Synthesis of α-Ketoamides from Aryl Methyl Ketones and N,N-Dimethylformamide via Copper-Catalyzed Aerobic Oxidative Coupling
作者:Qiuling Song、Mingxin Zhou
DOI:10.1055/s-0033-1339109
日期:——
Abstract A copper-catalyzedaerobicoxidativecoupling of aryl methyl ketones with N,N-dimethylformamide was developed, which afforded α-ketoamides by a sequence of dioxygen activation, C–H bond functionalization, and amide formation with N,N-dimethylformamide as the nitrogen source. Molecular oxygen was found to play a crucial role in this transformation. A copper-catalyzedaerobicoxidativecoupling of aryl
Copper-Catalyzed Oxidative Synthesis of α-Ketoamides from Aryl Methyl Ketones and N-Bromobutanimide Using N,N-Dimethylformamide as Dimethylamine Source
作者:Ying Wei、Yongxia Yan、Xiaoyan Li
DOI:10.1055/s-0039-1691568
日期:2020.3
A novel and practical Cu(OAc)2-catalyzed oxidative synthesis of α-ketoamides from arylmethylketones and N-bromobutanimide (NBS) using N,N-dimethylformamide (DMF) as dimethylamine (HNMe2) source and solvent has been developed under mild conditions. DMF was used as a HNMe2 source and can be easily converted into HNMe2 by acid hydrolysis. The mechanistic studies indicate that Cu(OAc)2 plays a dual role
Copper-catalyzed oxidative condensation of α-oxocarboxylic acids with formamides: synthesis of α-ketoamides
作者:Hua Wang、Li-Na Guo、Xin-Hua Duan
DOI:10.1039/c3ob40787j
日期:——
A copper-catalyzed coupling of α-oxocarboxylic acids with formamides is reported. This simple method provides a practical approach toward the synthesis of α-ketoamides with a variety of functional groups. Mechanistic studies have shown that the reaction proceeded via a radical process and 13C-labeled experiments proved that the amide carbon in the products comes from the corresponding carboxylic acid, not from the DMF.
An unprecedented approach toward the general synthesis of α-keto amides has been established by tailoring the CC double bond of enaminones in the presence of CuI and hypervalent iodine.
已通过在CuI和高价碘存在下调整烯胺酮的C=C双键,建立了合成α-酮酰胺的前所未有方法。
Metal-Free C=C Double Bond Cleavage on Enaminones for the Synthesis of α-Ketoamides by Free-Radical Aerobic Oxygenation
作者:Yiming Yang、Guofeng Zhong、Junfen Fan、Yunyun Liu
DOI:10.1002/ejoc.201900660
日期:2019.7.23
The metal‐free cleavage of the enaminone C=C double bond providing α‐ketoamides has been realized by the BPO/NIS‐initiated freeradical cascade reactions. Isotopic labelling experiment confirms that air is the oxygen source in these reactions involving new carbonyl group formation.