ChemInform Abstract: Application of Suzuki Cross-Coupling Reaction Catalyzed by Ligandless Palladium Chloride in the Synthesis of Liquid Crystals (III).

ChemInform ◽  
2008 ◽  
Vol 39 (1) ◽  
Author(s):  
Mei Huang ◽  
Jianhua Cheng ◽  
Xiaochun Tao ◽  
Mingwang Wei ◽  
Dong Shen
Keyword(s):  
Liquid Crystals ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Palladium Chloride ◽  
Cross Coupling Reaction

Application of Suzuki Cross‐Coupling Reaction Catalyzed by Ligandless Palladium Chloride in the Synthesis of Liquid Crystals

2007 ◽  
Vol 37 (13) ◽  
pp. 2203-2208 ◽  
Author(s):  
Mei Huang ◽  
Jianhua Cheng ◽  
Xiaochun Tao ◽  
Mingwang Wei ◽  
Dong Shen
Keyword(s):  
Liquid Crystals ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Palladium Chloride ◽  
Cross Coupling Reaction

Palladium chloride catalyzed Hiyama cross-coupling reaction using phenyltrimethoxysilane

2008 ◽  
Vol 9 (8) ◽  
pp. 1685-1687 ◽  
Author(s):  
Changduo Pan ◽  
Miaochang Liu ◽  
Li Zhao ◽  
Huayue Wu ◽  
Jinchang Ding ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Palladium Chloride ◽  
Cross Coupling Reaction

Novel 2-phenyl-6-phenylethynyl-4-(trifluoromethyl)quinolines: Synthesis by Sonogashira cross-coupling reaction and their evaluation as liquid crystals

2019 ◽  
Vol 287 ◽  
pp. 110896 ◽  
Author(s):  
Melissa B. Rodrigues ◽  
Renato A.P. Halfen ◽  
Sarah C. Feitosa ◽  
Clarissa P. Frizzo ◽  
Marcos A.P. Martins ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction

scholarly journals Palladium Nanoparticles Immobilized on Poly(vinyl chloride)-Supported Pyridinium as an Efficient and Recyclable Catalyst for Suzuki-Miyaura Cross-Coupling Reaction

2011 ◽  
Vol 8 (4) ◽  
pp. 1490-1497
Author(s):  
Bo Zhou ◽  
Yi-Qun Li
Keyword(s):  
Vinyl Chloride ◽  
Palladium Nanoparticles ◽  
Simple Procedure ◽  
Phenylboronic Acid ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Operating Conditions ◽  
Palladium Chloride ◽  
Poly Vinyl Chloride ◽  
Cross Coupling Reaction

The palladium nanoparticles immobilized on the polymeric surface of poly(vinyl chloride)-supported pyridinium (PVC-Py-Pd0) were achieved by a simple procedure by applying the corresponding functionalized polymer and palladium chloride in ethanol solution. The as-prepared catalyst (PVC-Py-Pd0) was found to be air and moisture stable and exhibits significant catalytic activity for Suzuki-Miyaura cross-coupling reaction of various aryl halides and phenylboronic acid under milder operating conditions. The procedure presented here showed several merits such as short reaction time, simple experimental and isolated procedure and excellent yields of products. Furthermore, the catalyst can be easily recovered and reused for at least six times with consistent activities.

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.

Ni(0)-Catalyzed α-Allylic Alkylation of Regular Ketones with 1,3-Dienes under pH and Redox-neutral Conditions

2019 ◽  
Author(s):  
Tiantian Chen ◽  
Yang Yang ◽  
Liyu Xie ◽  
Haijian Yang ◽  
Guangbin Dong ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Dual Role ◽  
Allylic Alkylation ◽  
Cross Coupling Reaction ◽  
Neutral Conditions

<p>We report a Ni(0)-catalyzed cross coupling reaction between simple ketones and 1,3-dienes. A variety of a-allylic alkylation products were formed in an 1,2-addition manner with excellent regioselectivity. Water was found to significantly accelerate this transformation. A HO-Ni-H species generated from oxidative addition of Ni(0) to H<sub>2</sub>O is proposed to play a “dual role” in activating both the ketone and the diene substrate.</p>

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