Coupling of Methyl Ketones and Primary or Secondary Amines Leading to α-Ketoamides
作者:Wei Wei、Ying Shao、Huayou Hu、Feng Zhang、Chao Zhang、Yuan Xu、Xiaobing Wan
DOI:10.1021/jo301117b
日期:2012.9.7
A metal-free oxidative coupling of methyl ketones and primary or secondary amines to α-ketoamides has been developed. Four intermediates, α-iodoketone, α-aminoketone, iminium intermediate, and α-hydroxy amine have been identified through a series of control experiments. The atom-economic methodology can be scaled-up, tolerates a variety of functional groups, and is operationally simple.
A simple and practical method for α-ketoamide synthesis via a decarboxylative strategy of isocyanates with α-oxocarboxylic acids is described. The reaction proceeds at room temperature under mild conditions without an oxidant or an additive, showing good substrate scope and functional compatibility. Moreover, the applicability of this method was further demonstrated by the synthesis of various bioactive
One pot synthesis of α-ketoamides from ethylarenes and amines: a metal free difunctionalization strategy
作者:Mani Ramanathan、Chun-Kai Kuo、Shiuh-Tzung Liu
DOI:10.1039/c6ob02361d
日期:——
One-pot and metalfreesynthesis of α-ketoamides has been described through in situ generation of aryl ketones from easily available ethylarenes followed by amidation with various amines. This multiple oxidation protocol involves catalytic I2–pyridine–TBHP (t-butyl hydroperoxide) mediated oxidative benzylic carbonylation and sequential NaI–TBHP mediated oxidative amidation without using any solvent
Visible‐Light Mediated Photooxidative Synthesis of α‐Keto Amides
作者:Aparna Monga、Amar Prakash Pandey、Anuj Sharma
DOI:10.1002/adsc.201900279
日期:2019.8.5
Photocatalytic amidation of α‐keto aldehydes is herein investigated. This transformation was achieved using rose bengal as photocatalyst at room temperature under ambient air and under irradiation of a 20 W white LED bulb. The method is mild, efficient and environmentally benign. This photocatalytic method is compatible with different unsubstituted and substituted α‐keto aldehydes having electron‐withdrawing
The syntheses of α-ketoamides via<sup>n</sup>Bu<sub>4</sub>NI-catalyzed multiple sp<sup>3</sup>C–H bond oxidation of ethylarenes and sequential coupling with dialkylformamides
作者:Bingnan Du、Bo Jin、Peipei Sun
DOI:10.1039/c4ob00520a
日期:——
The nBu4NI-catalyzed sequential C–O and C–N bond formation via multiple sp3C–H bond activation of ethylarenes, using N,N-dialkylformamide as the amino source, provided α-ketoamides with moderate yields.
所述Ñ卜4 NI -催化的顺序C-O和C-N键的形成通过多个SP 3 C-H键活化ethylarenes,采用Ñ,Ñ -dialkylformamide作为氨基源,提供α酮酰胺具有中等产率。