Chen DD, Zhang SL. Dual Oxidation of Epoxides with a High-Valent Cu(III)-CF
3 Compound and DMSO to Access 1,2-Diketones.
J Org Chem 2023. [PMID:
38050841 DOI:
10.1021/acs.joc.3c01160]
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Abstract
This study reports sequential dehydrogenation and transfer oxygenation of 1,2-diarylepoxides by high-valent phenCu(III)(CF3)3 and DMSO to produce 1,2-diketones. The Cu(III)-CF3 compound serves as a CF3 radical source to abstract the hydrogen atom of the epoxide ring. The resulting ether α-carbon radical undergoes ring-opening rearrangement to give a ketone α-carbon radical intermediate, which is oxygenated by DMSO with the release of Me2S. The combination of a Cu(III)-CF3 compound and DMSO may be exploited to develop other novel oxidation reactions.
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