186
to afford HO
2
radical to form the corresponding phosphonate
radical
187
. Addition of this radical to alkyne
Scheme 78. Examples and mechanism for the C-P coupling
involving
H
-phosphonate and terminal alkyne
generated styrenic radical
188
. Subsequently, loss of
hydrogen radical leads to the formation of hydrogen peroxide
along with requisite product. The advantage of this protocol
includes the absence of additives, bases or toxic agents, neat
procedure for generation of photocatalyst, simple and cost
effective, environmentally friendly and easy recovery and
reusability of the catalyst.
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