Zhou Y, Huang H. Fluoroalkylative Ketonization of Malononitrile-Tethered Alkenes via Nickel Electron-Shuttle and Lewis Acid Catalysis.
Org Lett 2024;
26:4532-4536. [PMID:
38771933 DOI:
10.1021/acs.orglett.4c01415]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
A binary Ni/Eu catalytic system has been developed, which enables an efficient reductive dicarbofunctionalization of unactivated alkenes with alkyl halides and malononitriles. The combination of Ni electron-shuttle catalysis with Eu(OTf)3, a non-redox-type Lewis acid, effectively activates the iminyl radicals, enabling the direct formation of the C(sp3)-C(sp3) bond and β-ketonitrile functionality across a variety of C═C double bonds. This reaction allows for the expedient synthesis of densely functionalized cyclic β-ketonitriles bearing all-carbon quaternary centers.
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