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2016 ; 374
(3
): 30
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Proton-Coupled Electron Transfer in Organic Synthesis: Fundamentals,
Applications, and Opportunities
#MMPMID27573270
Miller DC
; Tarantino KT
; Knowles RR
Top Curr Chem (Cham)
2016[Jun]; 374
(3
): 30
PMID27573270
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Proton-coupled electron transfers (PCETs) are unconventional redox processes in
which both protons and electrons are exchanged, often in a concerted elementary
step. While PCET is now recognized to play a central a role in biological redox
catalysis and inorganic energy conversion technologies, its applications in
organic synthesis are only beginning to be explored. In this chapter, we aim to
highlight the origins, development, and evolution of the PCET processes most
relevant to applications in organic synthesis. Particular emphasis is given to
the ability of PCET to serve as a non-classical mechanism for homolytic bond
activation that is complimentary to more traditional hydrogen atom transfer
processes, enabling the direct generation of valuable organic radical
intermediates directly from their native functional group precursors under
comparatively mild catalytic conditions. The synthetically advantageous features
of PCET reactivity are described in detail, along with examples from the
literature describing the PCET activation of common organic functional groups.