Synthesis of Biaryl Derivatives by Using Ruthenium-Mediated [2+2+2] Cyclotrimerization and Suzuki-Miyaura Cross-Coupling as Key Steps
作者:Sambasivarao Kotha、Vittal Seema、Shaikh Mobin
DOI:10.1055/s-0030-1260009
日期:2011.5
Functionalized biaryl derivatives have been prepared by applying [2+2+2] cyclotrimerization with the aid of Grubbs’ first-generation catalyst (G-I). The trimerized products were subjected to the Suzuki-Miyaura cross-coupling reaction sequence to generate highly functionalized biaryl derivatives.
Gold(I)-Catalyzed Diazo Coupling: Strategy towards Alkene Formation and Tandem Benzannulation
作者:Daming Zhang、Guangyang Xu、Dong Ding、Chenghao Zhu、Jian Li、Jiangtao Sun
DOI:10.1002/anie.201406712
日期:2014.10.6
A gold(I)‐catalyzed cross‐coupling of diazo compounds to afford tetrasubstituted alkenes has been developed by taking advantage of a trivial electronic difference between two diazo substrates. A N‐heterocyclic‐carbene‐derived gold complex is the most effective catalyst for this transformation. Based on this new strategy, a gold(I)‐initiated benzannulation has been achieved through a tandem reaction