Hybrid Thiophosphoryl–Benzothiazole Palladium SCN-Pincer Complexes: Synthesis and Effect of Structure Modifications on Catalytic Performance in the Suzuki Cross-Coupling

2011 ◽  
Vol 30 (11) ◽  
pp. 2920-2932 ◽  
Author(s):  
Vladimir A. Kozlov ◽  
Diana V. Aleksanyan ◽  
Yulia V. Nelyubina ◽  
Konstantin A. Lyssenko ◽  
Pavel V. Petrovskii ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Catalytic Performance ◽  
Pincer Complexes ◽  
Effect Of Structure

scholarly journals Robust and efficient hydrogenation of carbonyl compounds catalysed by mixed donor Mn(I) pincer complexes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenjun Yang ◽  
Ivan Yu. Chernyshov ◽  
Robin K. A. van Schendel ◽  
Manuela Weber ◽  
Christian Müller ◽  
...  
Keyword(s):  
Noble Metal ◽  
Crucial Role ◽  
Carbonyl Compounds ◽  
Catalytic Performance ◽  
Hydrogen Atmosphere ◽  
Pincer Complexes ◽  
Catalyst Activation ◽  
Hydrogenation Catalysts ◽  
Induction Times

AbstractAny catalyst should be efficient and stable to be implemented in practice. This requirement is particularly valid for manganese hydrogenation catalysts. While representing a more sustainable alternative to conventional noble metal-based systems, manganese hydrogenation catalysts are prone to degrade under catalytic conditions once operation temperatures are high. Herein, we report a highly efficient Mn(I)-CNP pre-catalyst which gives rise to the excellent productivity (TOF° up to 41 000 h−1) and stability (TON up to 200 000) in hydrogenation catalysis. This system enables near-quantitative hydrogenation of ketones, imines, aldehydes and formate esters at the catalyst loadings as low as 5–200 p.p.m. Our analysis points to the crucial role of the catalyst activation step for the catalytic performance and stability of the system. While conventional activation employing alkoxide bases can ultimately provide catalytically competent species under hydrogen atmosphere, activation of Mn(I) pre-catalyst with hydride donor promoters, e.g. KHBEt3, dramatically improves catalytic performance of the system and eliminates induction times associated with slow catalyst activation.

scholarly journals Pd–Ni Bimetallic Nanoparticles Supported on Zro2 as an Efficient Catalyst for Suzuki–Miyaura Reactions

2018 ◽  
Vol 42 (8) ◽  
pp. 419-423
Author(s):  
Li-Jie Zhang ◽  
Xian Yao ◽  
Ying-xin Sun ◽  
Jia-wei Zhang ◽  
Chun Cai
Keyword(s):  
Reduction Method ◽  
Bimetallic Nanoparticles ◽  
Bimetallic Catalyst ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reactions ◽  
Excellent Catalytic Performance

Pd–Ni bimetallic nanoparticles (BMNPs) supported on ZrO2 were prepared by an impregnation–reduction method. The BMNPs showed excellent catalytic performance in Suzuki carbon–carbon cross-coupling reactions and almost quantitative conversion of the substrates was obtained under mild conditions in the absence of ligand. The excellent catalytic performance of the bimetallic catalyst could be a result of the synergistic effect between the two metal components. The catalyst showed outstanding recyclability during the reaction process; no obvious decrease in catalytic performance was observed after five cycles.

scholarly journals New symmetrical N^N^N palladium(II) pincer complexes: synthesis, characterization and catalytic evaluation in the Suzuki-Miyaura cross-coupling reaction

ARKIVOC ◽  
2020 ◽  
Vol 2020 (3) ◽  
pp. 103-119
Author(s):  
Robert S. Yafele ◽  
Tommy F. Mabasa ◽  
Banele Vatsha ◽  
Banothile C.E. Makhubela ◽  
Henok H. Kinfe
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Pincer Complexes ◽  
Cross Coupling Reaction

scholarly journals Pd(CH3CN)2Cl2/Pipecolinic Acid as a Highly Efficient Catalytic System for Suzuki-Miyaura Cross-coupling Reaction of Bromoaryl Carboxylic Acids in Water

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 86 ◽  
Author(s):  
Xiaogang Li ◽  
Wenbin Zhang ◽  
Leiqing Fu ◽  
Mengping Guo
Keyword(s):  
Catalytic System ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
High Turnover ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Cross Coupling Reaction ◽  
Pipecolinic Acid ◽  
Excellent Catalytic Performance

In this study, a convenient and highly efficient catalytic system for the Suzuki-Miyaura coupling reaction was investigated under mild conditions. A combination of Pd(CH3CN)2Cl2 and pipecolinic acid showed excellent catalytic performance and afforded high turnover numbers; turnover numbers were up to 4.9 × 105 for the coupling reaction of 4-bromobenzoic acid and tetraphenylboron sodium. The catalytic system was also effective for the indexes of 4-bromobenzoic acid, and high turnover numbers were obtained.

scholarly journals Iron Pincer Complexes as Catalysts in Cross-coupling of Aryl Halides and Phenylboronic Acid

2018 ◽  
Vol 7 (4.5) ◽  
pp. 428
Author(s):  
Lolakshi Mahesh Kumar ◽  
Badekai Ramachandra Bhat
Keyword(s):  
Phenylboronic Acid ◽  
Coupling Efficiency ◽  
Cross Coupling ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Alternative Approach ◽  
Active Metal ◽  
Phenyl Boronic Acid ◽  
Pcp Complexes ◽  
Coupling Yield

Pincer complexes with iron as active metal center were synthesized to study their catalytic activity in Suzuki-Miyaura coupling reactions. Tridentate pincer ligand was synthesized by the reaction of diphenylchlorophosphine with m-aminophenol and m-phenylenediamine respectively in a 2:1 ratio in the presence of triethylamine as a base and tetrahydrofuran as solvent media. The resultant ligand was complexed with FeSO4 to obtain PCP complexes, C-1 with O and N atoms in the side arms and C-2 with both N atoms in the side arms. The synthesized complexes were examined for their C-C coupling efficiency in cross-coupling between phenyl boronic acid and para substituted halobenzenes. The research study aims to provide an alternative approach to the Pd catalyzed cross coupling methods, an otherwise subjugated method to obtain cross-coupled products. Also the study implores on the effect of variation in the side arm atom relating to the donating ability of the ligand and thereby relatively affecting the coupling yield of the catalysts.  

Air-Stable Triazine-Based Ni(II) PNP Pincer Complexes As Catalysts for the Suzuki–Miyaura Cross-Coupling

2016 ◽  
Vol 18 (13) ◽  
pp. 3186-3189 ◽  
Author(s):  
Matthias Mastalir ◽  
Berthold Stöger ◽  
Ernst Pittenauer ◽  
Günter Allmaier ◽  
Karl Kirchner
Keyword(s):  
Cross Coupling ◽  
Pincer Complexes
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