C S cross-coupling catalyzed by a series of easily accessible, well defined Ni(II) complexes of the type [(NHC)Ni(Cp)(Br)]
作者:Mario A. Rodríguez-Cruz、Simón Hernández-Ortega、Hugo Valdés、Ernesto Rufino-Felipe、David Morales-Morales
DOI:10.1016/j.jcat.2020.01.016
日期:2020.3
The synthesis, characterization and catalytic evaluation of a series of NHC-Ni(II) complexes 1-Ni (-Me), 2-Ni (-nBu) and 3-Ni (-Bn) bearing a phthalimide fragment and a cyclopentadienyl (Cp) ligand is reported. The complexes were evaluated in CS couplings of iodobenzene and a range of thiols. The reactions were carried out using a catalyst loading of 5 mol % in DMF during 0.5–19 h. Being complex 2-Ni
New arylselanylpyrazole-copper catalysts: Highly efficient catalytic system for C Se and C S coupling reactions
作者:Felipe Lange Coelho、Lucielle Codeim Dresch、Rafael Stieler、Leandra Franciscato Campo、Paulo Henrique Schneider
DOI:10.1016/j.catcom.2018.12.009
日期:2019.3
CSe and CS couplingreactions. The performance of these complexes for CSe reactions was investigated in chalcogenoacetylene synthesis. The reactions were carried out under mild and aerobic conditions and afforded selanylalkynes bearing a variety of electron-withdrawing and electron-donating groups. The performance of these catalysts for CS coupling was investigated through the reaction of aryl halides
Highly regioselective synthesis of aryl chalcogenides through C–H functionalization of arenes
作者:Jun-Hao Cheng、Chih-Lun Yi、Tsung-Jui Liu、Chin-Fa Lee
DOI:10.1039/c2cc33950a
日期:——
We report here the regioselective synthesis of aryl chalcogenides through the iridium-catalyzed meta CâH borylation followed by copper-catalyzed CâS coupling reaction with chalcogenide sources in one pot, giving the 3,5-disubstituted aryl chalcogenides with high regioselectivity and good yields.
been studied from aryl bromide and phenol/aryl disulfide/diselenide substrates. A series of unsymmetrical diaryl chalcogenides were accessedfrom aryl bromide and diaryl dichalcogenide precursors by using 2.5 equiv of potassium tert-butoxide in DMSO at 80 °C. Unsymmetrical diaryl ethers were also obtained by using phenol precursors at 40–45 °C. Aryl bromides with methyl, trifluoromethyl, methoxy and
Facile Preparation of Aryl Sulfides Using Palladium Catalysis under Mild Conditions
作者:Tatsuo Okauchi、Kouji Kuramoto、Mitsuru Kitamura
DOI:10.1055/s-0030-1259012
日期:2010.12
A convenient method for C-S cross-coupling of aryl bromides with various thiols has been developed that involves the use of a 1,1'-bis(diphenylphosphino)ferrocene (DPPF)-ligated palladium complex with N,N-diisopropylethylamine (DIPEA) as the base. This coupling is tolerant of a wide range of functional groups, including hydroxy, amino, cyano, nitro, formyl, and carboxyl groups.