Enhanced catalytic performance of Pd–Pt nanodendrites for ligand-free Suzuki cross-coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28467-28473 ◽  
Author(s):  
Zheng-Jun Wang ◽  
Jing-Jing Lv ◽  
Jiu-Ju Feng ◽  
Ningbo Li ◽  
Xinhua Xu ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Wet Chemical Method ◽  
One Pot ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Ligand Free ◽  
Wet Chemical

The Pd–Pt NDs were synthesized by a one-pot wet-chemical method, which showed enhanced catalytic activity toward Suzuki cross-coupling reaction.

scholarly journals Sequential In-catalyzed intramolecular hydroarylation and Pd-catalyzed cross-coupling reactions using bromopropargyl aryl ethers and amines

2017 ◽  
Vol 4 (4) ◽  
pp. 500-505 ◽  
Author(s):  
Lorena Alonso-Marañón ◽  
Luis A. Sarandeses ◽  
M. Montserrat Martínez ◽  
José Pérez Sestelo
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
One Pot ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Aryl Ethers

A sequential one-pot In-catalyzed intramolecular hydroarylation and Pd-catalyzed cross-coupling reaction using bromopropargyl aryl ethers and amines has been developed.

NiNPs@rGO Nanocomposites as Heterogenous Catalysts for Thiocarboxylation Cross-Coupling Reactions

Synthesis ◽  
2021 ◽  
Author(s):  
Lorenzo Lombardi ◽  
Raffaello Mazzaro ◽  
Massimo Gazzano ◽  
Alessandro Kovtun ◽  
Vittorio Morandi ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Metal Composite ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Ligand Free ◽  
New Type ◽  
High Yields ◽  
Vinyl Derivatives

A new type of ligand-free Ni-nanoparticles supported on rGO (size distribution average d = 9 ± 3 nm) is prepared and fully characterized via morphological (Fe-SEM), structural (P-XRD, HR-TEM) and spectroscopic (ICP-EOS, XPS) analysis tools. The metal composite was effectively employed in the unprecedented heterogeneously Ni-assisted cross-coupling reaction of aryl/vinyl iodides and thiocarboxylates. A range of sulphur-containing aryl as well as vinyl derivatives (15 examples) was achieved in high yields (up to 82%), mild reaction conditions and wide functional group tolerance.

scholarly journals Copper-Promoted One-Pot Approach: Synthesis of Benzimidazoles

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1788
Author(s):  
S. N. Murthy Boddapati ◽  
Ramana Tamminana ◽  
Ravi Kumar Gollapudi ◽  
Sharmila Nurbasha ◽  
Mohamed E. Assal ◽  
...  
Keyword(s):  
Copper Catalyst ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
One Pot ◽  
Catalytic Systems ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Substrate Tolerance ◽  
High Yields

A facile, one-pot, and proficient method was developed for the production of various 2-arylaminobenzimidazoles. This methodology is based for the first time on a copper catalyst promoted domino C–N cross-coupling reaction for the generation of 2-arylaminobenzimidazoles. Mechanistic investigations revealed that the synthetic pathway involves a copper-based desulphurization/nucleophilic substitution and a subsequent domino intra and intermolecular C–N cross-coupling reactions. Some of the issues typically encountered during the synthesis of 2-arylaminobezimidazoles, including the use of expensive catalytic systems and the low reactivity of bromo precursors, were addressed using this newly developed copper-catalyzed method. The reaction procedure is simple, generally with excellent substrate tolerance, and provides good to high yields of the desired products.

On direct iron-catalyzed cross-coupling reactions

2010 ◽  
Vol 82 (7) ◽  
pp. 1545-1553 ◽  
Author(s):  
Waldemar Maximilian Czaplik ◽  
Matthias Mayer ◽  
Sabine Grupe ◽  
Axel Jacobi von Wangelin
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Alkyl Halides ◽  
Coupling Reactions ◽  
One Pot ◽  
Iron Catalysis ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Direct Cross

A new methodology for the direct cross-coupling reaction between aryl halides and alkyl halides under iron catalysis is described. Unlike conventional protocols, the direct cross-coupling obviates the need for the preformation of stoichiometric amounts of Grignard species and thus exhibits a reduced hazard potential. The underlying one-pot reaction involves iron-catalyzed Grignard formation followed by a rapid cross-coupling step. Mechanistic data on the role of N,N,N',N'-tetramethylethylenediamine (TMEDA) as additive, the concentration of intermediates, and the nature of the catalyst species are discussed.

Heck Cross- Coupling Reactions in Ionic Liquid mediated Pd Nanocatalysts

2020 ◽  
Vol 17 ◽  
Author(s):  
Prashant Gautam ◽  
Vivek Srivastava
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Catalyst Recycling ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Metal Precursors ◽  
Terminal Olefins ◽  
Palladium Metal

: We straightforwardly synthesized 18 different types of palladium nanoparticles by using a series of palladium metal precursors and ionic liquids. All the materials went for XRD, TEM, and ICP-OES analysis, before going to Heck cross-coupling reaction as a catalyst. We evaluated the catalytic performance of our developed IL#Pd MNP catalyst over Heck cross-coupling reaction between different terminal olefins with various 3-iodo-benzopyrones, including sterically hindered, electron-rich, electron neutral and electron-deficient systems. We obtained the Heck cross-coupling reaction product in good to average yield under phosphine free reaction condition with an added advantage of 6 times catalyst recycling.

Preparation and catalytic performance of a molecularly imprinted Pd complex catalyst for Suzuki cross-coupling reactions

2017 ◽  
Vol 46 (10) ◽  
pp. 3125-3134 ◽  
Author(s):  
Satoshi Muratsugu ◽  
Niladri Maity ◽  
Hiroshi Baba ◽  
Masahiro Tasaki ◽  
Mizuki Tada
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Complex Catalyst ◽  
Molecularly Imprinted ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Shape Selective

A molecularly imprinted Pd complex catalyst was successfully designed and prepared on a SiO2 surface for shape-selective Suzuki cross-coupling reaction.

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.

The Synthesis of Pharmaceuticals: The Effective Application of Secondary Boronic Esters in Enantioselective Suzuki ‐ Miyaura Cross ‐ Coupling Reactions

2016 ◽  
Author(s):  
Jonathon Moir
Keyword(s):  
Natural Products ◽  
Human Life ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Boronic Esters ◽  
Carbon Carbon Bonds ◽  
Effective Drugs

Pharmaceuticals and drugs have become an indispensable part of human life. Presently, a myriad of different drugs are available for a variety of mental and physical health concersn. The synthesis of these drugs, however, remains an elusive and often difficult aspect of the industry. The importance of chirality, or "handedness", in the synthesis of natural products is paramount, as any given pair of enantiomers can have widely differing physiological effects. As such, the ability to control the enantioselectivity of a reaction is of the utmost importance. One example of a facile method used to form carbon-carbon bonds is the Suzuki-Miyaura cross-coupling reaction. Not only is this reaction effective at coupling primary organoboronic esters with organohalides, but recent work in the Crudden group in the Department of Chemistry has revealed an effective method of also cross-couplingchiral secondary organoboronic esters with good retention of stereochemistry. This work, the first of its kind, is crucial in developing single-handed natural products for a wide array of applications, including applications in the pharmaceutical industry. The end result is safer and more effective drugs for distribution to the general public. To expand the scope of this project, new substrates are currently being synthesized for cross-coupling applications. The overall goal is to improve upon current methodologies, while helping to meet the industrial and academic needs of the future.  

Regiospecific Palladium-Catalyzed Cross-Coupling Reactions Using the Operational Equivalent of 1,3-Dilithiopropyne

Synthesis ◽  
2020 ◽  
Vol 52 (16) ◽  
pp. 2387-2394 ◽  
Author(s):  
Jorge A. Cabezas ◽  
Natasha Ferllini
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Terminal Alkyne ◽  
Copper Iodide ◽  
Reaction Conditions ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed ◽  
High Yields

A regiospecific palladium-catalyzed cross-coupling reaction using the operational equivalent of the dianion 1,3-dilithiopropyne, with aromatic iodides is reported. This reaction gives high yields of 1-propyn-1-yl-benzenes and 2-(propyn-1-yl)thiophenes in the presence of catalytic amounts of palladium(0) or (II) and stoichiometric amounts of copper iodide. No terminal alkyne or allene isomers were detected. Reaction conditions were very mild and several functional groups were tolerated.

scholarly journals Synthesis of 4-Alkyl-4H-1,2,4-triazole Derivatives by Suzuki Cross-coupling Reactions and Their Luminescence Properties

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 652 ◽  
Author(s):  
Monika Olesiejuk ◽  
Agnieszka Kudelko ◽  
Marcin Swiatkowski ◽  
Rafal Kruszynski
Keyword(s):  
Ionic Liquids ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Boronic Acids ◽  
Luminescence Properties ◽  
Coupling Reactions ◽  
Triazole Derivatives ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Derivatives Of

New derivatives of 4-alkyl-3,5-diaryl-4H-1,2,4-triazole were synthesized utilizing the Suzuki cross-coupling reaction. The presented methodology comprises of the preparation of bromine-containing 4-alkyl-4H-1,2,4-triazoles and their coupling with different commercially available boronic acids in the presence of ionic liquids or in conventional solvents. The obtained compounds were tested for their luminescence properties.

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