Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Antioquia
2018
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| _version_ | 1876445502453579776 |
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| author | Brayan David Verdugo-Torres |
| author_facet | Brayan David Verdugo-Torres |
| contents | Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst Brayan David Verdugo-Torres Jairo Antonio Cubillos-Lobo Hugo Alfonso Rojas-Sarmiento Ingeniería Styrene Dimeric catalyst Dimethyldioxirane catalysts reusability Enantioselective epoxidation The enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane (DMD) and dimeric homochiral Mn(III)-Schiff base catalyst 1 has been explored. The parameters evaluated were olefin/oxidant molar ration, catalyst loading, reaction temperature and presence of nitrogen coordinating co-catalysts. Conversions of more than 99% and enantiomeric excess 66% were obtained. The selectivity is complete towards styrene oxide using 2 mol% catalyst loading, 1.36 mmol KHSO5 in 8 ml of water, absence of co-catalyst and 17 °C as reaction temperature. Furthermore, the catalyst could be recycled up to three times with slightly decrease of catalytic activity due mainly to the physical loss of the catalyst during the recovery step and at a lesser extent as a consequence of its oxidative degradation. 2018 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43060744010 https://www.redalyc.org/journal/430/43060744010/ https://www.redalyc.org/journal/430/43060744010/html/ https://www.redalyc.org/journal/430/43060744010/43060744010.epub https://www.redalyc.org/journal/430/43060744010/movil 10.17533/udea.redin.n89a10 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.89 |
| format | Artículo científico |
| id | redalyc_43060744010 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Universidad de Antioquia |
| spellingShingle | Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst Brayan David Verdugo-Torres Ingeniería Styrene Dimeric catalyst Dimethyldioxirane catalysts reusability Enantioselective epoxidation Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst Brayan David Verdugo-Torres Jairo Antonio Cubillos-Lobo Hugo Alfonso Rojas-Sarmiento Ingeniería Styrene Dimeric catalyst Dimethyldioxirane catalysts reusability Enantioselective epoxidation The enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane (DMD) and dimeric homochiral Mn(III)-Schiff base catalyst 1 has been explored. The parameters evaluated were olefin/oxidant molar ration, catalyst loading, reaction temperature and presence of nitrogen coordinating co-catalysts. Conversions of more than 99% and enantiomeric excess 66% were obtained. The selectivity is complete towards styrene oxide using 2 mol% catalyst loading, 1.36 mmol KHSO5 in 8 ml of water, absence of co-catalyst and 17 °C as reaction temperature. Furthermore, the catalyst could be recycled up to three times with slightly decrease of catalytic activity due mainly to the physical loss of the catalyst during the recovery step and at a lesser extent as a consequence of its oxidative degradation. 2018 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43060744010 https://www.redalyc.org/journal/430/43060744010/ https://www.redalyc.org/journal/430/43060744010/html/ https://www.redalyc.org/journal/430/43060744010/43060744010.epub https://www.redalyc.org/journal/430/43060744010/movil 10.17533/udea.redin.n89a10 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.89 |
| title | Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst |
| topic | Ingeniería Styrene Dimeric catalyst Dimethyldioxirane catalysts reusability Enantioselective epoxidation |
| url | https://www.redalyc.org/articulo.oa?id=43060744010 https://www.redalyc.org/journal/430/43060744010/ https://www.redalyc.org/journal/430/43060744010/html/ https://www.redalyc.org/journal/430/43060744010/43060744010.epub https://www.redalyc.org/journal/430/43060744010/movil |