rapid decomposition to difluorocarbene−metal surfaces, which alters the reactivity of the difluorocarbene carbon from electrophilic to nucleophilic. The increase of nucleophilicity of difluorocarbene facilitates the reaction with electrophilic halogens. CF2I2 reacted
高度氟化环氧化物与镍粉或CuI和在升高的温度下存在的卤素反应以提供dihalodifluoromethanes的有用和一般合成(CF 2 X 2)和氟酰基氟化物(R ˚F在无溶剂COF)。在185°C下,六氟环氧丙烷和卤素以68-90%的分离产率生成CF 2 X 2(X = I,Br),以及少量X(CF 2)n X(n = 2,3)。含卤素间化合物X(X = Cl,Br),CF 2 I 2,CF 2 XI和CF 2 X 2的混合物获得了。被全氟苯基,氟磺酰基和氯氟烷基取代的氟化环氧化物也与碘干净反应,以高收率得到CF 2 I 2和相应的氟化酰基氟。该反应可能涉及将氟化环氧化物氧化添加到金属表面以形成氧杂金属环,然后迅速分解为二氟卡宾-金属表面,从而将二氟卡宾碳的反应性从亲电性变为亲核性。二氟卡宾的亲核性的增加促进了与亲电子卤素的反应。CF 2我2与烯烃热反应得到1,3-二碘氟丙烷衍生物。氟
1,.omega.-Perfluoroalkylation of aromatics via bis-decarboxylation of perfluorodicarboxylic acids with xenon difluoride
作者:Valery K. Brel、Viktor I. Uvarov、Nikolai S. Zefirov、Peter J. Stang、Ron Caple