Iodine/Visible Light Photocatalysis for Activation of Alkynes for Electrophilic Cyclization Reactions
Iodine/Visible Light Photocatalysis for Activation of Alkynes for Electrophilic Cyclization Reactions
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碘/可见光光催化活化炔烃进行亲电环化反应
DOI:
10.1021/acscatal.7b00799
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发表时间:
2017-05
期刊:
影响因子:
12.9
通讯作者:
Wang Yifeng
中科院分区:
文献类型:
--
作者:
Liu Yuliang;Wang Bin;Qiao Xiaofeng;Tung Chen-Ho;Wang Yifeng
Photocatalytic organic synthesis needs photocatalysts to initiate the reactions and to control the reaction paths. Available photocatalytic systems rely on electron transfer or energy transfer between the photoexcited catalysts and the substrates. We explore a concept based on the photopromoted catalyst coupling to the substrate and the phototriggered catalyst regeneration by elimination from the catalytic cycle. A catalytic amount of elementary I2 is applied as both a visible light photocatalyst and a π Lewis acid, enabling the direct activation of alkyne C≡C bonds for electrophilic cyclization reactions, one of the most important reactions of alkynes. Visible light is crucial for both the iodocyclization of the propargyl amide and the deiodination of the intermediate. Singlet oxygen is found to play a key role in the regeneration of I2. This system shows good functional group compatibility for the generation of substituted oxazole aldehydes and indole aldehydes. Hence, this study provides a readily acce...
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影响因子:
15
作者:
Peng, Haihui;Akhmedov, Novruz G.;Shi, Xiaodong
通讯作者:
Shi, Xiaodong
影响因子:
9.1
作者:
Peng Guo;Junhai Huang;Qingchun Huang;X. Qian
通讯作者:
Peng Guo;Junhai Huang;Qingchun Huang;X. Qian
影响因子:
11.4
作者:
Meiqing Hu;Y. Wang;Z. Xiong;Dongqin Bi;Yuhong Zhang;Yiming Xu
通讯作者:
Meiqing Hu;Y. Wang;Z. Xiong;Dongqin Bi;Yuhong Zhang;Yiming Xu
DOI:
10.1021/jo5001719
发表时间:
2014-03
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
Yancheng Hu;Ruxia Yi;Chunxiang Wang;Xiaoyi Xin;Fan Wu;B. Wan
通讯作者:
Yancheng Hu;Ruxia Yi;Chunxiang Wang;Xiaoyi Xin;Fan Wu;B. Wan
影响因子:
21.8
作者:
Yoon, Tehshik P.;Ischay, Michael A.;Du, Juana
通讯作者:
Du, Juana