Cross Coupling of Acyl and Aminyl Radicals: Direct Synthesis of Amides Catalyzed by Bu4NI with TBHP as an Oxidant
作者:Zhaojun Liu、Jie Zhang、Shulin Chen、Erbo Shi、Yuan Xu、Xiaobing Wan
DOI:10.1002/anie.201108763
日期:2012.3.26
A radical solution: A Bu4NI/tert‐butyl hydroperoxide (TBHP) catalyzed synthesis of amides through a cross‐coupling reaction between acyl and aminyl radicals is described. This method involves the combination of aldehyde CH bond functionalization and decarbonylation of N,N‐disubstituted formamides (see scheme). The cross‐coupling is metal‐free, has a wide substrate scope, operational simplicity, and
自由基溶液:描述了Bu 4 NI /叔丁基过氧化氢(TBHP)通过酰基和氨基自由基之间的交叉偶联反应催化的酰胺合成。该方法涉及醛CH键官能化和N,N-二取代甲酰胺的脱羰作用的组合(请参见方案)。交叉耦合是无金属的,具有广泛的基片范围,操作简便,并且按比例放大可提供高产量。
Nitroxide‐Catalyzed Oxidative Amidation of Aldehydes to Yield
<i>N</i>
‐Acyl Azoles Using Sodium Persulfate
作者:Fabrizio Politano、Arturo León Sandoval、Mason L. Witko、Katrina E. Doherty、Chelsea M. Schroeder、Nicholas E. Leadbeater
DOI:10.1002/ejoc.202101239
日期:2022.1.27
In the presence of a catalytic quantity of a nitroxide salt, sodium persulfate can be used for the oxidative amidation of aldehydes to yield acyl azoles.
在催化量的氮氧化物盐存在下,过硫酸钠可用于醛的氧化酰胺化以产生酰基唑。
Oxidative functionalisation of alcohols and aldehydes via the merger of oxoammonium cations and photoredox catalysis
作者:Jyoti Nandi、John M. Ovian、Christopher B. Kelly、Nicholas E. Leadbeater
DOI:10.1039/c7ob02243c
日期:——
new paradigm for nitroxyl-mediated processes via the merger of oxoammonium cation-mediated oxidation with visible-light photoredox catalysis. The integration of these two forms of catalysis has been realised for the oxidative amidation of aldehydes, furnishing N-acylated heterocycles. Extension of this process to the oxidative amidation of alcohols via the intermediacy of an aldehyde was successfully
Nickel-catalyzed reductive defunctionalization of esters and amides to aromatic hydrocarbons
作者:Manoj Mondal、Pankaj Bharali
DOI:10.1039/c7nj02488f
日期:——
The removal of ester and amide groups is of fundamental significance in organic syntheses. Under non-catalytic conditions, hydride sources are chiefly used for their reduction. Recently developed Ni-catalyzed one-pot reductive activation of esters and amides followed by tandem C–CO bond cleavage–decarbonylation facilitates their cleavage to aromatic hydrocarbons. Isolation and characterization of key
Solvent- and additive-free oxidative amidation of aldehydes using a recyclable oxoammonium salt
作者:Arturo León Sandoval、Katrina E. Doherty、Geoffrey P. Wadey、Nicholas E. Leadbeater
DOI:10.1039/d2ob00307d
日期:——
and aliphatic aldehydes by means of an oxidative amidation reaction. The methodology employs a substoichiometric quantity of an oxoammoniumsalt as the oxidant. It avoids the need for additives such as a base, is run solvent-free, and the oxoammoniumsalt is recyclable.