Designing of Ferromagnetic 3D Hierarchical Core‐Shell Fe 3 O 4 @NiO/Co 3 O 4 Microspheres Derived from a MOF Precursor: As an Efficient Catalyst for C‐P Cross Coupling Reaction

2019 ◽  
Vol 4 (43) ◽  
pp. 12455-12463
Author(s):  
Arezou Mohammadinezhad ◽  
Batool Akhlaghinia
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Core Shell ◽  
Efficient Catalyst ◽  
Cross Coupling Reaction

scholarly journals A New Heterogeneous Catalyst Obtained via Supramolecular Decoration of Graphene with a Pd2+ Azamacrocyclic Complex

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2714 ◽  
Author(s):  
Matteo Savastano ◽  
Paloma Arranz-Mascarós ◽  
Maria Paz Clares ◽  
Rafael Cuesta ◽  
Maria Luz Godino-Salido ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Self Assembly ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Assembly Process ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Green Procedure

A new G-(H2L)-Pd heterogeneous catalyst has been prepared via a self-assembly process consisting in the spontaneous adsorption, in water at room temperature, of a macrocyclic H2L ligand on graphene (G) (G + H2L = G-(H2L)), followed by decoration of the macrocycle with Pd2+ ions (G-(H2L) + Pd2+ = G-(H2L)-Pd) under the same mild conditions. This supramolecular approach is a sustainable (green) procedure that preserves the special characteristics of graphene and furnishes an efficient catalyst for the Cu-free Sonogashira cross coupling reaction between iodobenzene and phenylacetylene. Indeed, G-(H2L)-Pd shows an excellent conversion (90%) of reactants into diphenylacetylene under mild conditions (50 °C, water, aerobic atmosphere, 14 h). The catalyst proved to be reusable for at least four cycles, although decreasing yields down to 50% were observed.

A Highly Efficient Catalyst for the Suzuki Cross-coupling Reaction of 3-Chloro-5-oxadiazol-2-yl Pyridine

2014 ◽  
Vol 52 (6) ◽  
pp. 1748-1757 ◽  
Author(s):  
A. M. Sajith ◽  
K. K. Abdul Khader ◽  
A. Muralidharan ◽  
M. S. Ali Padusha ◽  
H. P. Nagaswarupa
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Cross Coupling Reaction

scholarly journals Polyaniline-Supported Palladium(II)-Schiff Base Complex as Efficient Catalyst for Mizoroki-Heck Cross-Coupling Reaction

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Siti Kamilah Che Soh ◽  
Mustaffa Shamsuddin
Keyword(s):  
Mixed Solvent ◽  
Heterogeneous Reaction ◽  
Supported Catalyst ◽  
Schiff Base Complex ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Bet Surface Area ◽  
Efficient Catalyst ◽  
Cross Coupling Reaction ◽  
Supported Palladium

Mizoroki-Heck cross-coupling reaction of 4-bromoacetophenone with methyl acrylate were investigated as a model system of heterogeneous reaction in order to evaluate the performance of polyaniline supported N,N’-bis(3,5-di-tert-butylsalicylidene)propane-1,3-diaminepalladium(II) complex as catalyst. The reactions were carried out in both N,N-dimethylacetamide (DMAc) and water-DMAc mixed solvent. The performances of the catalyst in both media are comparable, giving more than 90 % conversion after 24 hours of reaction with 100 % selectivity and high isolated product yields of cinnamic esters were obtained. The used of mixed solvent gave more advantages such as less organic solvent was required and an enhanced recyclability in which the supported catalyst could be reusable at least four times without noticeable decrease in the product conversion. The properties of the catalyst was characterized by various techniques such as FTIR spectroscopy, TG-DTA, AAS, BET surface area, XRD and FESEM.

scholarly journals Microwave-Accelerated N-Acylation of Sulfoximines with Aldehydes under Catalyst-Free Conditions

Synthesis ◽  
2020 ◽  
Vol 52 (08) ◽  
pp. 1279-1286
Author(s):  
Kamal K. Rajbongshi ◽  
Srinivas Ambala ◽  
Thavendran Govender ◽  
Hendrik G. Kruger ◽  
Per I. Arvidsson ◽  
...  
Keyword(s):  
Free Radical ◽  
Microwave Irradiation ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Aromatic Aldehydes ◽  
Efficient Catalyst ◽  
Radical Initiator ◽  
Catalyst Free ◽  
Broad Scope ◽  
Cross Coupling Reaction

An efficient catalyst-free radical cross-coupling reaction between aromatic aldehydes and sulfoximines was developed. The reaction took place in the presence of N-bromosuccinimide as the radical initiator under microwave irradiation to afford the corresponding acylated sulfoximines in moderate to excellent yields (27 examples). This protocol proved to be rapid, easy to handle, and applicable to a broad scope of substrates.

Core–shell PdCu bimetallic colloidal nanoparticles in Sonogashira cross-coupling reaction: mechanistic insights into the catalyst mode of action

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 1171-1179 ◽  
Author(s):  
Drielly N. Olekszyszen ◽  
Brunno L. Albuquerque ◽  
Dagoberto de O. Silva ◽  
Guilherme L. Tripodi ◽  
Daniela C. de Oliveira ◽  
...  
Keyword(s):  
Mode Of Action ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Colloidal Nanoparticles ◽  
Core Shell ◽  
Sonogashira Coupling ◽  
Cross Coupling Reaction

PdCu bimetallic colloidal nanoparticles-catalyzed Sonogashira coupling is demonstrated proceed by a quasi-homogeneous pathway with involvement of an alkynylcopper intermediate.

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