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
Electrochemical Synthesis of α-Ketoamides under Catalyst-, Oxidant-, and Electrolyte-Free Conditions
作者:Jin-Yang Chen、Hong-Yu Wu、Qing-Wen Gui、Xiao-Ran Han、Yan Wu、Kui Du、Zhong Cao、Ying-Wu Lin、Wei-Min He
DOI:10.1021/acs.orglett.0c00387
日期:2020.3.20
method for the preparation of α-ketoamides through the direct electrochemical amidation of α-ketoaldehydes and amines with innocuous hydrogen as the sole byproduct at ambient temperature was developed. The present reaction features clean and mild conditions, excellent functional-group tolerance, and high atom economy and scalability, enabling facile applications in pharmaceutical chemistry.
Selenium dioxide-mediated synthesis of α-ketoamides from arylglyoxals and secondary amines
作者:Arthur Y. Shaw、Christine R. Denning、Christopher Hulme
DOI:10.1016/j.tetlet.2012.05.136
日期:2012.8
A facile and expeditious synthetic approach for the synthesis of alpha-ketoamides 3 is described. A series of alpha-ketoamides 3 was synthesized via reaction of selenium dioxide-mediated oxidative amidation between arylglyoxals 1 and secondary amines 2, and accelerated with microwave irradiation. Our findings indicate that constrained amines, such as piperazine and piperidine exhibit higher conversions for this transformation. This reaction was explored by synthesizing a series of alpha-ketoamides 3 from various arylglyoxals 1 with cyclic and acyclic secondary amines 2. (C) 2012 Elsevier Ltd. All rights reserved.