scholarly journals Mechanically triggered reversible stepwise tricolor switching and thermochromism of anthracene-o-carborane dyad

2018 ◽  
Vol 9 (23) ◽  
pp. 5270-5277 ◽  
Author(s):  
Xueyan Wu ◽  
Jixi Guo ◽  
Yali Cao ◽  
Jianzhang Zhao ◽  
Wei Jia ◽  
...  
Keyword(s):  
Organic Molecule ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Cross Coupling Reaction

A novel single organic molecule–carborane conjugate, CAN, was synthesized in a high yield via a modified nickel-catalyzed cross-coupling reaction incorporating an anthracene unit and an o-carborane moiety.

scholarly journals Cross-Coupling Reaction of Allylic Ethers with Aryl Grignard Reagents Catalyzed by a Nickel Pincer Complex

Molecules ◽  
2019 ◽  
Vol 24 (12) ◽  
pp. 2296 ◽  
Author(s):  
Toru Hashimoto ◽  
Kei Funatsu ◽  
Atsufumi Ohtani ◽  
Erika Asano ◽  
Yoshitaka Yamaguchi
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Grignard Reagents ◽  
High Yield ◽  
Pincer Complex ◽  
Cross Coupling Reaction ◽  
Allylic Aryl Ethers ◽  
Aryl Ethers ◽  
Type Nickel ◽  
Allylic Ethers

A cross-coupling reaction of allylic aryl ethers with arylmagnesium reagents was investigated using β-aminoketonato- and β-diketiminato-based pincer-type nickel(II) complexes as catalysts. An β-aminoketonato nickel(II) complex bearing a diphenylphosphino group as a third donor effectively catalyzed the reaction to afford the target cross-coupled products, allylbenzene derivatives, in high yield. The regioselective reaction of a variety of substituted cinnamyl ethers proceeded to give the corresponding linear products. In contrast, α- and γ-alkyl substituted allylic ethers afforded a mixture of the linear and branched products. These results indicated that the coupling reaction proceeded via a π-allyl nickel intermediate.

scholarly journals Synthesis of C4-alkynylisoxazoles via a Pd-catalyzed Sonogashira cross-coupling reaction

RSC Advances ◽  
2019 ◽  
Vol 9 (16) ◽  
pp. 8894-8904 ◽  
Author(s):  
Wen Yang ◽  
Yongqi Yao ◽  
Xin Yang ◽  
Yingying Deng ◽  
Qifu Lin ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Terminal Alkynes ◽  
Cross Coupling Reaction

A Pd-catalyzed Sonogashira cross-coupling reaction for the synthesis of C4-alkynylisoxazoles from 3,5-disubsitituted-4-iodoisoxazoles and terminal alkynes was described, which could afford the corresponding products with high yield (up to 98%).

scholarly journals A convenient route to symmetrically and unsymmetrically substituted 3,5-diaryl-2,4,6-trimethylpyridines via Suzuki–Miyaura cross-coupling reaction

2016 ◽  
Vol 12 ◽  
pp. 835-845 ◽  
Author(s):  
Dariusz Błachut ◽  
Joanna Szawkało ◽  
Zbigniew Czarnocki
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Reaction Conditions ◽  
Arylboronic Acids ◽  
Cross Coupling Reaction ◽  
Convenient Route

A series of differently substituted 3,5-diaryl-2,4,6-trimethylpyridines were prepared and characterized using the Suzuki–Miyaura coupling reaction with accordingly selected bromo-derivatives and arylboronic acids. The reaction conditions were carefully optimized allowing high yield of isolated products and also the construction of unsymmetrically substituted diarylpyridines, difficult to access by other methods.

A facile synthesis of a solvent-dispersible magnetically recoverable Pd0 catalyst for the C–C coupling reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56028-56034 ◽  
Author(s):  
Li Wu ◽  
Bin Yuan ◽  
Mengmeng Liu ◽  
Hongfei Huo ◽  
Yu Long ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Heck Coupling ◽  
Facile Synthesis ◽  
Efficient Catalyst ◽  
Cross Coupling Reaction

A Pd0/Fe3O4-DA/DMG catalyst exhibited excellent catalytic activity toward the Suzuki, Heck and Kumada cross coupling reaction with a high yield. It is an especially efficient catalyst for Suzuki and Heck coupling in water.

C–P bond construction catalyzed by NiII immobilized on aminated Fe3O4@TiO2 yolk–shell NPs functionalized by (3-glycidyloxypropyl)trimethoxysilane (Fe3O4@TiO2 YS-GLYMO-UNNiII) in green media

2019 ◽  
Vol 43 (14) ◽  
pp. 5341-5356 ◽  
Author(s):  
Maryam Sadat Ghasemzadeh ◽  
Batool Akhlaghinia
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Nanostructured Catalyst ◽  
Cross Coupling Reaction ◽  
Novel Method

An efficient, versatile and novel method for the C–P cross-coupling reaction with a high yield of products using Fe3O4@TiO2YS-GLYMO-UNNiII as a magnetic nanostructured catalyst in the presence of WERSA was reported.

Stereoselective Synthesis of (Z)-2-Bromo-2-CF3-Vinyl Phenyl Sulfide and its Sonogashira Cross-Coupling Reaction

Synlett ◽  
2019 ◽  
Vol 30 (07) ◽  
pp. 837-840 ◽  
Author(s):  
Yui Fukuda ◽  
Takumi Kikumura ◽  
Saki Sakoda ◽  
Genki Ikeda ◽  
Yuki Nakamura ◽  
...  
Keyword(s):  
Stereoselective Synthesis ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Yield ◽  
Phenyl Sulfide ◽  
Cross Coupling Reaction ◽  
Wide Range ◽  
Terminal Acetylenes ◽  
Synthetic Application ◽  
Coupling Partner

A practical synthesis of (Z)-2-bromo-2-CF3-vinyl phenyl sulfide from 2-CF3-vinyl phenyl sulfide was achieved using bromine (Br2) in the presence of LiBr and LiOAc in AcOH in one flask. This method affords a stereodefined product in high yield under mild conditions. The synthetic application of the product was briefly examined, providing a wide range of Sonogashira cross-coupling products using terminal acetylenes as a coupling partner.

scholarly journals Synthesis and characterization of the cyanobenzene-ethylenedithio-TTF donor

2015 ◽  
Vol 11 ◽  
pp. 951-956 ◽  
Author(s):  
Sandrina Oliveira ◽  
Dulce Belo ◽  
Isabel Cordeiro Santos ◽  
Sandra Rabaça ◽  
Manuel Almeida
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Triethyl Phosphite ◽  
High Yield ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cross Coupling Reaction ◽  
Uv Visible

A dissymmetric TTF-type electron donor, cyanobenzene-ethylenedithio-tetrathiafulvalene (CNB-EDT-TTF), was obtained in high yield, by a cross-coupling reaction with triethyl phosphite between 2-thioxobenzo[d][1,3]dithiole-5-carbonitrile and 5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-one. This new donor was characterized namely by single crystal X-ray diffraction, cyclic voltammetry, NMR, UV-visible and IR spectroscopy.

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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