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
cyclopentane/[PdCl(C3H5)]2 system catalyses efficiently the cross-coupling of aryl bromides with functionalised arylboronicacids. The electronic properties of the arylboronicacids seem to have a minor influence on the reaction rate. Better results were generally obtained for the reaction of electron poor aryl bromides associated with electron rich arylboronicacids rather than the contrary.
Zwitterionic Palladium Complexes: Room-Temperature Suzuki–Miyaura Cross-Coupling of Sterically Hindered Substrates in an Aqueous Medium
作者:Jhen-Yi Lee、Dabalina Ghosh、Jing-Yi Lee、Shih-Sheng Wu、Ching-Han Hu、Shuang-De Liu、Hon Man Lee
DOI:10.1021/om500834y
日期:2014.11.24
charge on the ligand ancillary. The pyridine ligand in the zwitterionic complexes can be facilely replaced by phosphine ligands. Seven of these newcomplexes were successfully characterized by X-ray crystallography. The zwitterionic phosphine complexes were highly efficient in catalyzing room-temperature Suzuki–Miyaura reactions between sterically hindered aryl chlorides and arylboronic acids in an aqueous
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
Suzuki-Miyaura Cross-Coupling Reaction Catalyzed by PEPPSI-Type 1,4-Di(2,6-diisopropylphenyl)-1,2,3-triazol-5-ylidene (<i>tz</i>IPr) Palladium Complex
作者:Jie Huang、Jong-Tai Hong、Soon Hyeok Hong
DOI:10.1002/ejoc.201201075
日期:2012.10.11
A 1,4-di(2,6-diisopropylphenyl)-1,2,3-triazol-5-ylidene (tzIPr)-based PEPPSI-typepalladiumcomplex was developed as an excellent precatalyst for the Suzuki–Miyauracross-couplingreaction. The complex showed high activity under mild conditions for the cross-couplingreactions between various types of aryl chlorides and aryl boronic acids regardless of the steric and electronic nature of the substrates