A General and Special Catalyst for Suzuki-Miyaura Coupling Processes
作者:Wenjun Tang、Andrew G. Capacci、Xudong Wei、Wenjie Li、Andre White、Nitinchandra D. Patel、Jolaine Savoie、Joe J. Gao、Sonia Rodriguez、Bo Qu、Nizar Haddad、Bruce Z. Lu、Dhileepkumar Krishnamurthy、Nathan K. Yee、Chris H. Senanayake
DOI:10.1002/anie.201002404
日期:2010.8.9
Biaryl monophosphorus ligands containing a 2,3‐dihydrobenzo[d][1,3]oxaphosphole framework are highly effective for the palladium‐catalyzed Suzuki–Miyaura cross‐coupling reactions of a wide range of substrates. Ligand 1 has demonstrated excellent performance for coupling reactions of extremely hindered arylboronic acids.
含有2,3-二氢苯并[ d ] [1,3]恶唑骨架的联芳基单磷配体对于钯催化的多种底物的Suzuki-Miyaura交叉偶联反应非常有效。配体1已显示出极受阻碍的芳基硼酸偶联反应的优异性能。
A new family of phosphine ligands bearing a bulky carbazolyl scaffold is described. With the combination of ligand 2a and Pd(OAc)2, difficult tri-ortho-substituted biaryl couplings are accomplished smoothly. In particular, the catalyst loading as low as 0.02 mol% of Pd for non-activated 2,6-disubstituted aryl chloride coupling can be achieved.
hindered biaryls efficiently, a series of NHC-Pd(II)-azole complexes bearing sterically hindered ligands were synthesized and characterized. The steric environment effect as well as the electronic effect of the azole ligands has been assessed. All these complexes were applied in the Suzuki−Miyaura cross-coupling reaction of sterically hindered arylchlorides with low catalysts loadings (0.1 mol %) under
Efficient palladium-catalyzed Suzuki–Miyaura coupling of aryl chlorides with arylboronic acids using benzoferrocenyl phosphines as supporting ligands
作者:Muralidhara Thimmaiah、Shiyue Fang
DOI:10.1016/j.tet.2007.04.057
日期:2007.7
palladium-catalyzed Suzuki–Miyauracoupling of aryl chlorides with arylboronicacids. Of these ligands, the more electron-rich and steric demanding benzoferrocenyl dicyclohexyl phosphine was found highly effective for the reaction followed by the benzoferrocenyl diisopropyl phosphine. The corresponding diethyl and diphenyl phosphines are much less active. When the dicyclohexyl phosphine was used, both electron-rich