Late-Stage <i>N</i>-Me Selective Arylation of Trialkylamines Enabled by Ni/Photoredox Dual Catalysis
作者:Yangyang Shen、Tomislav Rovis
DOI:10.1021/jacs.1c08157
日期:2021.10.13
The diversity and wide availability of trialkylamines render them ideal sources for rapid construction of complex amine architectures. Herein, we report that a nickel/photoredox dual catalysis strategy affects site-selective α-arylation of various trialkylamines. Our catalytic system shows exclusive N-Me selectivity with a wide range of trialkylamines under mild conditions, even in the context of late-stage
<i>tert</i>
-Butoxy-Radical-Promoted α-Arylation of Alkylamines with Aryl Halides
作者:Ryota Ueno、Yuko Ikeda、Eiji Shirakawa
DOI:10.1002/ejoc.201700548
日期:2017.8.2
In the presence of a tert-butoxy radical precursor, the reaction of alkylamines with aryl halides was found to give alpha-arylated alkylamines through homolytic aromaticsubstitution of the halogen atoms.
α-arylation with sulfonylarenes having an azole, azine, and benzenenucleus. The α-arylation was scaled up using an electrolysis flow cell. Mechanistic studies show that anodic oxidation of an alkylamine with a sulfinate as a mediator followed by deprotonation gives an α-aminoalkyl radical, which undergoes homolytic aromatic substitution (HAS) on a sulfonylarene to give the corresponding α-arylalkylamine