| 摘要 |
What are disclosed are methods for making compounds of the formula FSO2-O-CF2-Rf-COY, useful as intermediates for making perfluorinated vinyl ethers, wherein Rf is a single bond or perfluoralkylene and Y is fluorine or -OR, by heating an alpha , omega -bis-fluorosulfatoperfluoroalkane of the formula FSO2-O-CF2-Rf-CF2-O-SO2F in the presence of an alkali metal fluoride and/or an alkali metal hydrogen fluoride and, when Y is OR, in the presence of an alkanol, ROH. |
