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Furthermore, anodic fluorination of various
phenol derivatives can be performed in
Et
3
N-5HF using carbon fibre cloth as an anode
to form 4,4-difluorocyclohexadienone
derivatives in good yields (
Eq. 6.18
) [58].
(6.18)
Electrochemical fluorination of adamantanes is
also possible in Et
3
N-5HF. Mono-, di-, tri- and
tetrafluoroadamantanes were selectively
prepared from adamantanes by controlling
oxidation potentials, and the fluorine atoms
were introduced selectively at the tertiary
carbons, as shown in
Eq. 6.19
[59].
(6.19)
Anodic fluorination of cyclic ethers, lactones
and open-chain and cyclic carbonates can be
achieved by anodic oxidation of a mixture of a
large amount of the liquid substrate and a small
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