Abstract
Direct reductive transformation of triphenylphosphine oxide to
triphenylphosphine was performed successfully by electrolysis with
TMSCl in an acetonitrile/Bu4 NBr/(Zn
anode)-(Pt cathode)/undivided cell/constant
current electrolysis system. A plausible ECEC mechanism involving
the formation of silylated phosphorus radical is proposed.
Key words
reduction - electron transfer - phosphorus - silicon
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oxide 2 (d = 26.2 ppm in MeCN)
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the corresponding phosphine oxides in 58%, 74%,
and 78% yield, respectively.
