Organic Electrosynthesis - Fundamentals and Applications of Organic Electrochemistry - page 246

is effective to solve the problem, but product
separation becomes complicated. Fuchigami
and co-workers have developed a novel indirect
anodic fluorination system employing a
task-specific ionic liquid with an iodoarene
moiety as the mediator in HF salts [65]. The
mediator improved the reaction efficiency for a
variety of electrochemical fluorinations ( Figure
6.23 ) and remained intact in the ionic liquids
after the product extraction process for reuse in
subsequent runs.
Figure 6.23 Electrochemical fluorination
using task-specific ionic liquid with mediator
In addition, a polymer-supported iodobenzene
(PSIB) mediator is also effective for indirect
anodic fluorination in HF salts [66]. In this
case, the iodobenzene moiety pendent from the
solid polymer support cannot be directly
oxidized, therefore a double mediator system is
necessary. As shown in Figure 6.24 , anodic
oxidation of Cl − gave Cl + , which reacted with