Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO2
| Autor: | Fritz E. Kühn, Yuanhui Li, Robert M. Reich, Boping Liu, Bruno Dominelli |
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| Rok vydání: | 2019 |
| Předmět: |
Chemical substance
010405 organic chemistry Process Chemistry and Technology chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Catalysis Cycloaddition 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Magazine law Carbon dioxide Propylene carbonate Polymer chemistry Science technology and society Carbon |
| Zdroj: | Catalysis Communications. 124:118-122 |
| ISSN: | 1566-7367 |
| Popis: | Six novel bridge-functionalized bisimidazolium bromides have been synthesized for the catalytic cycloaddition of CO2 (70 °C, 0.4 MPa CO2). Additionally, the influence of the hydrogen-bond donors, the N-wing-tip-substituents and the chain length of the connecting carbon bridges on the catalytic activity were studied. A COOH-functionalized catalyst with mesityl N-substituents and a C3‑carbon bridge 6 ( Scheme 1 ) proves to be slightly more active than the reference catalyst 9ref for the addition of carbon dioxide to various epoxides, and can be analogously recycled from propylene carbonate (PC) for at least six times without distinct loss of activity. |
| Databáze: | OpenAIRE |
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