Photocatalyst-controlled and visible light-enabled selective oxidation of pyridinium salts
作者:Xiang-Jun Peng、Hai-Ping He、Qian Liu、Kun She、Bao-Qi Zhang、Heng-Shan Wang、Hai-Tao Tang、Ying-Ming Pan
DOI:10.1007/s11426-020-9958-6
日期:2021.5
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
这项研究提出了两种不同的方法,以空气为末端氧化剂,可光催化控制和可见光诱导的吡啶鎓的选择性氧化。这些转变的关键是选择合适的光源和光催化剂。吡啶鎓通过氧介导的环加成,质子偶联电子转移(PCET),吡啶开环和再循环成功地转化为吡咯。另一途径是吡啶鎓在钴(II)的催化下通过自由基重排/好氧氧化选择性地形成4-羰基吡啶。