Aromatization of Enamines Promoted by a Catalytic Amount of Pd/C. Synthesis of Aromatic Amines
摘要:
[GRAPHICS]Aromatic amines were obtained efficiently from enamines by using a catalytic amount of Pd/C in the presence of nitrobenzene and 4 Angstrom molecular sieves in refluxing toluene.
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
Selective electrochemical <i>para</i>-thiocyanation of aromatic amines under metal-, oxidant- and exogenous-electrolyte-free conditions
作者:Ying Zhang、Huanjie Gao、Jiabao Guo、Hao Zhang、Xiaoquan Yao
DOI:10.1039/d1cc05208j
日期:——
An electrochemical oxidative para-C–H-thiocyanation of aromaticamines has been developed to construct thiocyanato aromatic compounds under metal-, oxidant-, and exogenous-electrolyte-free conditions in an undivided cell. The transformation is compatible with a range of primary, secondary, and tertiaryamines and shows good functional group tolerance. This approach provides an economical and environmentally
with amines proceeded under an ethylene atmosphere in the presence of a catalytic amount of palladium/carbon to afford a variety of arylamines in good to high yields. The present reaction was carried out under completely non‐aerobic conditions, and which is in contrast with the previously reported aerobic system. has wide applicability affording a variety of aromatic amines, and co‐product of the reaction