Résumé
The one-pot epoxidation of alkenes with O2 is performed with nano-particulated Au/CeO2 and Ti-MCM-41 silylated materials in the presence of a hydrocarbon and azobis-iso-butyronitrile (AIBN) as a promoter. This initiator is able to form organo-gold species that promote the formation of hydrocarbon (3-methyl-pentane, ethylbenzene, or cumene) hydroperoxides which in the presence of Ti-mesoporous material epoxidize the alkene in good yields. The epoxidation reaction of 1-octene with molecular oxygen (PO2 = 12 bars) at 90 °C over AIBN-Au/CeO2 + Ti-MCM-41-silylated catalytic system results in alkene conversions close to 9% (≈40% of the maximum conversion attainable) with epoxide selectivity around 90% when working with cumene as a sacrificial hydrocarbon.
langue originale | Anglais |
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Pages (de - à) | 44-53 |
Nombre de pages | 10 |
journal | Journal of Catalysis |
Volume | 264 |
Numéro de publication | 1 |
Les DOIs | |
Etat de la publication | Publié - 15 mai 2009 |