Liu Xiubin, Qing Zhixing, Cheng Pi, Zheng Xinyu, Zeng Jianguo, Xie Hongqi
National and Provincial Union Engineering Research Center for the Veterinary Herbal Medicine Resources and Initiative, Hunan Agricultural University, Changsha 410128, China.
Hunan Co-Innovation Center for Utilization of Botanicals Functional Ingredients, Hunan Agricultural University, Changsha 410128, China.
Molecules. 2016 Dec 8;21(12):1690. doi: 10.3390/molecules21121690.
A metal-free visible-light photoredox-catalyzed intermolecular cyclization reaction of -2,4-dinitrophenyl oximes to phenanthridines was developed. In this study, the organic dye eosin Y and -Pr₂NEt were used as photocatalyst and terminal reductant, respectively. The oxime substrates were transformed into iminyl radical intermediates by single-electron reduction, which then underwent intermolecular homolytic aromatic substitution (HAS) reactions to give phenanthridine derivatives.
开发了一种无金属可见光光氧化还原催化的-2,4-二硝基苯肟分子间环化反应生成菲啶。在本研究中，有机染料曙红Y和二异丙基乙胺分别用作光催化剂和末端还原剂。肟底物通过单电子还原转化为亚胺基自由基中间体，然后进行分子间均裂芳香取代（HAS）反应生成菲啶衍生物。
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