An Oxidant-Free Strategy for Indole Synthesis via Intramolecular C–C Bond Construction under Visible Light Irradiation: Cross-Coupling Hydrogen Evolution Reaction
作者:Cheng-Juan Wu、Qing-Yuan Meng、Tao Lei、Jian-Ji Zhong、Wen-Qiang Liu、Lei-Min Zhao、Zhi-Jun Li、Bin Chen、Chen-Ho Tung、Li-Zhu Wu
DOI:10.1021/acscatal.6b00917
日期:2016.7.1
We describe here an oxidant-free strategy to synthesize indoles, i.e., under visible-light irradiation (λ = 450 nm), catalytic amounts of an iridium(III) photosensitizer and cobaloxime catalyst transform various N-aryl enamines exclusively into indoles. Our methodology affords indoles in good to excellent yields under mild reaction conditions and produces H2 as the only byproduct. Spectroscopic and
我们在这里描述了一种无氧化剂的合成吲哚的策略,即在可见光辐射(λ= 450 nm)下,催化量的铱(III)光敏剂和钴肟催化剂将各种N-芳基烯胺专门转化为吲哚。我们的方法在温和的反应条件下,吲哚类化合物的收率高至优,并产生H 2作为唯一的副产物。光谱和电化学研究证实,所设计的系统是通过可见光催化的N-芳基烯胺的氧化,然后进行分子内自由基加成,在环境条件下平稳生成吲哚而进行的。