Remarkably Effective Phosphanes Simply with a PPh<sub>2</sub>Moiety: Application to Pd-Catalysed Cross-Coupling Reactions for Tetra-<i>ortho</i>-substituted Biaryl Syntheses
作者:Chau Ming So、Wing Kin Chow、Pui Ying Choy、Chak Po Lau、Fuk Yee Kwong
DOI:10.1002/chem.201000723
日期:2010.7.19
Expanding the horizons of ArPPh2: New applications of triarylphosphane ligands are presented. The Pd–L1 and Pd–L2 complexes offer exceptionally high activity in Suzuki–Miyaura cross‐couplings of aryl chlorides. The extremely congested synthesis of tetra‐ortho‐substituted biaryl compounds is achieved for the first time by simply using triarylphosphane ligands.
Tetra-<i>ortho</i>-Substituted Biaryls through Palladium-Catalyzed Suzuki−Miyaura Couplings with a Diaminochlorophosphine Ligand
作者:Lutz Ackermann、Harish K. Potukuchi、Andreas Althammer、Robert Born、Peter Mayer
DOI:10.1021/ol1000186
日期:2010.3.5
A palladium complex derived from a sterically hindered diaminochlorophosphine allowed for Suzuki−Miyaura cross-couplings of chloroarenes with ample scope and provided access to tetra-ortho-substituted bi(hetero)aryls.
Sterically Demanding, Bioxazoline-Derived N-Heterocyclic Carbene Ligands with Restricted Flexibility for Catalysis
作者:Gereon Altenhoff、Richard Goddard、Christian W. Lehmann、Frank Glorius
DOI:10.1021/ja045349r
日期:2004.11.1
A unique family of N-heterocycliccarbenes derived from bioxazolines (IBiox) suitable for application in transition-metal catalysis is described. The ligands are electron rich, sterically demanding, and have restricted flexibility. Their usefulness has been demonstrated in the Suzuki-Miyaura cross-coupling of stericallyhinderedarylchlorides and boronic acids. For the first time, tetraortho-substituted