Palladium-Catalysed and Phosphine-Promoted Synthesis of Diaryl Ethers through Self-Coupling
作者:Dawei Wang、Zhaojun Xu、Xiaoli Yu、Yongliang Li、Huida Wan
DOI:10.3184/174751916x14768086301069
日期:2016.11
An efficient, palladium acetate-catalysed, tributylphosphine-promoted direct synthesis of symmetrical diarylethers through the self-coupling of aryl fluorides has been developed with K2CO3/ZrO2 as a base. This provides an alternative method to prepare aromatic polymers, important synthetic intermediates and natural products for use in the field of pharmaceuticals and industrial materials.
Transition‐metal‐catalyzedCF activation, in comparison with CHactivation, is more difficult to achieve and therefore less fully understood, mainly because carbon–fluorine bonds are the strongest known single bonds to carbon and have been very difficult to cleave. Transition‐metal complexes are often more effective at cleaving stronger bonds, such as C(sp2)X versus C(sp3)X. Here, the iridium‐catalyzedCF activation
Witt,H. et al., Angewandte Chemie, 1970, vol. 82, p. 79 - 80
作者:Witt,H. et al.
DOI:——
日期:——
Metal- and Phenol-Free Synthesis of Biaryl Ethers: Access to Dibenzobistriazolo-1,4,7-oxadiazonines and Vancomycin-Like Glyco-Macrocycles as Antibacterial Agents
作者:Kartikey Singh、Gaurav Sharma、Manjulika Shukla、Ruchir Kant、Sidharth Chopra、Sanjeev K. Shukla、Rama P. Tripathi
DOI:10.1021/acs.joc.8b01631
日期:2018.12.21
An efficient synthesis of biaryl ethers, from electron-deficient aryl halides using NaH/DMSO under metal- and phenol-free conditions, has been achieved to access dibenzo-bistriazolo-1,4,7-oxadiazonines and vancomycin-like glyco-macrocycles. A 44-membered glyco-macrocycle showed promising activity against vancomycin-resistant Staphylococcus aureus (VRSA).