| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to a method of producing perfluorovinyl ethers of general formula: RfO-CF=CF2 (IA), where Rf denotes C1-C3, preferably C1-C2, an alkyl perfluorinated substitute, which can be used as monomers for producing different polymers - from fluorinated elastomers to fluorinated heat-sensitive semi-crystalline polymers. The method involves the following steps: 1a) using fluorine to fluorinate olefins of formula: CY"Y=CY'Cl (II) where Y, Y' and Y", identical or different from each other, denote H, Cl, Br, provided that Y, Y' and Y" do not simultaneously denote hydrogen; said olefins are selected from CCl2=CCl2 or CHCl=CCl2, and obtaining fluorohalocarbons of formula: FCY''Y-CY'CIF (III), where Y, Y', Y" are as described above; 2a) dehalogenation or dehydrohalogenation of fluorohalocarbons of formula (III), where the halogen/halide ion is Cl, and obtaining fluoro-haloolefin of formula: CFCl=CFCl (IV), 3a) reaction between a hypofluorite of formula RfOF, where Rf is as described above, and fluoro-haloolefin (IV), and obtaining fluorohalogenated ethers of formula: RfO-CFClCF2Cl (I) 4a) dehalogenation of compounds (I) and obtaining perfluorovinyl ethers of formula (IA). ^ EFFECT: method enables to obtain the desired products with high output and selectivity. ^ 16 cl, 9 ex |
