Visible-light-driven intramolecular xanthylation of remote unactivated C(sp3)-H bonds
GREEN SYNTHESIS AND CATALYSIS(2023)
摘要
Visible light-mediated site-specific C(sp3)-H xanthylation of amides has been accomplished using N-xanthylamides. The N-centered radicals generated by light initiation of N-xanthylamide substrates undergo 1,5-hydrogen atom transfer to form benzylic or alkyl radical intermediates under metal-and catalyst-free conditions. This method exhibits a broad substrate scope, high functional group tolerance, and high regioselectivity. Furthermore, this strategy provides straightforward access to a range of derivatives through the subsequent elaboration of the xanthate group.
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关键词
C -H functionalization,5 -Hydrogen atom transfer,Photocatalytic,Site -speci fic,Xanthylation
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