已经研究了取代的吡啶并[1,2- a ]苯并咪唑对亲电子芳族取代的反应性。发现并研究了相对于吸电子基团在邻位不寻常地引入亲电子物质。将取代基的性质从间位元键更改为邻位/对位键不会改变亲电取代基的选择性。质子和碳光谱S的产品的分配ë氩反应进行了使用一维和二维NMR和选定的硝基-和dinitropyrido的结构[1,2一]苯并咪唑通过单晶X-射线衍射证实。
Electrochemical reduction of N-(2-nitro-4-R-phenyl)pyridinium salts using redox-mediators
作者:A. A. Sokolov、R. S. Begunov、M. A. Syroeshkin、L. V. Mikhal’chenko、M. Yu. Leonova、V. P. Gul’tyai
DOI:10.1007/s11172-016-1286-2
日期:2016.1
Electrochemical reduction of N-(2-nitroaryl)pyridinium chlorides was accomplished in acidic aqueous alcoholic medium in the galvanostatic mode using tin, titanium, vanadium, and iron chlorides as redox-mediators. The use of SnCl2 as a mediator catalyst made it possible to shorten the electrosynthesis time as compared to the direct electroreduction on an electrode and prepare the intramolecular cyclization
Effect of temperature and the nature of protonating agent on reduction of N-(2-nitroaryl)pyridinium chlorides
作者:R. S. Begunov、A. A. Sokolov、A. A. Sazhina
DOI:10.1134/s1070428015080266
日期:2015.8
Effect of reducer’s nature on the reduction of N-(2-nitrophenyl)pyridinium chlorides
作者:R. S. Begunov、A. A. Sokolov、T. V. Shebunina
DOI:10.1134/s1070428013050291
日期:2013.5
Synthesis of Pyrido[1,2-a]benzimidazoles by Electroreductive Heterocyclization of 1-(2-nitroaryl)pyridinium Chlorides
作者:Aleksandr A. Sokolov、Mikhail A. Syroeshkin、Roman S. Begunov、Nadezhda N. Rusakova、Vadim P. Gultyai
DOI:10.1016/j.mencom.2012.11.011
日期:2012.11
The electrochemical reduction of N-(2-nitro-4-R-phenyl)pyridinium chlorides (R = CF3, CN, CO2Et) at a lead cathode in HCl/(PrOH)-O-i/H2O affords the corresponding 7-R-pyrido[1,2-a]benzimidazoles in 70-94% yields.
Simple synthesis of substituted benzo[4,5]imidazo[1,2-a]pyridines