Abstract
The fluorosulphonyl perfluorocyclohexane carbonyl fluorides 1,4 FOC·C 6F 10·SO 2F(I) and 1,2 FOC·C 6F 10·SO 2F(II) have been synthesised [1] by direct fluorination of respectively 1,4 FOC·C 6F 4·SO 2F(III) and 1,2 FOC·C 6F 4·S0 2F(IV). The use of elemental fluorine for the fluorination of aromatic compounds is usually unsuccessful, even under very carefully controlled conditions, producing mainly oligomers and polymeric tars [2]. However, fluorination of 1,4 FOC·C 6F 4·SO 2F(III) [1,3] in CCl 2F·CClF 2 with F 2/N 2 at ambient temperatures gave 1,4 FCO·C 6F 10·SO 2F(I), together with C 6F 11·COF(V) and oligomers. ▪ This novel difunctional perfluorocyclohexane has been characterised by reaction with alcohols and amines, where the different reactivities of the acid fluoride groups allows derivatives to be prepared on the carbonyl fluoride, leaving the sulphonyl fluoride intact.
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