An I2/KI-mediated oxidative N–N bond formation reaction is described. This new and environmentally benign approach allows for the convenientsynthesis of a variety of 1,2,4-triazolo[1,5-a]pyridines and other 1,5-fused 1,2,4-triazoles from readily available N-aryl amidines in an efficient and scalable fashion.
描述了I 2 / KI介导的氧化N–N键的形成反应。这种新的对环境无害的方法可以方便地从容易获得的N-芳基合成各种1,2,4-三唑并[1,5- a ]吡啶和其他1,5-稠合的1,2,4-三唑efficient以高效和可扩展的方式。
A Convenient Synthesis of 1,5-Fused 1,2,4-Triazoles from N-Arylamidines via Chloramine-T Mediated Intramolecular Oxidative N–N Bond Formation
作者:Ashish Bhatt、Rajesh K. Singh、Ravi Kant、Bhupendra K. Sarma
DOI:10.1055/s-0037-1611906
日期:2019.10
substrates having different functionalities. A convenientsynthesis of 1,5-fused 1,2,4-triazoles from readily available N-arylamidines is reported. The reaction is efficiently promoted by chloramine-T to afford the desired products mostly in high yields and in relatively short time, through direct metal-free oxidative N−N bond formation. The mild nature of the synthesis and short reaction time are notable advantages
Trichloroisocyanuric acid-mediated synthesis of 1,5-fused 1,2,4-triazoles from N-heteroaryl benzamidines via intramolecular oxidative N–N bond formation
作者:Ashish Bhatt、Rajesh K. Singh、Bhupendra K. Sarma、Ravi Kant
DOI:10.1016/j.tetlet.2019.151026
日期:2019.9
A convenient synthesis of 1,5-fused 1,2,4-triazoles from readily available N-heteroaryl benzamidines is reported. The reaction is efficiently promoted by trichloroisocyanuric acid to afford the desired products, mostly in high yields and in relatively short time, through direct metal-free oxidative N-N bond formation. The mild nature of the synthesis and short reaction time are notable advantages of the developed protocol. This protocol is effective toward various substrates having different functionalities. (C) 2019 Elsevier Ltd. All rights reserved.