| 摘要 |
A process for preparing 1,3-dioxolanes of formula: (see figure I) wherein; X1, X2, X3 and X4, like or different from one another, re- present F, Cl, Br, I, CF20S02F, S02F, C(0)F, H, perhaloalkyl or oxyperhaloalkyl radicals containing from 1 to 5 carbon atoms, X5 and X6, like or different from each other, represent F or CF3. The process is characterized in that a bis(fluoroxy)- perfluoroalkane is reacted, at a temperature ranging from -140.degree.C to +60.degree.C, with a halogenated olefin, New 1,3-dioxolanes of formula (I) belonging to the class defined hereinbefore.
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