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CHINESE CHEMICAL LETTERS · 2013 · IF 1.21

Impregnated copper on magnetite as catalyst for the O-arylation of phenols with aryl halides

Ying-Peng Zhang,Ai-Hong Shi,Yun-Shang Yang,Chun-Lei Li

Nanoparticle Fe 3 O 4 encapsulated CuO, as a heterogeneous catalyst, is a facile system for the synthesis of diaryl ethers by the cross-coupling reaction of various substituted aryl halides with various substituted phenols, which avoids using any type of expensive ligand and can be recovered from the reaction mixture by using a simple magnet. Moreover, this catalyst can be reused three times with high catalytic activity.

研究领域: 化学 · 催化材料科学
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EUROPEAN JOURNAL OF ORGANIC CHEMISTRY · 2013 ·Vol. 2013 ·期 32 ·7411-7420 · IF 3.344

BF3·OEt2-Promoted Tandem O-Arylation/Hydroxylation: Efficient Synthesis of 2-Hydroxyflavanones from Triazenylaryl-Substituted Diketones

Zhengkai Chen,Weijun Yang,Lijun Xu,Lili Zhang,Maozhong Miao,Hongjun Ren

Graphical Highly substituted 2-hydroxyflavanones can be obtained through a tandem O -arylation/hydroxylation process from triazenylaryl-substituted diketones in the presence of a Lewis acid. A transition-metal-free tandem O -arylation/hydroxylation approach has been developed for the efficient synthesis of highly substituted 2-hydroxyflavanones from triazenylaryl-substituted diketones. The intermediate benzopyrylium cation may be involved in these reactions.

研究领域: 有机化学 · 药物化学
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