Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/155840
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | New bis(oxazoline)–vanadyl complexes, supported by electrostatic interaction in Laponite clay, as heterogeneous catalysts for asymmetric oxidation of methyl phenyl sulfide |
Autor: | Zid, T. Ben; Fadhli, Marwa; Khedher, Ilyes; Fraile, José M. CSIC ORCID | Palabras clave: | Laponite Catalyst Asymmetry Bis(oxazolines) Oxidation Vanadium |
Fecha de publicación: | 2017 | Editor: | Elsevier | Citación: | Microporous and Mesoporous Materials 239: 167-172 (2017) | Resumen: | Chiral bis(oxazoline) ligands are used for the first time to promote the enantioselective vanadium-catalyzed oxidation of sulfides with alkyl hydroperoxides. Several bis(oxazoline)-VO complexes have been prepared and supported by cation exchange in Laponite clay. The substituent in the oxazoline ring, and the type of hydroperoxide are relevant parameters that control the activity and selectivity of the resulting catalysts. Tert-butyl hydroperoxide is more reactive but less enantioselective than cumenehydroperoxide, both with the neat and supported VO-bis(oxazoline) complexes. Activities and enantioselectivities obtained with the heterogeneous catalysts are always lower than in solution, and in general better and more consistent results are obtained with box(Pr) ligand which seems to be also the best chiral auxiliary in homogeneous phase, leading to a modest but significant enantioselectivity of 20% ee in heterogeneous phase and of 28% in homogeneous phase. The recovered of the best catalyst shows a decrease in the catalytic activity and in the enantioselectivity, in agreement with some decomplexation of the chiral ligand, whereas the supported vanadium species remain stable and recoverable. | URI: | http://hdl.handle.net/10261/155840 | DOI: | 10.1016/j.micromeso.2016.09.055 | Identificadores: | doi: 10.1016/j.micromeso.2016.09.055 issn: 1387-1811 |
Aparece en las colecciones: | (ISQCH) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
12
checked on 20-may-2024
WEB OF SCIENCETM
Citations
12
checked on 21-feb-2024
Page view(s)
253
checked on 21-may-2024
Download(s)
85
checked on 21-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.