An eco-friendly and efficient electrochemical method for the synthesis of 5-amine-1,2,4-triazole derivatives has been developed by employing hydrazones or in situ generation of hydrazones with cyanamide using KI as the catalyst and electrolyte. This strategy could be smoothly conducted with simple reaction conditions at room temperature without the addition of a chemical oxidant in an undivided cell
From Dinitrogen to N‐Containing Organic Compounds: Using Li
<sub>2</sub>
CN
<sub>2</sub>
as a Synthon
作者:Li‐Jun Wu、Qianru Wang、Jianping Guo、Junnian Wei、Ping Chen、Zhenfeng Xi
DOI:10.1002/anie.202219298
日期:——
A strategy for the conversion of inert N2 into various nitrogen-containing organic compounds is presented. The activated N-containing species Li2CN2 is successfully prepared in high yields from N2 gas, C and LiH. Li2CN2 can be transformed into a range of N-containing organic compounds, including cyanamides, carbodiimides, N-aryl cyanamides and 1,2,4-triazole derivatives. 15N-labeled products, including
介绍了一种将惰性 N 2转化为各种含氮有机化合物的策略。活性含氮物质Li 2 CN 2成功地从N 2气体、C和LiH中以高产率制备。Li 2 CN 2可以转化为一系列含氮有机化合物,包括氰胺、碳二亚胺、N-芳基氰胺和1,2,4-三唑衍生物。还从15 N 2气体制备了 15 N-标记的产物,包括恶唑烷衍生物。
Highly Efficient Cyanoimidation of Aldehydes
作者:Ping Yin、Wen-Bo Ma、Yue Chen、Wen-Cai Huang、Yong Deng、Ling He
DOI:10.1021/ol902207h
日期:2009.12.3
Cyanoimidation of aldehydes using cyanamide as a nitrogen source and using NBS as an oxidant was achieved in high yields without the addition of a catalyst. The method has several advantages, including mild conditions, simple workflow, and inexpensive reagents. The reaction proceeds in a one-pot manner, giving rise to the formation of intermolecular C−N and C−O bonds. Subsequently, the substituted
Copper salt-catalyzed oxidative amination resulted in the formation of a novel series of triazole–spirodienone conjugates, 4-triazolyl-1-oxa-4-azaspiro[4,5]deca-6,9-dien-3,8-diones and 4-triazolyl-1-oxa-4-azaspiro[4,5]deca-6,9-dien-8-ones.