γ C-H Functionalization of Amines via Triple H-Atom Transfer of a Vinyl Sulfonyl Radical Chaperone.
γ C-H Functionalization of Amines via Triple H-Atom Transfer of a Vinyl Sulfonyl Radical Chaperone.
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DOI:
10.1021/jacs.2c05266
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发表时间:
2022-07-27
影响因子:
15
通讯作者:
Nagib, David A.
中科院分区:
文献类型:
--
作者:
Herbort, James H.;Bednar, Taylor N.;Chen, Andrew D.;RajanBabu, T. V.;Nagib, David A.
A selective, remote desaturation has been developed to rapidly access homoallyl amines from their aliphatic precursors. The strategy employs a triple H-atom transfer (HAT) cascade, entailing (i) cobalt-catalyzed metal-HAT (MHAT), (ii) carbon-to-carbon 1,6-HAT, and (iii) Co-H regeneration via MHAT. A new class of sulfonyl radical chaperone – to rapidly access and direct remote, radical reactivity – enables remote desaturation of diverse amines, amino acids, and peptides with excellent site-, chemo-, and regio- selectivity. The key, enabling C-to-C HAT step in this cascade was computationally designed to satisfy thermodynamic (bond strength) and kinetic (polarity) requirements, and it has been probed via regioselectivity, isomerization, and competition experiments. We have also interrupted this radical transfer dehydrogenation to achieve a family of γ-selective C-Cl, C-CN, and C-N bond formations.
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