Efficient electrochemical synthesis of pyrido[1,2-a]benzimidazoles
作者:A. A. Sokolov、M. A. Syroeshkin、V. N. Solkan、T. V. Shebunina、R. S. Begunov、L. V. Mikhal’chenko、M. Yu. Leonova、V. P. Gultyai
DOI:10.1007/s11172-014-0440-y
日期:2014.2
Electrochemical reduction of N-(2-nitroaryl)pyridinium chlorides in alcohol—dilute HCl mixtures gave pyrido[1,2-a]benzimidazoles in high yields in both divided and undivided cells. According to cyclic voltammetry measurements and DFT calculations (B3LYP/6-31+G(d)), the reaction involves intermediate formation of the corresponding hydroxylamine derivative followed by its heterocyclization.
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
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