Copper-Catalyzed para-Selective C–H Amination of Electron-Rich Arenes
摘要:
A one-pot two-step method for para-selective C-H amination of carbocyclic arenes comprises the in situ formation of unsymmetrical diaryl-lambda(3)-iodanes followed by their Cu(I)-catalyzed reaction with a range of N-unprotected amines.
Practical Catalytic Cleavage of C(sp
<sup>3</sup>
)−C(sp
<sup>3</sup>
) Bonds in Amines
作者:Wu Li、Weiping Liu、David K. Leonard、Jabor Rabeah、Kathrin Junge、Angelika Brückner、Matthias Beller
DOI:10.1002/anie.201903019
日期:2019.7.29
The selective cleavage of thermodynamically stable C(sp3)−C(sp3) single bonds is rare compared to their ubiquitous formation. Herein, we describe a general methodology for such transformations using homogeneous copper‐based catalysts in the presence of air. The utility of this novel methodology is demonstrated for Cα−Cβ bond scission in >70 amines with excellent functional group tolerance. This transformation
Visible‐Light‐Mediated Aerobic Oxidative C(
<i>sp</i>
<sup>
<i>3</i>
</sup>
)−C(
<i>sp</i>
<sup>
<i>3</i>
</sup>
) Bond Cleavage of Morpholine Derivatives Using 4CzIPN as a Photocatalyst
作者:Chun‐Lin Dong、Lan‐Qian Huang、Zhi Guan、Chu‐Sheng Huang、Yan‐Hong He
DOI:10.1002/adsc.202100455
日期:2021.8.3
Herein, a metal-free strategy for the aerobic oxidative cleavage of the inert C(sp3)−C(sp3) bond was developed. Deconstruction of morpholine derivatives was conducted using visible light as an energy source and O2 as an oxidant under mild conditions. This procedure demonstrated suitable selectivity and functional group tolerance. Moreover, a possible mechanism involving a radical process was proposed
CatalyticSNAr reaction of non-activated fluoroarenes with amines viaRuη6-arene complexes
作者:Maiko Otsuka、Kohei Endo、Takanori Shibata
DOI:10.1039/b919413d
日期:——
Ru-catalyzed SNAr reaction of non-activated fluoroarenes with secondary amines proceeded through η6-arene complexes to give aminated products in up to 79% yield.