An aerobic ligandless palladium acetate catalysed Suzuki–Miyaura cross-coupling reaction in an aqueous solvent

2008 ◽  
Vol 2008 (9) ◽  
pp. 525-527 ◽  
Author(s):  
Chen Li ◽  
Xiao-Qiang Li ◽  
Chi Zhang
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Palladium Acetate ◽  
Cross Coupling Reaction ◽  
Aqueous Solvent

An N-heterocyclic carbene-functionalised covalent organic framework with atomically dispersed palladium for coupling reactions under mild conditions

2019 ◽  
Vol 21 (19) ◽  
pp. 5267-5273 ◽  
Author(s):  
Junjuan Yang ◽  
Yuanyuan Wu ◽  
Xiaowei Wu ◽  
Wenjing Liu ◽  
Yaofang Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Pure Ethanol ◽  
Covalent Organic Framework ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Aqueous Solvent ◽  
Organic Framework

We report a heterogeneous catalyst based on N-heterocyclic carbene-functionalized covalent organic framework, which shows high activity in the C–C cross coupling reaction at room temperature in pure/ethanol aqueous solvent even with multiple reuse.

scholarly journals Hollow-Shell-Structured Mesoporous Silica-Supported Palladium Catalyst for an Efficient Suzuki-Miyaura Cross-Coupling Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 582
Author(s):  
Abdulelah Taher Ali Mohammed ◽  
Lijian Wang ◽  
Ronghua Jin ◽  
Guohua Liu ◽  
Chunxia Tan
Keyword(s):  
Chemical Engineering ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cost Effective ◽  
Active Species ◽  
Palladium Acetate ◽  
Hollow Shell ◽  
Electron Microscopies ◽  
Cross Coupling Reaction ◽  
The Cost

The construction of a high stability heterogeneous catalyst for privileged common catalysis is a benefit in regard to reuse and separation. Herein, a palladium diphenylphosphine-based hollow-shell-structured mesoporous catalyst (HS@PdPPh2@MSN) was prepared by immobilizing bis((diphenylphosphino)ethyltriethoxysilane)palladium acetate onto the inner wall of a mesoporous organicsilicane hollow shell, whose surface was protected by a –Si(Me)3 group. Electron microscopies confirmed its hollow-shell-structure, and structural analyses and characterizations revealed its well-defined single-site active species within the silicate network. As presented in this study, the newly constructed HS@PdPPh2@MSN enabled an efficient Suzuki-Miyaura cross-coupling reaction for varieties of substrates with up to 95% yield in mild conditions. Meanwhile, it could be reused at least five times with good activity, indicating its excellent stability and recyclability. Furthermore, the cost-effective and easily synthesized HS@PdPPh2@MSN made it a good candidate for employment in fine chemical engineering.

Ferromagnetic Chain Based on Verdazyl-Nitroxide Diradical

2020 ◽  
Author(s):  
Evgeny Tretyakov ◽  
Svetlana Zhivetyeva ◽  
Pavel Petunin ◽  
Dmitry Gorbunov ◽  
Nina Gritsan ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Ferromagnetic Coupling ◽  
Nitronyl Nitroxide ◽  
Triplet Ground State ◽  
One Dimensional ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed ◽  
Ferromagnetic Chain ◽  
High Yields

<p>Verdazyl-nitroxide diradicals were synthesized using the palladium-catalyzed cross-coupling reaction of the corresponding iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields (up to 82%). The synthesized diradicals were found to be highly thermally stable and have a singlet (D<i>E</i><sub>ST</sub> » -64 cm<sup>–1</sup>) or triplet ground state (D<i>E</i><sub>ST</sub> ³ 25 and 100 cm<sup>–1</sup>), depending on which canonical hydrocarbon diradical type they belong to. Upon crystallization, triplet diradicals form unique one-dimensional (1D) spin <i>S</i> = 1 chains of organic diradicals with intrachain ferromagnetic coupling of <i>J</i>′/<i>k</i><sub>B</sub> from 3 to 6 K.</p>

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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