Heteroleptic (N-heterocyclic carbene)-Pd-pyrazole (indazole) complexes: Synthesis, characterization and catalytic activities towards C-C and C-N cross-coupling reactions

2017 ◽  
Vol 31 (10) ◽  
pp. e3734 ◽  
Author(s):  
Jin Yang
Keyword(s):  
Cross Coupling ◽  
Coupling Reactions ◽  
Catalytic Activities ◽  
Cross Coupling Reactions

Agglomeration of Pd0 nanoparticles causing different catalytic activities of Suzuki carbonylative cross-coupling reactions catalyzed by PdII and Pd0 immobilized on dopamine-functionalized magnetite nanoparticles

2015 ◽  
Vol 39 (4) ◽  
pp. 2988-2996 ◽  
Author(s):  
Yu Long ◽  
Kun Liang ◽  
Jianrui Niu ◽  
Xin Tong ◽  
Bing Yuan ◽  
...  
Keyword(s):  
Magnetite Nanoparticles ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Catalytic Activities ◽  
Cross Coupling Reactions

Agglomeration of Pd0 nanoparticles caused different catalytic activities of Suzuki carbonylative cross-coupling reactions catalyzed by Fe3O4/DA–PdII and Fe3O4/DA–Pd0 catalysts.

scholarly journals POxAP Precatalysts and the Negishi Cross-Coupling Reaction

Synthesis ◽  
2019 ◽  
Vol 52 (01) ◽  
pp. 51-59
Author(s):  
Shuang-Qi Tang ◽  
Martine Schmitt ◽  
Frédéric Bihel
Keyword(s):  
Functional Groups ◽  
Oxidative Addition ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Catalytic Activities ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Wide Range ◽  
Organozinc Reagents

Recently developed for the Fukuyama reaction, post-oxidative addition precatalysts (POxAPs) are also very efficient in catalyzing Negishi cross-coupling reactions between organohalides and organozinc reagents. Using very low catalyst loadings, POxAPs show similar catalytic activities to those of classical precatalysts such as XPhos Pd G4 or PEPPSI-IPr, with turnover numbers of up to 93,000. POxAPs are easily prepared, are stable to air and moisture, tolerate a wide range of functional groups in the Negishi cross-coupling reaction and contribute advantageously to the arsenal of organic chemists in terms of Pd precatalysts.

Dual Nickel/Palladium-Catalyzed Reductive Cross-Coupling Reactions Between Two Phenol Derivatives

2020 ◽  
Author(s):  
Baojian Xiong ◽  
Yue Li ◽  
Yin Wei ◽  
Søren Kramer ◽  
Zhong Lian
Keyword(s):  
Functional Group ◽  
Low Cost ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Phenol Derivatives ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed ◽  
One Step ◽  
Aryl Tosylates ◽  
Low Sensitivity

Cross-coupling between substrates that can be easily derived from phenols is highly attractive due to the abundance and low cost of phenols. Here, we report a dual nickel/palladium-catalyzed reductive cross-coupling between aryl tosylates and aryl triflates; both substrates can be accessed in just one step from readily available phenols. The reaction has a broad functional group tolerance and substrate scope (>60 examples). Furthermore, it displays low sensitivity to steric effects demonstrated by the synthesis of a 2,2’disubstituted biaryl and a fully substituted aryl product. The widespread presence of phenols in natural products and pharmaceuticals allow for straightforward late-stage functionalization, illustrated with examples such as Ezetimibe and tyrosine. NMR spectroscopy and DFT calculations indicate that the nickel catalyst is responsible for activating the aryl triflate, while the palladium catalyst preferentially reacts with the aryl tosylate.

An Iron-Based Catalyst Enables The Enantioconvergent Synthesis of Chiral 1,1-Diarylalkanes Through a Suzuki-Miyaura Cross-Coupling Reaction

2020 ◽  
Author(s):  
Chet Tyrol ◽  
Nang Yone ◽  
Connor Gallin ◽  
Jeffery Byers
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Radical Intermediates ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Boronic Esters ◽  
Carbon Centered Radical ◽  
Iron Based ◽  
High Yields

By using an iron-based catalyst, access to enantioenriched 1,1-diarylakanes was enabled through an enantioselective Suzuki-Miyaura crosscoupling reaction. The combination of a chiral cyanobis(oxazoline) ligand framework and 1,3,5-trimethoxybenzene additive were essential to afford high yields and enantioselectivities in cross-coupling reactions between unactivated aryl boronic esters and a variety of benzylic chlorides, including challenging ortho-substituted benzylic chloride substrates. Mechanistic investigations implicate a stereoconvergent pathway involving carbon-centered radical intermediates.

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