scholarly journals Microflowers formed by complexation-driven self-assembly between palladium(ii) and bis-theophyllines: immortal catalyst for C–C cross-coupling reactions

RSC Advances ◽  
2021 ◽  
Vol 11 (56) ◽  
pp. 35311-35320
Author(s):  
Katsuya Kaikake ◽  
Naoki Jou ◽  
Go Shitara ◽  
Ren-Hua Jin
Keyword(s):  
Catalytic Activity ◽  
Self Assembly ◽  
Palladium Complex ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Cross Coupling Reactions

Bis-theophylline-palladium complex exhibit high catalytic activity in the C–C coupling reaction with excellent recyclability in the presence of NaCl.

scholarly journals Modified ultradispersed diamonds based catalytic systems in cross-coupling reactions

2021 ◽  
Vol 57 (1) ◽  
pp. 7-14
Author(s):  
A. A. Lugovski ◽  
G. A. Gusakov ◽  
M. P. Samtsov ◽  
V. A. Parhomenko ◽  
S. V. Adamchyk
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Model Systems ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Catalytic Systems ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Metallic Palladium

Methods for preparation of nanocomposites of modified detonation nanodiamonds (DND) with metallic palladium have been developed and their catalytic activity in the Suzuki-Miyaura cross-coupling reaction in various reaction media has been studied. Methods for the regeneration of palladium-containing nanocomposites from the reaction mixture have been developed. The high catalytic activity of nanocomposites is confirmed by kinetic analysis based on the results of chromatographic analysis of the reaction mixture and is comparable to the literature data about similar catalytic systems. Regenerated nanocomposites showed the retention of catalytic activity for 3 consecutive cross-coupling cycles on model systems.

A highly efficient catalyst for Suzuki–Miyaura coupling reaction of benzyl chloride under mild conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36437-36443 ◽  
Author(s):  
Zhenhong Guan ◽  
Buyi Li ◽  
Guoliang Hai ◽  
Xinjia Yang ◽  
Tao Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Benzyl Chloride ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Microporous Polymers ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Cross Coupling Reactions

Microporous polymers with built-in triphenylphosphine palladium exhibit highly efficient catalytic activity for cross-coupling reactions of benzyl chloride under mild conditions.

Pd/Indanone-Based Ligands: An Efficient Catalyst System for Ullmann­-Type, Suzuki–Miyaura, and Mizoroki–Heck Cross-Coupling Reactions with Aryl Tosylates and Aryl Halides

Synthesis ◽  
2017 ◽  
Vol 49 (18) ◽  
pp. 4372-4382 ◽  
Author(s):  
Mohammed Waheed ◽  
Naseem Ahmed
Keyword(s):  
Catalytic Activity ◽  
Cross Coupling ◽  
Catalyst System ◽  
Aryl Halides ◽  
Maximum Efficiency ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Cross Coupling Reactions ◽  
Aryl Tosylates

2-Hydroxyindan-1-ones have been efficiently synthesized and successfully applied as ligands in Pd-catalyzed Ullmann type, Suzuki–Miyaura, and Mizoroki–Heck cross-coupling reactions with aryl tosylates and aryl halides. The ligands are air- and moisture-stable and have shown high catalytic activity with Pd(OAc)2 in these cross-coupling reactions. The system tolerates a variety of functional groups in the product and can be re-used at least three times with maximum efficiency.

scholarly journals Polyvinylpyrrolidone - Reduced Graphene Oxide - Pd Nanoparticles as an Efficient Nanocomposite for Catalysis Applications in Cross-Coupling Reactions

2019 ◽  
Vol 14 (3) ◽  
pp. 490
Author(s):  
Hany A. Elazab ◽  
Tamer T. El-Idreesy
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Cross Coupling ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Highly Active ◽  
Defect Sites ◽  
Reduced Graphene

This paper reported a scientific approach adopting microwave-assisted synthesis as a synthetic route for preparing highly active palladium nanoparticles stabilized by polyvinylpyrrolidone (Pd/PVP) and supported on reduced Graphene oxide (rGO) as a highly active catalyst used for Suzuki, Heck, and Sonogashira cross coupling reactions with remarkable turnover number (6500) and turnover frequency of 78000 h-1. Pd/PVP nanoparticles supported on reduced Graphene oxide nanosheets (Pd-PVP/rGO) showed an outstanding performance through high catalytic activity towards cross coupling reactions. A simple, reproducible, and reliable method was used to prepare this efficient catalyst using microwave irradiation synthetic conditions. The synthesis approach requires simultaneous reduction of palladium and in the presence of Gaphene oxide (GO) nanosheets using ethylene glycol as a solvent and also as a strong reducing agent. The highly active and recyclable catalyst has so many advantages including the use of mild reaction conditions, short reaction times in an environmentally benign solvent system. Moreover, the prepared catalyst could be recycled for up to five times with nearly the same high catalytic activity. Furthermore, the high catalytic activity and recyclability of the prepared catalyst are due to the strong catalyst-support interaction. The defect sites in the reduced Graphene oxide (rGO) act as nucleation centers that enable anchoring of both Pd/PVP nanoparticles and hence, minimize the possibility of agglomeration which leads to a severe decrease in the catalytic activity. Copyright © 2019 BCREC Group. All rights reserved 

scholarly journals Metformin as a versatile ligand for recyclable palladium-catalyzed cross-coupling reactions in neat water

RSC Advances ◽  
2017 ◽  
Vol 7 (34) ◽  
pp. 21036-21044 ◽  
Author(s):  
S. Fortun ◽  
P. Beauclair ◽  
A. R. Schmitzer
Keyword(s):  
Catalytic Activity ◽  
Cross Coupling ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Neat Water ◽  
Palladium Catalyzed

We present the high catalytic activity of an in situ generated palladium(ii)/metformin complex in neat water for the Suzuki–Miyaura and Sonogashira cross-coupling reactions.

Biosynthesis of poly(ethylene glycol)-supported palladium nanoparticles using Colocasia esculenta leaf extract and their catalytic activity for Suzuki–Miyaura cross-coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72453-72457 ◽  
Author(s):  
Raju Kumar Borah ◽  
Hirak Jyoti Saikia ◽  
Abhijit Mahanta ◽  
Vijay Kumar Das ◽  
Utpal Bora ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Poly Ethylene Glycol ◽  
Cross Coupling Reactions ◽  
Cross Coupling Reaction ◽  
Supported Palladium ◽  
Poly Ethylene ◽  
Supported Pd

A green and efficient method for the synthesis of PEG supported Pd-NPs has been developed using aqueous extract of C. esculanta leaf. The prepared NPs show excellent catalytic activity for Suzuki–Miyaura cross-coupling reaction at room temperature.

scholarly journals Synthesis, Photophysical Properties and Catalytic Activity of Ƙ3-SCS Pincer Palladium (II) Complex of N,N'-Di-Tert-Butylbenzene-1,3-Dicarbothioamide Supported by DFT Analysis

2021 ◽  
Author(s):  
Debasish Das ◽  
S. Kannan ◽  
Mukesh Kumar ◽  
Biswajit Sadhu ◽  
Liladhar B. Kumbhare
Keyword(s):  
Catalytic Activity ◽  
Uv Light ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
13C Nmr Spectroscopy ◽  
Coupling Reactions ◽  
X Ray ◽  
Cross Coupling Reactions ◽  
Vis Spectroscopy

The title complex [PdCl(L)] (1), is obtained from the reaction of SCS pincer ligand HL (where, HL = N,N'-di-tert-butylbenzene-1,3-dicarbothioamide) with lithium tetrachloropalladate (II) in methanol. The compound 1 is characterized by elemental analysis, FTIR, 1H, and 13C-NMR spectroscopy, UV-Vis spectroscopy, powder X-ray diffraction and X-ray crystallographic techniques. At room temperature, 1 emits luminescence light of wavelength 460 nm in the solid state upon excitation by UV light of wavelength 280 nm. The average emission lifetime indicates that, both the ligand and complex emission is fluorescence in nature and involves mainly ligand centers π-π* deexcitation. It also shows good catalytic activity towards Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions of aryl bromides with tert-butyl acrylate and p-tolylboronic acid respectively. For both type of reactions, more than 99% conversion of the substrates is found to occur for electronically activated p-nitro bromobenzene using 1 mol % of 1. Further, modern DFT calculations are performed to decipher the mechanistic insight on the preferable pathways of the Mizoroki-Heck cross-coupling reaction. Stepwise free energy of reactions for various probable reaction pathways suggest that the catalytic route has profound preference for Pd(0)-Pd(II) over Pd(II)-Pd(IV) pathway.<br>

Effect on orthometallation of NHC palladium complexes toward the catalytic activity studies in Suzuki coupling reaction

2017 ◽  
Vol 46 (47) ◽  
pp. 16394-16398 ◽  
Author(s):  
Ming-Tsz Chen ◽  
Zing-Lun Kao
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Suzuki Coupling ◽  
Palladium Complexes ◽  
Coupling Reactions ◽  
Suzuki Coupling Reaction ◽  
Cross Coupling Reactions

Herein, we report an approach to improve catalytic activity for cross-coupling reactions.

scholarly journals Synthesis, Photophysical Properties and Catalytic Activity of Ƙ3-SCS Pincer Palladium (II) Complex of N,N'-Di-Tert-Butylbenzene-1,3-Dicarbothioamide Supported by DFT Analysis

2021 ◽  
Author(s):  
Debasish Das ◽  
S. Kannan ◽  
Mukesh Kumar ◽  
Biswajit Sadhu ◽  
Liladhar B. Kumbhare
Keyword(s):  
Catalytic Activity ◽  
Uv Light ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
13C Nmr Spectroscopy ◽  
Coupling Reactions ◽  
X Ray ◽  
Cross Coupling Reactions ◽  
Vis Spectroscopy

The title complex [PdCl(L)] (1), is obtained from the reaction of SCS pincer ligand HL (where, HL = N,N'-di-tert-butylbenzene-1,3-dicarbothioamide) with lithium tetrachloropalladate (II) in methanol. The compound 1 is characterized by elemental analysis, FTIR, 1H, and 13C-NMR spectroscopy, UV-Vis spectroscopy, powder X-ray diffraction and X-ray crystallographic techniques. At room temperature, 1 emits luminescence light of wavelength 460 nm in the solid state upon excitation by UV light of wavelength 280 nm. The average emission lifetime indicates that, both the ligand and complex emission is fluorescence in nature and involves mainly ligand centers π-π* deexcitation. It also shows good catalytic activity towards Mizoroki-Heck and Suzuki-Miyaura cross-coupling reactions of aryl bromides with tert-butyl acrylate and p-tolylboronic acid respectively. For both type of reactions, more than 99% conversion of the substrates is found to occur for electronically activated p-nitro bromobenzene using 1 mol % of 1. Further, modern DFT calculations are performed to decipher the mechanistic insight on the preferable pathways of the Mizoroki-Heck cross-coupling reaction. Stepwise free energy of reactions for various probable reaction pathways suggest that the catalytic route has profound preference for Pd(0)-Pd(II) over Pd(II)-Pd(IV) pathway.<br>

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