New and Efficient Syntheses of α-Iodo-α,α-Difluoro- and β-Iodo-α,α,β,β-Tetrafluorocarboxylic Acid Derivatives as Useful Building Blocks for Making Functional Fluoro Compounds
作者:Ming-H. Hung、Lu Long、Zhen-Yu Yang
DOI:10.1021/jo035170j
日期:2004.1.1
converted into various α-iodo-perfluorocarboxylic acid derivatives or telomerized with tetrafluoroethylene to I(CF2CF2)nOSO2Cl. Ring-opening reaction of perfluoroalkoxypentafluorocyclopropane with iodine at 240 °C produced ICF2CF2COF, which was quenched by alcohol, water, or NH3 to give β-iodo-α,α,β,β-tetrafluorocarboxylic acid derivatives. These functional fluorinated iodides can be used as building blocks
全氟烯烃与I-Cl和ClSO 3 H在温和的条件下反应,得到R F CFICF 2 OSO 2 Cl,可以很容易地将其转化为各种α-碘-全氟羧酸衍生物,也可以用四氟乙烯将其端粒化为I(CF 2 CF 2)n OSO 2 Cl。全氟烷氧基五氟环丙烷与碘在240°C下的开环反应生成ICF 2 CF 2 COF,将其用酒精,水或NH 3淬灭得到β-碘-α,α,β,β-四氟羧酸衍生物。这些功能性氟化碘化物可以用作制备选择性氟化化合物的结构单元。
Oxydation anodique de iodoperfluoroalcanes dans les acides perfluoroalcanesulfoniques. Preparation de nouveaux esters sulfoniques totalement fluores RFSO3R'F a longues chaines
作者:A. Germain、A. Commeyras
DOI:10.1016/s0040-4020(01)92420-2
日期:1981.1
perfluoroalkane sulphonic acids RFSO3H (RF CF3, C2F5, C4F9) and fluorosulphuricacid. With di-iodo compoundI(CF2)4I, the mono and the diester can be selectively obtained. The alkaline hydrolysis of these esters produces perfluorinated carboxylic compounds. Polyfluorinated iodide R'FCH2CH2I are also oxidized in similar conditions. The mechanism of the electrolytic reaction is discussed.
全氟化磺酸酯[R ˚F SO 3 R ' ˚F和fluorosulphates FSO 3 R' ˚F,很容易被iodoperfluoroalkanes的阳极氧化得到的R” ˚F我在全氟链烷磺酸类R ˚F SO 3 H(R ˚F CF 3,C 2 ˚F 5,C 4 F 9)和氟代硫酸。使用二碘化合物I(CF 2)4 I,可以选择性地获得单和二酯。这些酯的碱水解产生全氟化的羧酸化合物。多氟碘化物R'F CH 2 CH 2 I在类似条件下也会被氧化。讨论了电解反应的机理。