scholarly journals Design and synthesis of Fe3O4@SiO2@KIT-6@DTZ-Pd0 as a new and efficient mesoporous magnetic catalyst in carbon–carbon cross-coupling reactions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zahra Moradi ◽  
Arash Ghorbani-Choghamarani
Keyword(s):  
Mesoporous Silica ◽  
Mesoporous Material ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Mesoporous Catalyst ◽  
Magnetic Catalyst ◽  
Design And Synthesis ◽  
Cross Coupling Reactions ◽  
New Type ◽  
Ft Ir

AbstractIn this paper, a new type of mesoporous material based on KIT-6 has been introduced. In this aim, magnetic Fe3O4 nanoparticles and mesoporous silica KIT-6 have been combined to obtain mesoporous MNPs. The prepared magnetic mesoporous catalyst has been applied in different carbon–carbon cross-coupling reactions including Mizoroki–Heck, Suzuki–Miyaura, and Stille reactions. This magnetic mesoporous compound is characterized by various techniques including FT-IR, BET, VSM, SEM, XRD, and TGA.

scholarly journals Well-Defined Pre-Catalysts in Amide and Ester Bond Activation

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 215 ◽  
Author(s):  
Sandeep R. Vemula ◽  
Michael R. Chhoun ◽  
Gregory R. Cook
Keyword(s):  
Transition Metal ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Cross Coupling ◽  
Ester Bond ◽  
Coupling Reactions ◽  
Catalytic Systems ◽  
Design And Synthesis ◽  
Cross Coupling Reactions ◽  
Made In

Over the past few decades, transition metal catalysis has witnessed a rapid and extensive development. The discovery and development of cross-coupling reactions is considered to be one of the most important advancements in the field of organic synthesis. The design and synthesis of well-defined and bench-stable transition metal pre-catalysts provide a significant improvement over the current catalytic systems in cross-coupling reactions, avoiding excess use of expensive ligands and harsh conditions for the synthesis of pharmaceuticals, agrochemicals and materials. Among various well-defined pre-catalysts, the use of Pd(II)-NHC, particularly, provided new avenues to expand the scope of cross-coupling reactions incorporating unreactive electrophiles, such as amides and esters. The strong σ-donation and tunable steric bulk of NHC ligands in Pd-NHC complexes facilitate oxidative addition and reductive elimination steps enabling the cross-coupling of broad range of amides and esters using facile conditions contrary to the arduous conditions employed under traditional catalytic conditions. Owing to the favorable catalytic activity of Pd-NHC catalysts, a tremendous progress was made in their utilization for cross-coupling reactions via selective acyl C–X (X=N, O) bond cleavage. This review highlights the recent advances made in the utilization of well-defined pre-catalysts for C–C and C–N bond forming reactions via selective amide and ester bond cleavage.

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.

Recent Developments and Perspectives in the C-Se Cross Coupling Reactions

2020 ◽  
Vol 24 (11) ◽  
pp. 1230-1262 ◽  
Author(s):  
Diana Elizabeth Jose ◽  
U. S. Kanchana ◽  
Thomas V. Mathew ◽  
Gopinathan Anilkumar
Keyword(s):  
Cross Coupling ◽  
Environmentally Benign ◽  
Coupling Reactions ◽  
Organoselenium Compounds ◽  
Bond Forming ◽  
Design And Synthesis ◽  
Cross Coupling Reactions ◽  
Material Interest ◽  
Recent Developments ◽  
Low Toxicity

: The C-Se bond forming reactions are attractive synthetic strategies for biochemists and synthetic chemists alike for the synthesis of various molecules that are of biological, pharmaceutical and material interest. Therefore, the design and synthesis of organoselenium compounds currently constitute engaging fundamental problems in applied chemistry both in pharmaceutical and academic laboratories. This review discusses the recent works reported in carbon–selenium cross-coupling reactions with the emphasis on the mechanistic aspects of the reactions. The reacting species, the addition of ligands, selection of catalysts, use of suitable solvents, proper setting of reaction time, are well discussed to understand the detailed mechanism. Various simple, economical and environmentally friendly protocols are demonstrated, which ensured product stability, low toxicity, environmentally benign and excellent reactivity for the synthesis of organoselenium compounds. This review covers the scientific literature from 2010 to 2019.

Fe3O4@Boehmite-NH2-CoII NPs: an inexpensive and highly efficient heterogeneous magnetic nanocatalyst for the Suzuki–Miyaura and Heck–Mizoroki cross-coupling reactions

2017 ◽  
Vol 19 (23) ◽  
pp. 5625-5641 ◽  
Author(s):  
Arezou Mohammadinezhad ◽  
Batool Akhlaghinia
Keyword(s):  
Cross Coupling ◽  
Coupling Reactions ◽  
Magnetic Nanocatalyst ◽  
Magnetic Catalyst ◽  
Highly Efficient ◽  
Cross Coupling Reactions ◽  
Boehmite Nanoparticles

CoII immobilized on aminated Fe3O4@Boehmite nanoparticles as a heterogeneous magnetic catalyst for cross-coupling reactions was investigated.

scholarly journals Surface-active ionic liquids for palladium-catalysed cross coupling in water: effect of ionic liquid concentration on the catalytically active species

RSC Advances ◽  
2017 ◽  
Vol 7 (65) ◽  
pp. 41144-41151 ◽  
Author(s):  
Meltem Taskin ◽  
Alice Cognigni ◽  
Ronald Zirbs ◽  
Erik Reimhult ◽  
Katharina Bica
Keyword(s):  
Ionic Liquids ◽  
Cross Coupling ◽  
Active Species ◽  
Coupling Reactions ◽  
Water Effect ◽  
Design And Synthesis ◽  
Cross Coupling Reactions ◽  
Catalytically Active ◽  
Palladium Catalyzed ◽  
Surface Active

We report the design and synthesis of surface-active ionic liquids for application in palladium-catalyzed cross coupling reactions.

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.

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