scholarly journals N,N-Dimethylformamide-stabilized copper nanoparticles as a catalyst precursor for Sonogashira–Hagihara cross coupling

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 22869-22874 ◽  
Author(s):  
Hideo Oka ◽  
Katsuya Kitai ◽  
Takeyuki Suzuki ◽  
Yasushi Obora
Keyword(s):  
Catalytic Activity ◽  
Copper Nanoparticles ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Catalytic Activity ◽  
Catalyst Precursor ◽  
Cross Coupling Reaction

We found that DMF-stabilized Cu NPs have high catalytic activity in the Sonogashira cross-coupling reaction at low catalyst loadings (0.2 mol%).

scholarly journals SCREENING OF THE CATALYTIC ACTIVITY OF Pd0 AND Pd2+- SUPPORTED ON CHITOSAN BEADS AND CRYOGELS

2018 ◽  
Vol XXIII ◽  
pp. 149-158
Author(s):  
Aleksandr Pestov ◽  
Aleksandr Mekhaev ◽  
Yuliya Privar ◽  
Natalya Prokuda ◽  
Evgeniy Modin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
High Catalytic Activity ◽  
Mesomeric Effect ◽  
Catalytic Systems ◽  
Chitosan Beads ◽  
Cross Coupling Reaction ◽  
Significant Difference

Here, we report the results of screening of the catalytic activity of Pd-containing chitosan beads and cryogels in the cross-coupling reaction, hydrogenation of alkenes, nitro-, and carbonyl compounds and the hydrodechlorination of chlorophenols. Pd0-containing chitosan beads and cryogels show moderate catalytic activity in the reduction of alkenes and nitroaromatics. The conversion of nitroaromatics decreases for substrates with electron-withdrawing substituents, while the conversion of alkenes increases with the activation of carbon-carbon double bonds. For several substrates, a significant difference in kinetics and conversion degrees was observed for Pd nanoparticles supported on chitosan beads and cryogels. It was found that conversion in the hydrodechlorination reaction depends on substrate structure, being higher for substrates containing substituents with a positive mesomeric effect. Pd2+-chitosan catalysts showed high catalytic activity in cross-coupling (Heck reaction) offering the following advantages over known catalytic systems: lower reaction temperature, the selective functionalisation of C-I bonds, and the possibility to perform reactions with iodobenzene without base addition.

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.

Fabrication of a Fe3O4@SiO2@mSiO2-HPG-COOH-Pd(0) supported catalyst and its performance in catalyzing the Suzuki cross-coupling reaction

2015 ◽  
Vol 39 (4) ◽  
pp. 2767-2777 ◽  
Author(s):  
Wei Li ◽  
Yi Tian ◽  
Baoliang Zhang ◽  
Lei Tian ◽  
Xiangjie Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Supported Catalyst ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Catalytic Activity ◽  
Cross Coupling Reaction

A novel Fe3O4@SiO2@mSiO2-HPG-COOH-Pd(0) catalyst with high catalytic activity and stability was successfully synthesized.

Palladium-Schiff-base-silica framework as a robust and recyclable catalyst for Suzuki–Miyaura cross-coupling in aqueous media

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38085-38092 ◽  
Author(s):  
Tahshina Begum ◽  
Manoj Mondal ◽  
Pradip K. Gogoi ◽  
Utpal Bora
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Room Temperature ◽  
Aqueous Media ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Recyclable Catalyst ◽  
Cross Coupling Reaction

A novel Pd@imine-SiO2 catalyst was prepared and found to exhibit excellent catalytic activity in a Suzuki-Miyaura cross-coupling reaction under aqueous media at room temperature.

A palladium–carbon-connected organometallic framework and its catalytic application

2019 ◽  
Vol 55 (96) ◽  
pp. 14414-14417 ◽  
Author(s):  
Ying Dong ◽  
Jing-Jing Jv ◽  
Xiao-Wei Wu ◽  
Jing-Lan Kan ◽  
Ting Lin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Application ◽  
Cross Coupling Reaction

A Pd–C-bond-connected organometallic framework and its catalytic activity for the Suzuki–Miyaura cross-coupling reaction were reported.

Palladium(II)-pivaloyl thiourea complexes: Synthesis, characterisation and their catalytic activity in mild Sonogashira cross-coupling reaction

2020 ◽  
Vol 756 ◽  
pp. 137842
Author(s):  
Wan M. Khairul ◽  
Falynee Faha Abdul Wahab ◽  
Siti Kamilah Che Soh ◽  
Mustaffa Shamsuddin ◽  
Adibah Izzati Daud
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction

Structural features influencing the activity of bis-biguanide ligands in the Suzuki–Miyaura cross-coupling reaction in neat water

2020 ◽  
Vol 98 (9) ◽  
pp. 547-553
Author(s):  
Solène Fortun ◽  
Philippe Beauclair ◽  
Andreea R. Schmitzer
Keyword(s):  
Catalytic Activity ◽  
Green Chemistry ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Structural Features ◽  
Catalytic Reactions ◽  
Neat Water ◽  
Cross Coupling Reaction ◽  
Integral Role ◽  
Reaction In Water

Catalytic reactions play an integral role in the development of green chemistry. Herein, we report new bis-biguanide compounds containing alkyl and aryl spacers as ligands for the Suzuki–Miyaura cross-coupling reaction in water. These ligands show similar catalytic activity to metformin independently of the nature of the spacer between the two biguanide units.

A tyrosine-rich peptide induced flower-like palladium nanostructure and its catalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 78026-78029 ◽  
Author(s):  
Young-O Kim ◽  
Hyung-Seok Jang ◽  
Yo-han Kim ◽  
Jae Myoung You ◽  
Yong-Sun Park ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Activities ◽  
Cross Coupling Reaction ◽  
Reaction In Water

​Flower-like palladium nanostructure (Pd nano-flower) induced by tyrosine-rich peptide, Tyr-Tyr-Ala-His-Ala-Tyr-Tyr (YYAHAYY), showed excellent catalytic activities in copper-free Sonogashira cross-coupling reaction in water.

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