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Light‐Promoted Minisci Coupling Reaction of Ethers and Aza Aromatics Catalyzed by Au/TiO 2 Heterogeneous Photocatalyst
Author(s) -
Li Zhanchong,
Wu Liangying,
Guo Jiabao,
Shao Yifei,
Song Yang,
Ding Yuzhou,
Zhu Li,
Yao Xiaoquan
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202100298
Subject(s) - photocatalysis , catalysis , materials science , titanium dioxide , nanocomposite , anatase , heteroatom , nanoparticle , photochemistry , chemical engineering , nanotechnology , chemistry , organic chemistry , composite material , ring (chemistry) , engineering
In this paper, Au/TiO 2 nanocomposite was synthesized and utilized as highly efficient and green photocatalyst for organic reactions. A sheet‐like anatase titanium dioxide material with a highly active (001) crystal plane was prepared via a solvothermal method. Gold nanoparticles were then loaded on the surface of TiO 2 by a liquid‐phase reduction method to give an Au/TiO 2 material with good photocatalytic activity. The Au/TiO 2 nanocomposite was utilized as a photocatalyst to develop a light‐promoted Minisci oxidative coupling reaction of ether and aza aromatics by using oxygen as green oxidant and only catalytic amount of acid as additive. The protocol shows a good functional group tolerance as well as good to excellent yields for various substrates. With mechanistic studies, Au/TiO 2 nanocomposite proved to be an efficient photocatalyst to activate C−H bond via a SEO approach of heteroatoms. Moreover, the solid semiconductor photocatalyst shows good recycling performance, could be easily recovered and reused without significant decrease in yield.