Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 39, Pages 12719-12722Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b08397
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Funding
- NIGMS [R01 GM100985]
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Here we report the development of a C(sp(3))-H cross-coupling platform enabled by the catalytic generation of Chlorine radicals by nickel and photoredox catalysis. Aryl chlorides serve as both cross-coupling partners and the chlorine radical source for the alpha-oxy C(sp(3))-H arylation of cyclic and acyclic ethers. Mechanistic studies suggest that photolysis of a Ni(III) aryl chloride intermediate, generated by photoredox-mediated single-electron oxidation, leads to elimination of a chlorine radical in what amounts to the sequential capture of two photons. Arylations of a benzylic C(sp(3))-H bond of toluene and a completely unactivated C(sp(3))-H bond of cyclohexane demonstrate the broad implications of this manifold for accomplishing numerous C(sp(3))-H bond functionalizations under exceptionally mild conditions.
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