Efficient transfer hydrogenation of carbonate salts from glycerol using water-soluble iridium N-heterocyclic carbene catalysts

Green Chemistry, Journal Year: 2020, Volume and Issue: 22(18), P. 6093 - 6104

Published: Jan. 1, 2020

Thermally-robust and water-soluble Ir(i) Ir(iii) N-heterocyclic carbene complexes with sulfonate functionalized wingtips are prolific catalysts for carbonate transfer hydrogenation from glycerol without additives in aqueous media.

Language: Английский

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Cp*Ir complex bearing a flexible bridging and functional 2,2′-methylenebibenzimidazole ligand as an auto-tandem catalyst for the synthesis of N-methyl tertiary amines from imines via transfer hydrogenation/N-methylation with methanol

Journal of Catalysis, Journal Year: 2021, Volume and Issue: 402, P. 325 - 334

Published: Aug. 26, 2021

Language: Английский

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Transition‐Metal‐Catalysed Transfer Hydrogenation Reactions with Glycerol and Carbohydrates as Hydrogen Donors

European Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 27(12)

Published: Jan. 19, 2024

Abstract Catalytic transfer hydrogenation is a practical approach for reduction of various unsaturated compounds and an alternative to pressurised traditional metal hydride reagents. Among the hydrogen donors, biomass such as glycerol carbohydrates received considerable attention reactions due their non‐toxic, eco‐friendly renewable nature. The present review addresses development homogeneous heterogeneous catalysts carbonyl compounds, alkenes, alkynes, nitro CO 2 etc. using potential donors.

Language: Английский

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An N-heterocyclic carbene iridium catalyst with metal-centered chirality for enantioselective transfer hydrogenation of imines

Chemical Communications, Journal Year: 2017, Volume and Issue: 53(57), P. 8089 - 8092

Published: Jan. 1, 2017

A cyclometalating N-heterocyclic carbene iridium complex featuring metal-centered chirality has been developed for the highly enantioselective transfer hydrogenation of imines.

Language: Английский

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Transfer hydrogenation of carbon dioxide and bicarbonate from glycerol under aqueous conditions

Chemical Communications, Journal Year: 2018, Volume and Issue: 54(48), P. 6184 - 6187

Published: Jan. 1, 2018

Catalytic transfer hydrogenation of CO₂ from glycerol to afford formic and lactic acid is an attractive path valorizing two waste streams. The process significantly more thermodynamically favorable than direct hydrogenation.

Language: Английский

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Applying Le Chatelier's Principle for a Highly Efficient Catalytic Transfer Hydrogenation with Ethanol as the Hydrogen Source

ChemCatChem, Journal Year: 2018, Volume and Issue: 10(21), P. 4844 - 4848

Published: Sept. 10, 2018

Abstract While isopropanol or formic acid derivatives are mainly applied as hydrogen sources in catalytic transfer hydrogenation reactions, there only a few reports on the use of primary alcohols. In present communication we report that ecologically benign and cheap ethanol can be with ruthenium(II) is completely stable against moisture oxygen. Catalytic an equilibrium reaction. Therefore, rapid removal acetic aldehyde being formed product oxidation key for high conversions. The reaction shows broad substrate scope allows ketones, aldehydes imines.

Language: Английский

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Heteroditopic Ru(II)– and Ir(III)–NHC Complexes with Pendant 1,2,3-Triazole/Triazolylidene Groups: Stereoelectronic Impact on Transfer Hydrogenation of Unsaturated Compounds

Organometallics, Journal Year: 2019, Volume and Issue: 38(13), P. 2610 - 2623

Published: June 26, 2019

Imidazol-2-ylidene (ImNHC) and 1,2,3-traizol-5-ylidene (tzNHC) have been established as important classes of carbene ligands in homogeneous catalysis. To develop Ru(II)/Ir(III) complexes based on these ligand systems considering their electronic well steric profiles for hydride transfer reactions, we employed chelating featuring combinations ImNHC triazole-N or mesoionic tzNHC donors bridged by a CH2 spacer with possible modifications at triazole backbone. In general, synthesized Ru(II) were found to perform significantly better than analogous Ir(III) ketone aldimine reduction. Among the complexes, electron-rich 8/9 general formula [(p-cymene)(ImNHC–CH2–tzNHC)RuII(Cl)]BF4 two different (ImNHC tzNHC) appreciably reduction combination triazole-N-donor ([(p-cymene)(ImNHC–CH2–tz–N)RuII(Cl)]BF4; 4) explaining fine-tuning catalytic systems. No appreciable variation activity was observed between 8 9 having almost similar profiles. However, less bulky complex N-phenyl substituent is more suitable 8, N-3,5-dimethylphenyl that explains influence addition effect process.

Language: Английский

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Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C₃ chemicals: current and future trends

Sustainable Energy & Fuels, Journal Year: 2021, Volume and Issue: 6(3), P. 596 - 639

Published: Nov. 19, 2021

The search for sustainable routes the production of C 3 chemicals by using renewable feedstocks has attracted significant interest from academic and industrial communities to alleviate shortage fossil fuels.

Language: Английский

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Biomimetic Control over Bimetallic Nanoparticle Structure and Activity via Peptide Capping Ligand Sequence

ACS Nano, Journal Year: 2024, Volume and Issue: 18(4), P. 3286 - 3294

Published: Jan. 16, 2024

The controlled design of bimetallic nanoparticles (BNPs) is a key goal in tailoring their catalytic properties. Recently, biomimetic pathways demonstrated potent control over the distribution different metals within BNPs, but direct understanding peptide effect on compositional at interparticle and intraparticle levels remains lacking. We synthesized two sets PtAu systems with peptides correlated structure, composition, distributions activity. Structural analyses were performed by combined machine learning-assisted refinement X-ray absorption spectra Z-contrast measurements scanning transmission electron microscopy. difference activities between was attributed to details Pt Au across these markedly heterogeneous systems, comprising Pt-rich, Au-rich, core/Pt shell nanoparticles. total amount shells BNPs proposed be activity descriptor. This approach can extended other facilitate targeted catalysts desired

Language: Английский

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The cooperative effect of Lewis and Brønsted acid sites on Sn-MCM-41 catalysts for the conversion of 1,3-dihydroxyacetone to ethyl lactate

Green Chemistry, Journal Year: 2019, Volume and Issue: 21(12), P. 3383 - 3393

Published: Jan. 1, 2019

Lactic acid and alkyl lactates are widely applied in the production of food, cosmetics, pharmaceuticals, organic synthesis biodegradable polymers.

Language: Английский

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