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dissolved in ether (500 ml). The filtrate is
washed with aqueous NaHCO
3
and water, and
dried over CaSO
4
. The product is obtained by
distillation under reduced pressure.
A.5 Indirect Electrosynthesis
Using a Mediator
Ketone synthesis by indirect anodic oxidation
of alcohol using iodine
mediator [6]
The cation species of iodine is generated by
anodic oxidation of iodide ions and is used for
the oxidation of alcohol to give a ketone product
and recovery of iodide ions. The reaction can be
mediated by a catalytic amount of iodide
without metal oxide (
Eq. A.4
).
In an electrolytic cell, an aqueous solution (15
ml) of potassium iodide (2.49 g, 0.015 mol) and
alcohol (0.06 mol) is produced. Constant
current electrolysis using platinum or carbon
anode is conducted for 4-15 F mol
−1
of
electricity. The organic layer is separated and
the water layer is extracted with diethyl ether.
The combined organic phase is washed with
aqueous Na
2
S
2
O
3
. The product is purified by
distillation.
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