Palladium Complexes with Pyrimidine-Functionalized N-Heterocyclic Carbene Ligands: Synthesis, Structure and Catalytic Activity

2009 ◽  
Vol 28 (7) ◽  
pp. 2142-2149 ◽  
Author(s):  
Dirk Meyer ◽  
Maria A. Taige ◽  
Alexander Zeller ◽  
Konrad Hohlfeld ◽  
Sebastian Ahrens ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes ◽  
Carbene Ligands

Isomeric Palladium Complexes Bearing Imidazopyridine-Based Abnormal Carbene Ligands: Synthesis, Characterization, and Catalytic Activity in Direct C–H Arylation Reaction

2019 ◽  
Vol 38 (4) ◽  
pp. 805-815 ◽  
Author(s):  
Yan-Yi Lee ◽  
Han-Wei Zseng ◽  
Zong-Han Tsai ◽  
Yong-Siang Su ◽  
Ching-Han Hu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes ◽  
Carbene Ligands

scholarly journals Synthesis and Catalytic Activity of Chiral Linker-Bridged Bis-N-Heterocyclic Carbene Dipalladium Complexes

2018 ◽  
Vol 42 (6) ◽  
pp. 320-325
Author(s):  
Xu Li ◽  
Guowen Zhang ◽  
Man Chao ◽  
Changsheng Cao ◽  
Guangsheng Pang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Phenylboronic Acid ◽  
Suzuki Reaction ◽  
Enantiomeric Excess ◽  
Phenyl Group ◽  
Palladium Complexes ◽  
Carbene Ligands ◽  
Efficient Catalyst ◽  
Pd Complexes ◽  
Better Than

A series of new chiral-bridged N-heterocyclic carbene ligands with different substituents and their corresponding palladium complexes have been synthesised. The effect of the substituents on the catalytic activity of these Pd complexes was investigated in the Suzuki reaction of p-bromotoluene with phenylboronic acid, and the results showed that the complexes with aryl substituents performed better than those with alkyl substituents. The complex with the most sterically hindered substituent (diisopropyl on a phenyl group) performed best, and it was also an efficient catalyst for the reaction of various arylboronic acids with aryl halides having different electronic and steric properties. In addition, it was employed as a catalyst in the asymmetric Suzuki reaction, but only moderate yields of 1,1-binaphthalenes with less than 20% enantiomeric excess were obtained.

Complexes LNi(Cp)X with alkylamino-substituted N-heterocyclic carbene ligands (L) and their catalytic activity in the Suzuki—Miyaura reaction

2021 ◽  
Vol 70 (7) ◽  
pp. 1281-1289
Author(s):  
V. V. Chesnokov ◽  
M. A. Shevchenko ◽  
S. B. Soliev ◽  
V. A. Tafeenko ◽  
V. M. Chernyshev
Keyword(s):  
Catalytic Activity ◽  
Carbene Ligands

Catalytic activity of chelating N-heterocyclic carbene palladium complexes towards selective phosphorylation of coumarins

2016 ◽  
Vol 818 ◽  
pp. 179-184 ◽  
Author(s):  
Liangru Yang ◽  
Xinchi Zhang ◽  
Jinwei Yuan ◽  
Yongmei Xiao ◽  
Pu Mao
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes

Homogeneous versus Supported ONN Pincer-Type Gold and Palladium Complexes: Catalytic Activity

ChemSusChem ◽  
2009 ◽  
Vol 2 (7) ◽  
pp. 650-657 ◽  
Author(s):  
Carolina del Pozo ◽  
Nathalie Debono ◽  
Avelino Corma ◽  
Marta Iglesias ◽  
Félix Sánchez
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes

Synthesis of sterically hindered N -benzyladamantyl substituted benzimidazol-2-ylidene palladium complexes and investigation of their catalytic activity in aqueous medium

Tetrahedron ◽  
2017 ◽  
Vol 73 (40) ◽  
pp. 5940-5945 ◽  
Author(s):  
Zineb Imene Dehimat ◽  
Aziz Paşahan ◽  
Dahmane Tebbani ◽  
Sedat Yaşar ◽  
İsmail Özdemir
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Palladium Complexes ◽  
Sterically Hindered

scholarly journals Amine-Catalysed Suzuki–Miyaura-Type Coupling? the Identification and Isolation of the Palladium Culprits.

2021 ◽  
Author(s):  
Mickaël Avanthay ◽  
Robin Bedford ◽  
Callum Begg ◽  
Dietrich Böse ◽  
Jonathan Clayden ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cross Coupling ◽  
Boronic Acids ◽  
Palladium Complexes ◽  
Aryl Halides ◽  
Type Coupling ◽  
Paradigm Shifting

A recent report in Nature Catalysis detailed the potentially paradigm-shifting organocatalysis of Suzuki cross-coupling of aryl halides with aryl boronic acids, catalysed by simple amine species. We have conducted a reinvestigation of key claims in this paper across multiple academic and industrial laboratories that shows that the observed catalytic activity cannot be due to the amine, but rather is due to tricyclohexylphosphine palladium complexes that are readily entrained during the purification of the amine<b>.</b>

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