Highly Efficient Suzuki-Miyaura Coupling of Aryl Tosylates and Mesylates Catalyzed by Stable, Cost-Effective [1,3-Bis(diphenylphosphino)propane]nickel(II) Chloride [Ni(dppp)Cl2] with only 1 mol% Loading
作者:Han Gao、You Li、Yi-Guo Zhou、Fu-She Han、Ying-Jie Lin
DOI:10.1002/adsc.201000710
日期:2011.2.11
We present a highly active, inexpensive, universally applicable, and markedly stable [1,3-bis(diphenylphosphino)propane]nickel(II) chloride [Ni(dppp)Cl2] catalyst that is capable of effecting the Suzuki–Miyaura cross-coupling of the inherently less reactive but readily available aryl tosylates and mesylates with only 1 mol% loading and in the absence of extra supporting ligand. Under the optimized
New cyclopalladated benzothiophenes: a catalyst precursor for the Suzuki coupling of deactivated aryl chlorides
作者:Madavu Salian Subhas、Shailesh S. Racharlawar、B. Sridhar、P. Kavin Kennady、Pravin R. Likhar、Mannepalli Lakshmi Kantam、Suresh K. Bhargava
DOI:10.1039/b927367k
日期:——
with an excess of phosphine ligands in benzene at roomtemperature selectively afforded trans-bis(phosphine) palladium complexes in good yields. The trans-bis(tricyclohexylphosphine) palladium complex was found to be an active catalyst in the Suzuki coupling of electron rich arylchlorides. The complex was also employed in the catalytic synthesis of stericallyhindered biaryls. The anticancer activity
The palladium-catalyzedarylation of alpha,alpha-disubstituted arylmethanols with aryl halides proceeds not only via C-H bondcleavage at the ortho-position, but also via cleavage of the sp(2)-sp(3) C-C bond with the liberation of ketones (beta-carbon elimination) to give the corresponding biaryls. Both reactions appear to occur through common arylpalladium(II) alcoholate intermediates. The results
Palladium catalyzed Suzuki–Miyaura coupling with aryl chlorides using a bulky phenanthryl N-heterocyclic carbene ligand
作者:Chun Song、Yudao Ma、Qiang Chai、Chanqin Ma、Wei Jiang、Merritt B. Andrus
DOI:10.1016/j.tet.2005.05.071
日期:2005.8
carbene (NHC) based palladium acetate catalyst was effective for the coupling of various aryl and vinyl chlorides with organoboron compounds. N,N-Bis-(2,9-dicyclohexyl-10-phenanthryl)-4,5-dihydroimidazolium chloride 8 (H2ICP·HCl) with Pd(OAc)2 and KF·18-c-6 in THF at room temperature gave Suzuki–Miyaura coupling of aryl and vinyl chorides, including unactivated and di-ortho substituted substrates in high
An air-stable aryl substituted indenyl phosphine used in combination with Pd(OAc)2 provides a highly efficient catalyst for the Suzuki–Miyaura cross-coupling reaction of sterically hindered aryl halides with aryl boronic acids.