Efficient hydroalkoxylation of alkenes to generate octane-boosting ethers using recyclable metal triflates and highly active metal triflate/Brønsted acid-assisted catalysts
| Autor: | Mike S. Sibiya, D. Bradley G. Williams, Pieter S. van Heerden |
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| Rok vydání: | 2012 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Alkene General Chemical Engineering Energy Engineering and Power Technology Catalysis Fuel Technology chemistry Lanthanide trifluoromethanesulfonates Organic chemistry Lewis acids and bases Chemoselectivity Brønsted–Lowry acid–base theory Trifluoromethanesulfonate Hydroalkoxylation |
| Zdroj: | Fuel Processing Technology. 94:75-79 |
| ISSN: | 0378-3820 |
| DOI: | 10.1016/j.fuproc.2011.10.024 |
| Popis: | gem -Disubstituted alkenes are directly and readily etherified with alcohols using Al(OTf) 3 and Zr(OTf) 4 as recyclable Lewis acid catalysts. In contrast, primary or secondary alkene analogues were inert under these conditions, enabling excellent chemoselectivity. Lanthanide triflates are inactive as catalysts for such reactions, as is phosphoric acid. But a combination of these two otherwise inactive entities led to an ‘assisted acidity’ scenario that saw significant unmatched catalyst activity. All catalysts of this study are recyclable a number of times without loss of activity. |
| Databáze: | OpenAIRE |
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