Kinetic Study on Aminolysis of 2-Chloro-4-nitrophenyl X-Substituted-Benzoates in Acetonitrile and in H2O Containing 20 mol % DMSO: Effects of Medium and Substituent X on Reactivity and Reaction Mechanism
Metal-free one-pot synthesis of amides using graphene oxide as an efficient catalyst
作者:Shweta Kumari、Amiya Shekhar、Harshal P. Mungse、Om P. Khatri、Devendra D. Pathak
DOI:10.1039/c4ra07589g
日期:——
various structural defects, was found to be a highly efficient and cost effective carbocatalyst for the one-pot base-free synthesis of amides from aromatic aldehydes and secondary amine. The chemical and structural features of GO, as probed by FTIR, Raman, XRD and HRTEM analyses, were discussed to understand the catalytic mechanism for the synthesis of amides. The present method obviates the use of transition
Aerobic Oxidative Amidation of Aromatic and Cinnamic Aldehydes with Secondary Amines by CuI/2-Pyridonate Catalytic System
作者:Mingwen Zhu、Ken-ichi Fujita、Ryohei Yamaguchi
DOI:10.1021/jo301553v
日期:2012.10.19
A simple and convenient CuI/2-pyridonate catalytic system for the oxidative amidation of aldehydes with secondary amines has been developed. With this system, a variety of useful arylamides have been synthesized in moderate to good yields in the presence of small amount of copper catalyst and the pyridonate ligand, generating only water as a coproduct. Synthesis of cinnamamides was also achieved by
Gold-catalyzed amide synthesis from aldehydes and amines in aqueous medium
作者:Gai-Li Li、Karen Ka-Yan Kung、Man-Kin Wong
DOI:10.1039/c2cc17689k
日期:——
An efficient gold-catalyzed amide synthesis from aldehydes and amines in aqueousmedium under mild reaction conditions has been developed.
在温和的反应条件下,由醛和胺在水性介质中有效合成金催化的酰胺已得到开发。
Synthesis of Ag/g-C<sub>3</sub>
N<sub>4</sub>
Composite as Highly Efficient Visible-Light Photocatalyst for Oxidative Amidation of Aromatic Aldehydes
作者:Lingling Wang、Min Yu、Chaolong Wu、Nan Deng、Chao Wang、Xiaoquan Yao
DOI:10.1002/adsc.201600138
日期:2016.8.18
resonance (LSPR) effect of Ag NPs exhibited high photocatalytic activities toward aerobic oxidative amidation of aromatic aldehydes under visiblelight irradiation. Good to excellent yields were achieved for various substrates under the light of a 25 W compact fluorescent light (CFL) bulb in air. The operationally easy procedure provides an economical, green, and mild alternative for the formation
在此贡献中,合成了Ag / g-C 3 N 4纳米复合材料,并用作可见光照射下有机反应的高效绿色光催化剂。经过改良的溶剂热焙烧工艺,以三聚氰胺和氰尿酰氯为前体,合成了层状多孔g-C 3 N 4。银纳米颗粒(NPs)可以很好地固定在g-C 3 N 4纳米片上,该片是通过简便的浸渍-焙烧方法制备的。廉价,稳定的g‐C 3 N 4Ag NPs的局部表面等离子体激元共振(LSPR)效应对可见光辐照下芳香醛的需氧氧化酰胺化表现出很高的光催化活性。在空气中使用25 W紧凑型荧光灯(CFL)灯泡的情况下,各种基板的良率都达到了很好的水平。操作简便的程序为形成酰胺键提供了一种经济,绿色和温和的替代方法。
Comparison of Aminolysis of 2-Pyridyl and 4-Pyridyl X-Substituted Benzoates in Acetonitrile: Evidence for a Concerted Mechanism Involving a Cyclic Transition State
作者:Ik-Hwan Um、Ae-Ri Bae、Tae-Il Um
DOI:10.1021/jo402629e
日期:2014.2.7
but rather by resonance stabilization of substrates possessing an electron-donating group (EDG) in the benzoyl moiety. The Brønsted-type plots are linear with βnuc = 0.59 ± 0.02, which is typical of reactions reported to proceed through a concerted mechanism. A cyclic transition state (TS), which forces the reaction to proceed through a concerted mechanism, is proposed. The deuterium kinetic isotope