| 摘要 |
The present invention relates to a process for the preparation of fluoroalkyl perfluorovinyl ethers of formula: <CHEM> wherein: Y is Br or F; X is F, Cl or Br or their mixtures when n is equal to or higher than 2; n is comprised within the range of from 0 to 4; Rf represents a perfluoroalkylene radical containing from 1 to 8 C atoms. The process is characterized in that a fluoroalkoxy perfluoroacyl fluoride of formula: <CHEM> is slowly heated with a salifying agent and a solvent, in the presence of catalytic amounts of N,N-dimethylformamide, with an end temperature comprised within the range of from 60 to 150 DEG C being reached. |
