Synthesis of copper nanoparticles supported on a microporous covalent triazine polymer: an efficient and reusable catalyst for O-arylation reaction
作者:Pillaiyar Puthiaraj、Wha-Seung Ahn
DOI:10.1039/c5cy01590a
日期:——
Cu NPs immobilized on a microporous covalent triazine polymer obtained by a cost-effective synthesis method were evaluated as a catalyst for Ullmann coupling of O-arylation.
Copper(I) Phenoxide Complexes in the Etherification of Aryl Halides
作者:Jesse W. Tye、Zhiqiang Weng、Ramesh Giri、John F. Hartwig
DOI:10.1002/anie.200902245
日期:2010.3.15
No copping out! Copper(I) phenoxidecomplexes containing chelating ligands (see picture), proposed intermediates in copper‐catalyzed etherification of arylhalides, have been synthesized and fully characterized. The kinetic and chemical competence of the isolated complexes are demonstrated for the synthesis of aryl phenyl ethers, and experiments provide evidence against mechanistic pathways involving
Palladium-Catalyzed Formal Cross-Coupling of Diaryl Ethers with Amines: Slicing the 4-<i>O</i>
-5 Linkage in Lignin Models
作者:Huiying Zeng、Dawei Cao、Zihang Qiu、Chao-Jun Li
DOI:10.1002/anie.201712211
日期:2018.3.26
ether bonds (α‐O‐4, β‐O‐4, and 4‐O‐5 linkages) and other C−C bonds. Among the ether bonds, the bond dissociation energy of the 4‐O‐5 linkage is the highest and the most challenging to cleave. To date, 4‐O‐5 ether linkage model compounds have been cleaved to obtain phenol, cyclohexane, cyclohexanone, and cyclohexanol. The first example of direct formal cross‐coupling of diaryl ether 4‐O‐5 linkage models
Facile preparation of aromatic fluorides by deaminative fluorination of aminoarenes using hydrogen fluoride combined with bases
作者:Norihiko Yoneda、Tsuyoshi Fukuhara
DOI:10.1016/0040-4020(95)00867-8
日期:1996.1
namely, diazotization of aminoarenes followed by in situ fluoro-dediazoniation of the corresponding diazonium ions, was successfully accomplished to produce fluoroarenes in high yields by using hydrogenfluoride combined with base solutions. The diazotization stage has been found to play the most important part in yielding fluoroarenes effectively. It was greatly influenced by the composition of the HF
作者:Xiao Shen、Constanze N. Neumann、Claudia Kleinlein、Nathaniel W. Goldberg、Tobias Ritter
DOI:10.1002/anie.201500902
日期:2015.5.4
An alkylaryletherbondformation reaction between phenols and primary and secondary alcohols with PhenoFluor has been developed. The reaction features a broad substrate scope and tolerates many functional groups, and substrates that are challenging for more conventional etherbond forming processes may be coupled. A preliminary mechanistic study indicates reactivity distinct from conventional ether