Mechanistic Studies of the Oxidative Addition of Aryl Halides to Ni(0) Centers Bearing Phosphine Ligands
نویسندگان
چکیده
منابع مشابه
Computed ligand effects on the oxidative addition of phenyl halides to phosphine supported palladium(0) catalysts.
The manifold of reaction pathways for the oxidative addition of phenyl bromide and phenyl chloride substrates to phosphine-modified palladium(0) complexes has been investigated with dispersion-corrected density functional theory (B3LYP-D2) for a range of synthetically relevant ligands, permitting the evaluation of ligand, substrate and method effects on calculated predictions. Bulky and electro...
متن کاملMechanism of the oxidative addition of aryl halides to bis-carbene palladium(0) complexes*
Bis-N-heterocyclic carbenes Pd0 complexes, Pd(NHC)2, are efficient catalysts in Heck reactions performed with aryl bromides or chlorides. The Pd(NHC)2 that are not stable are generated in situ from PdII precursors PdY2(NHC)2 (Y = halides) after a chemical reduction. The latter procedure can be mimicked by an electrochemical reduction. The transient Pd(NHCBn)2 is generated by electrochemical red...
متن کاملPalladium-catalyzed aminations of aryl halides with phosphine-functionalized imidazolium ligands.
A series of 1-(2-diphenylphosphinoferrocenyl)ethyl-3-substituted imidazolium iodides [3-substituent = methyl (1a); isopropyl (1b); tert-butyl (1c); 1-adenosyl (1d); cyclohexyl (1e); 2,6-dimethylphenyl (1f); 2,4,6-trimethylphenyl (1g); 2,6-diisopropylphenyl (1h)] have been prepared and evaluated as ligands in the palladium-catalyzed aminations of aryl halides with various amines. The scope of th...
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چکیده ندارد.
15 صفحه اولCationic ruthenium alkylidene catalysts bearing phosphine ligands
The discovery of highly active catalysts and the success of ionic liquid immobilized systems have accelerated attention to a new class of cationic metathesis catalysts. We herein report the facile syntheses of cationic ruthenium catalysts bearing bulky phosphine ligands. Simple ligand exchange using silver(I) salts of non-coordinating or weakly coordinating anions provided either PPh3 or chelat...
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ژورنال
عنوان ژورنال: CHIMIA International Journal for Chemistry
سال: 2020
ISSN: 0009-4293
DOI: 10.2533/chimia.2020.495