Homogeneous Catalysis ‐<i>Quo vadis</i>?

Herrmann, Wolfgang A.; Cornils, B.

doi:10.1002/9783527618231.ch4

Cited by 4 publications

(3 citation statements)

References 206 publications

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“…The first generation of cobalt catalysts 4,5 used on an industrial scale showed modest activity under harsh operating conditions 6 and required high-purity feedstocks. 7 Later, Wilkinson developed different phosphine-modified rhodium catalysts 8,9 that improved the chemoselectivity and regioselectivity of the reaction while operating at much lower pressures than the cobalt counterpart, improving the economy of the process.…”

Section: ■ Introductionmentioning

confidence: 99%

Active and Regioselective Ru Single-Site Heterogeneous Catalysts for Alpha-Olefin Hydroformylation

et al. 2022

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A heterogeneous ruthenium catalyst consisting of isolated single atoms and disordered clusters stabilized in a N-doped carbon matrix has been synthesized with very good activity and remarkable regioselectivity in the hydroformylation of 1-hexene. The role of the nitrogen heteroatoms has been probed essential to increase the catalyst stability and activity, enabling the stabilization of Ru(II)–N sites according to X-ray photoelectron spectroscopy (XPS) and XANES. Intrinsic size-dependent activity of Ru species of different atomicity has been extracted, correlating the observed reaction rate and the particle size distribution determined by means of aberration-corrected high-angle annular dark-field scanning transmission electron microscopy, permitting the identification of single-atom sites as the most active ones. This catalyst appears as a promising alternative with respect to its heterogeneous counterparts, paving the way for designing improved Ru heterogeneous catalysts.

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Section: ■ Introductionmentioning

confidence: 99%

Active and Regioselective Ru Single-Site Heterogeneous Catalysts for Alpha-Olefin Hydroformylation

et al. 2022

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“…[ 110,111 ] The low reactivity of chlorides is usually attributed to the strength of the C‐Cl bond (bond dissociation energies for Ph‐X: Cl: 96 kcal/mol; Br: 81 kcal/mol; I: 65 kcal/mol), which leads to a reluctance by aryl chlorides to oxidatively add to Pd 0 centers, a critical initial step in palladium‐catalyzed coupling reactions. [ 112 ]…”

Section: Resultsmentioning

confidence: 99%

Applications of quinoxaline‐bridged bis(benzimidazolium) salts as ligand sources for the palladium‐catalyzed Suzuki and Heck cross‐coupling reactions in an aqueous medium

Düşünceli

Şahan

Kaloğlu

et al. 2022

J Chinese Chemical Soc

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In the present work, quinoxaline-bridged bis(benzimidazolium) salts were prepared by the reaction of 2,3-bis(bromomethyl) quinoxaline and 1-substituted benzimidazole. The structures of the bis(benzimidazolium) salts were characterized by NMR, FT-IR, and elemental analysis techniques. Also, the photophysical properties of salts were investigated by UV-Vis absorption and fluorescence emission spectroscopy. Next, these quinoxaline bridged bis(benzimidazolium) salts were used as bidentate benzimidazol-2-ylidene ligand precursors in the palladium-catalyzed Suzuki-Miyaura and Mizoroki-Heck cross-couplings. These salts exhibited moderate-to-high activity in the palladium-catalyzed cross-coupling reactions.

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“…During the last two decades, environmental aspects including catalysts and solvent recycling became an issue. Therefore, supported [25][26][27][28][29][30][31][32], water soluble [33] or biphasic systems [34][35][36], as realized in the Rhone-Poulenc process, have been developed [37][38][39][40]. Alternatively, the use of ionic liquids [41][42][43][44][45] or supercritical CO 2 has been reported [46].…”

Section: Hydroformylation Reactionsmentioning

confidence: 99%

N-Acetyl-N,N-dipyrid-2-yl (cyclooctadiene) rhodium (I) and iridium (I) complexes: Synthesis, X-ray structures, their use in hydroformylation and carbonyl hydrosilylation reactions and in the polymerization of diazocompounds

Bantu

Wurst

Buchmeiser

2007

Journal of Organometallic Chemistry

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Homogeneous Catalysis ‐Quo vadis?

Cited by 4 publications

References 206 publications

Active and Regioselective Ru Single-Site Heterogeneous Catalysts for Alpha-Olefin Hydroformylation

Active and Regioselective Ru Single-Site Heterogeneous Catalysts for Alpha-Olefin Hydroformylation

Applications of quinoxaline‐bridged bis(benzimidazolium) salts as ligand sources for the palladium‐catalyzed Suzuki and Heck cross‐coupling reactions in an aqueous medium

N-Acetyl-N,N-dipyrid-2-yl (cyclooctadiene) rhodium (I) and iridium (I) complexes: Synthesis, X-ray structures, their use in hydroformylation and carbonyl hydrosilylation reactions and in the polymerization of diazocompounds

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