In Situ Generation of Highly Active Dissolved Palladium Species from Solid Catalysts—A Concept for the Activation of Aryl Chlorides in the Heck Reaction

2004 ◽  
Vol 43 (14) ◽  
pp. 1881-1882 ◽  
Author(s):  
Sandra S. Pröckl ◽  
Wolfgang Kleist ◽  
Markus A. Gruber ◽  
Klaus Köhler
Keyword(s):  
Heck Reaction ◽  
Aryl Chlorides ◽  
Solid Catalysts ◽  
Highly Active ◽  
In Situ Generation

Facile in situ generation of highly active (arylimido)vanadium(v)–alkylidene catalysts for the ring-opening metathesis polymerization (ROMP) of cyclic olefins by immediate phenoxy ligand exchange

2018 ◽  
Vol 54 (96) ◽  
pp. 13559-13562 ◽  
Author(s):  
Hitomi Hayashibara ◽  
Xiaohua Hou ◽  
Kotohiro Nomura
Keyword(s):  
Ligand Exchange ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Cyclic Olefins ◽  
Highly Active ◽  
In Situ Generation

Remarkably active vanadium(v)–alkylidene catalysts for the ring-opening metathesis polymerization of cyclic olefins can be generated in situ upon addition of C6F5OH or C6Cl5OH.

Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15

2009 ◽  
Vol 371 (1-2) ◽  
pp. 85-91 ◽  
Author(s):  
Maria D. Gracia ◽  
Alina M. Balu ◽  
Juan M. Campelo ◽  
Rafael Luque ◽  
Jose M. Marinas ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Highly Active ◽  
In Situ Generation

In situ generation of highly active olefin metathesis initiators

2006 ◽  
Vol 691 (24-25) ◽  
pp. 5482-5486 ◽  
Author(s):  
Nele Ledoux ◽  
Bart Allaert ◽  
David Schaubroeck ◽  
Stijn Monsaert ◽  
Renata Drozdzak ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Highly Active ◽  
In Situ Generation

In Situ Generation of Palladium Nanoparticles: Reusable, Ligand-Free Heck Reaction in PEG-400 Assisted by Focused Microwave Irradiation

Synlett ◽  
2011 ◽  
Vol 2011 (03) ◽  
pp. 369-372 ◽  
Author(s):  
Zhengyin Du ◽  
Lin Bai ◽  
Wanwei Zhou ◽  
Fen Wang ◽  
Jin-Xian Wang
Keyword(s):  
Microwave Irradiation ◽  
Heck Reaction ◽  
Palladium Nanoparticles ◽  
Peg 400 ◽  
Ligand Free ◽  
In Situ Generation

Synthesis, Characterization and Catalytic Utilization of a Ferrocene Diamidodiphosphane

2007 ◽  
Vol 72 (4) ◽  
pp. 453-467 ◽  
Author(s):  
Petr Štěpnička ◽  
Jiří Schulz ◽  
Ivana Císařová ◽  
Karla Fejfarová
Keyword(s):  
Phenylboronic Acid ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Aryl Halides ◽  
Coupling Reactions ◽  
Aryl Chlorides ◽  
Highly Active ◽  
Aryl Bromides ◽  
Cross Coupling Reaction

Amidation of 1'-(diphenylphosphanyl)ferrocene-1-carboxylic acid (Hdpf) with ethane-1,2-diamine afforded N,N'-ethylenebis[1'-(diphenylphosphanyl)ferrocene-1-carboxamide] (1), which was isolated in free and solvated form, 1·2AcOH. Both 1 and Hdpf were further converted to their respective phosphane sulfides, 2·2AcOH and 3 that were structurally characterized. Testing of the amidophosphane ligands in Suzuki-Miyaura cross-coupling reaction between phenylboronic acid and various aryl halides revealed that catalyst formed in situ from 1 and palladium(II) acetate is highly active in coupling reactions of aryl bromides whilst the corresponding aryl chlorides showed no or only poor conversions. The catalyst based on 2·2AcOH gave markedly lower yields of the coupling products.

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