Synthése d'époxydes et d'éthers glycidiques á chaîne chlorofluorée

Epoxides of general formula

(II, V) (R_F,Cl = Cl ; CF₃ ; Cl(CFClCF₂)_n?) are prepared from chlorohydrines R_F,ClCCl₂CH₂CHClCH₂OH (I).These chlorhydrines are monoadducts of carbon tetrachloride 1,1,1 trichlorotrifluoroethane, telomers Cl(CFClCF₂)_nCCl₃, with allyl alcohol.Reactions of these epoxides with lithium aluminium hydride and/or sulfuric acid lead to corresponding secondary alcohols and/or diols. Glycidyl ethers of (I) and (II,n) with epichlorhydrin could not be obtained. However, epichlorhydrin reacts with the more acidic chlorofluorinated alcohol CFCl₂CF₂CH₂OH. Thus, the glycidyl ether

is prepared.