Electrochemical reduction of N-(2-nitro-4-R-phenyl)pyridinium salts using redox-mediators
| Autor: | A. A. Sokolov, Mikhail A. Syroeshkin, L. V. Mikhal’chenko, V. P. Gul'tyai, R. S. Begunov, M. Yu. Leonova |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
010405 organic chemistry Chemistry Inorganic chemistry Vanadium chemistry.chemical_element General Chemistry 010402 general chemistry Electrochemistry Electrosynthesis 01 natural sciences Redox 0104 chemical sciences Catalysis chemistry.chemical_compound Polymer chemistry Nitro Pyridinium |
| Zdroj: | Russian Chemical Bulletin. 65:209-214 |
| ISSN: | 1573-9171 1066-5285 |
| DOI: | 10.1007/s11172-016-1286-2 |
| Popis: | 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 products, viz., substituted pyrido[1,2-a]benzimidazoles, in high yield. The influence of the mediator nature and its amount, current density, temperature, cathode material, medium acidity, and the substrate structure on the efficiency of reductive heterocyclization of N-(2-nitroaryl)pyridinium salts was studied. |
| Databáze: | OpenAIRE |
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