Palladium-catalyzed Direct C–H Bond Arylation of Simple Arenes with Aryltrimethylsilanes
作者:Kenji Funaki、Hiroshi Kawai、Tetsuo Sato、Shuichi Oi
DOI:10.1246/cl.2011.1050
日期:2011.9.5
Direct C–H bond arylation of arenes with aryltrimethylsilanes catalyzed by PdCl2 in the presence of CuCl2 as an oxidant has been developed. In addition to the role as the oxidant, CuCl2 is found to be necessary for the selective cross-coupling reaction.
Phenanthrene Synthesis by Eosin Y-Catalyzed, Visible Light- Induced [4+2] Benzannulation of Biaryldiazonium Salts with Alkynes
作者:Tiebo Xiao、Xichang Dong、Yanchi Tang、Lei Zhou
DOI:10.1002/adsc.201200569
日期:2012.11.26
A metal-free, visible light-induced [4+2] benzannulation of biaryldiazonium salts with alkynes was developed. With eosin Y as photoredox catalyst, a variety of 9-substituted or 9,10-disubstitutedphenanthrenes were obtained via a cascade radical addition and cyclization sequence.
Gold-catalyzed efficient tandem assembly of terminal alkynes and arynes: synthesis of alkynylated biphenyl derivatives
作者:Chunsong Xie、Yuhong Zhang、Yuzhu Yang
DOI:10.1039/b806821f
日期:——
Gold catalysts have been found to catalyze the tandem assembly of arynes and terminal alkynes efficiently in the presence of CuI under mild reaction conditions to provide useful alkynylated biphenyl derivatives.
Direct CâH bond arylation of simple arenes with aryltin reagents has been successfully catalysed by PdCl2 in the presence of CuCl2. CuCl2 proved to be an activator for a palladium intermediate as well as an oxidant.
Sequential Cross‐Coupling/Annulation of
<i>ortho</i>
‐Vinyl Bromobenzenes with Aromatic Bromides for the Synthesis of Polycyclic Aromatic Compounds
作者:Dong Wei、Meng‐Yao Li、Bin‐Bin Zhu、Xiao‐Di Yang、Fang Zhang、Chen‐Guo Feng、Guo‐Qiang Lin
DOI:10.1002/anie.201910792
日期:2019.11.11
A sequential cross-coupling/annulation of ortho-vinyl bromobenzenes with aromatic bromides was realized, providing a direct and modular approach to access polycyclicaromaticcompounds. A vinyl-coordinated palladacycle was proposed as the key intermediate for this sequential process. Excellent chemoselectivity and regioselectivity were observed in this transformation. The practicability of this method