Synthesis and Catalytic Activity of Chiral Linker-Bridged Bis-N-Heterocyclic Carbene Dipalladium Complexes
作者:Xu Li、Guowen Zhang、Man Chao、Changsheng Cao、Guangsheng Pang、Yanhui Shi
DOI:10.3184/174751918x15293145282582
日期:2018.6
substituents and their corresponding palladium complexes have been synthesised. The effect of the substituents on the catalytic activity of these Pd complexes was investigated in the Suzuki reaction of p-bromotoluene with phenylboronic acid, and the results showed that the complexes with aryl substituents performed better than those with alkyl substituents. The complex with the most sterically hindered substituent
Proton-Catalyzed, Silane-Fueled Friedel-Crafts Coupling of Fluoroarenes
作者:Oliver Allemann、Simon Duttwyler、Paola Romanato、Kim K. Baldridge、Jay S. Siegel
DOI:10.1126/science.1202432
日期:2011.4.29
carbon-carbon bonds. The venerable Friedel-Crafts reaction appends alkyl or acylgroups to aromatic rings through alkyl or acyl cation equivalents typically generated by Lewis acids. We show that phenyl cation equivalents, generated from otherwise unreactive aryl fluorides, allow extension of the Friedel-Crafts reaction to intramolecular aryl couplings. The enabling feature of this reaction is the exchange
Naphthalene derivative and liquid crystal composition comprising the same
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0952135B1
公开(公告)日:2005-01-05
US2023/329101
申请人:——
公开号:——
公开(公告)日:——
Intramolecular Aryl–Aryl Coupling of Fluoroarenes through Al<sub>2</sub>O<sub>3</sub>-Mediated HF Elimination
作者:K.Yu. Amsharov、P. Merz
DOI:10.1021/jo300783y
日期:2012.6.15
A strategy for effective intramolecular aryl-aryl coupling of fluoroarenes through Al2O3-mediated HF elimination is reported. It is demonstrated that the C-F bond, which is widely believed to be the most passive functionality in organic chemistry, can be reconsidered as a useful functional group allowing very effective C-C bond formation. The solid-state strategy presented in this study opens the possibility for facile syntheses of insoluble extended polycyclic aromatic hydrocarbons.