Photocatalyst-controlled and visible light-enabled selective oxidation of pyridinium salts
| Autor: | Xiang-Jun Peng, Heng-Shan Wang, Hai-Tao Tang, Hai-Ping He, Kun She, Ying-Ming Pan, Qian Liu, Bao-Qi Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
010405 organic chemistry
chemistry.chemical_element General Chemistry 010402 general chemistry Photochemistry 01 natural sciences Cycloaddition 0104 chemical sciences Catalysis Electron transfer chemistry.chemical_compound chemistry Pyridine Photocatalysis Pyridinium Proton-coupled electron transfer Cobalt |
| Zdroj: | Science China Chemistry. 64:753-760 |
| ISSN: | 1869-1870 1674-7291 |
| Popis: | This study proposes two different methods of photocatalytic-controlled and visible light-induced selective oxidation of pyridiniums with air as the terminal oxidant. The key to these transformations is to choose the appropriate light source and photocatalyst. Pyridiniums are successfully converted into pyrroles through oxygen-mediated cycloaddition, proton-coupled electron transfer (PCET), pyridine ring opening, and recyclization. The other route is that pyridiniums selectively form 4-carbonyl pyridines through free radical rearrangement/aerobic oxidation under the catalysis of cobalt (II). |
| Databáze: | OpenAIRE |
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