Accessing <i>N</i>-Acyl Azoles via Oxoammonium Salt-Mediated Oxidative Amidation
作者:John M. Ovian、Christopher B. Kelly、Vincent A. Pistritto、Nicholas E. Leadbeater
DOI:10.1021/acs.orglett.7b00060
日期:2017.3.17
An operationally simple, robust, metal-free approach to the synthesis of N-acyl azoles from both alcohols and aldehydes is described. Oxidative amidation is facilitated by a commercially available organic oxidant (4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate) and proceeds under very mild conditions for an array of structurally diverse substrates. Tandem reactions of these
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。
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.
Reductive cross-coupling of <i>N</i>-acyl pyrazole and nitroarene using tetrahydroxydiboron: synthesis of secondary amides
作者:Hayeon Moon、Sunwoo Lee
DOI:10.1039/d3ob01040f
日期:——
report on a new method for the synthesis of amidesusing acyl pyrazoles and nitroarenes under reducing conditions. It was found that acyl pyrazoles react with organo-nitro compounds in the presence of B2(OH)4, giving the corresponding amides in good yields. We demonstrated that benzoyl pyrazoles having various substituents and nitroarenes with different substituents can be used to produce a range of N-substituted
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