| 摘要 |
<p>A process for preparing a dioxolane of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="26" wi="28" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry>
wherein:
<DefinitionList id="dla01"><DefinedTerm>R</DefinedTerm><DefinitionDescription>Fis a perfluorinated alkyl group having 1 to 14 carbon atoms and terminally substituted with -F, -Cl, -OR, -OC₆F₅, -SR', -SO₂R', -SO₂F, -N₃, -CN or -C(O)OR', or said perfluorinated alkyl group also containing ether oxygen,</DefinitionDescription><DefinedTerm>R'</DefinedTerm><DefinitionDescription>is an alkyl group of 1 to 4 carbon atoms;</DefinitionDescription><DefinedTerm>R</DefinedTerm><DefinitionDescription>is an alkyl group of 1 to 4 carbon atoms, -CH₂CF₃ or -C₆H₅;</DefinitionDescription><DefinedTerm>Y</DefinedTerm><DefinitionDescription>is -H, -OR or -CF₂CF₂Z; and</DefinitionDescription><DefinedTerm>Z</DefinedTerm><DefinitionDescription>is -F, -N₃, -OC₆H₅, -SR' or -OC₆F₅;</DefinitionDescription></DefinitionList> comprising contacting at a temperature of from about -20°C to about 80°C a 2-chloro- or 2-bromoethyl fluoroalkyl carboxylate having the formula RFCO₂CH₂CH₂X with a compound of the formula MY¹ in a suitable solvent; wherein Y¹ is -H, -OR or -CF₂CF₂Z; X is -Cl or -Br, and M is Na, Li, K or NR'₄ .</p> |
