Catalysis Conversion of Carbon Dioxide and Epoxides by Tetrahydroxydiboron To Prepare Cyclic Carbonates

The Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 88(22), P. 15717 - 15725

Published: Oct. 27, 2023

A binary catalytic system comprising tetrahydroxydiboron and tetrabutylammonium iodide (TBAI) was used to catalyze the cycloaddition of carbon dioxide (CO2) with epoxides. The catalyst (9 mol %), in combination use TBAI (13.5 %) as a nucleophile, is capable catalyzing CO2 various terminal epoxides under room temperature balloon. In addition, range internal epoxides, including sterically hindered bicyclic vegetable oil-based were suitable for system, affording series cyclic carbonates moderate high yields. tetrahydroxydiboron/TBAI cooperative mechanism elucidated using Fourier transform infrared spectroscopy, nuclear magnetic resonance, electrospray ionization-high-resolution mass spectrometry. Results reveal that exhibits dual effects, activating both epoxides; initially, it underwent insertion form boron–CO2 adduct subsequently activated through interaction B–O bond.

Language: Английский

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A review of β-cyclodextrin-based catalysts system in the chemical fixation of carbon dioxide

Journal of CO2 Utilization, Journal Year: 2024, Volume and Issue: 91, P. 103011 - 103011

Published: Dec. 28, 2024

Language: Английский

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Synergistic catalysis of dual-sites promoted cycloaddition of CO2 with epoxides

Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133305 - 133305

Published: Sept. 30, 2024

Language: Английский

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Research progress in catalytic conversion of CO2 and epoxides based on ionic liquids to cyclic carbonates

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110596 - 110596

Published: Dec. 1, 2024

Language: Английский

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Dft Study on the Mechanism and Structural Aspects of Iron(Ii)-Catalyzed Condensation of Epichlorohydrin and Co2

Published: Jan. 1, 2024

Language: Английский

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Date July 10, 2024

European Journal of Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: July 12, 2024

Abstract Tetradentate ONNO donor ligands H 2 hz(fp) ( I ), hz(butp) II ) and hz(bp) III synthesized by the reaction of hydrazine hydrate with 4‐formyl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (fp), 4‐butyryl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (butp) 4‐benzoyl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (bp), respectively, react [Mo VI O (acac) ] in 1 : molar ratio refluxing methanol to give binuclear complexes [(μ‐O){Mo (H O)} 3 ). All are characterized several techniques that include, FT‐IR, UV/Vis, NMR, 13 C NMR spectroscopy, elemental thermal analysis, single crystal X‐ray analysis . Ligands coordinate through a set ON functionalities same ligand two Mo groups attached an oxido‐bridge. Additional coordination water each vanadium makes them maintain octahedral geometry. Azine moiety coordinates molybdenum symmetrical μ‐{η ‐(N−N)} fashion. Catalytic activity these was studied for cycloaddition CO epoxides. A pressure 4 bar , 3.0 mg catalyst, mmol tetrabutylammonium bromide (TBAB) at 120 °C 6 h were found be most suited condition 10 epoxide. Under optimized conditions, product yield selectivity alkene carbonate all investigated. As high as 96 % almost 99 styrene under conditions achieved.

Language: Английский

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Iron and Zinc Metallates Supported on Ion Exchange Resins: Synergistic Catalysts for the Solvent‐free Cyclic Carbonate Synthesis from Epoxides and CO2

European Journal of Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract Despite extensive research into developing efficient and environmentally friendly catalysts for converting CO 2 over the last decade, search a robust cost‐effective catalytic system is ongoing. This study describes applying new using inexpensive ferrate zincate anions immobilized on easily available commercial ion exchange resins (IER) to produce cyclic carbonates from with high efficiency low cost. Two polystyrene‐based anion resins, Amberlyst TM A26‐Cl ( ) Amberlite IRA‐400‐Cl IRA400‐Cl ), were compared. The results demonstrated catalysts’ remarkable activity under mild conditions synergistic effect between polystyrene support active ammonium metallates, presenting scalable, eco‐friendly method carbonate production waste . A Design of Experiment (DoE) approach was implemented optimize cycloaddition reaction scale‐up 5 g batch propylene oxide conducting recycling tests that catalyst retained its four cycles. also explored use various epoxides found terminal produced very good yields. In summary, this introduces cost‐effective, scalable valuable carbonates, leveraging effects supports metallates.

Language: Английский

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DFT study on the mechanism and structural aspects of iron(II)-catalyzed condensation of epichlorohydrin and CO2

Journal of Organometallic Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 123446 - 123446

Published: Nov. 1, 2024

Language: Английский

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N-Heterocyclic Carbene-Pyridine Molybdenum Complex Supported over SBA-15 for Converting of Carbon Dioxide into Cyclic Carbonates

Chinese Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 44(10), P. 3213 - 3213

Published: Jan. 1, 2024

Language: Английский

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EPOXIDATION OF 1-OCTENE BY TERT-BUTYL HYDROPEROXIDE IN THE PRESENCE OF TITANIUM COMPOUNDS

Chemistry Technology and Application of Substances, Journal Year: 2023, Volume and Issue: 6(2), P. 9 - 15

Published: Dec. 1, 2023

The epoxidation reaction of 1-octene by tert-butyl hydroperoxide in the presence TiB2, TiC and TiSi2 was investigated. It is shown that titanium compounds catalyzed exhibited different activity. established best choice for theepoxidation which provided 73 % conversion 75 selectivity epoxide formation. performance after three runs indicated it’s excellent reusability.

Language: Английский

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