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Titolo:
Catalytic asymmetric epoxidation of stilbene using a chiral salen complex immobilized in Mn-exchanged Al-MCM-41
Autore:
Piaggio, P; Langham, C; McMorn, P; Bethell, D; Bulman-Page, PC; Hancock, FE; Sly, C; Hutchings, GJ;
Indirizzi:
Cardiff Univ, Dept Chem, Cardiff CF10 3TB, S Glam, Wales Cardiff Univ Cardiff S Glam Wales CF10 3TB ardiff CF10 3TB, S Glam, Wales Univ Liverpool, Dept Chem, Liverpool L69 3BX, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 3BX , Merseyside, England Loughborough Univ Technol, Dept Chem, Loughborough LE11 3TU, Leics, England Loughborough Univ Technol Loughborough Leics England LE11 3TU cs, England Synetix, R&T Div, Billingham TS23 1LB, Teeside, England Synetix Billingham Teeside England TS23 1LB am TS23 1LB, Teeside, England Robinson Bro Ltd, W Bromwich B70 0AH, W Midlands, England Robinson Bro Ltd W Bromwich W Midlands England B70 0AH Midlands, England
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2
fascicolo: 1, , anno: 2000,
pagine: 143 - 148
SICI:
0300-9580(200001):1<143:CAEOSU>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENANTIOSELECTIVE EPOXIDATION; UNFUNCTIONALIZED OLEFINS; HYDROGENATION; OXIDATIONS; DESIGN; MCM-41;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Hutchings, GJ Cardiff Univ, Dept Chem, POB 912, Cardiff CF10 3TB, S Glam, Wales Cardiff Univ POB 912 Cardiff S Glam Wales CF10 3TB am, Wales
Citazione:
P. Piaggio et al., "Catalytic asymmetric epoxidation of stilbene using a chiral salen complex immobilized in Mn-exchanged Al-MCM-41", J CHEM S P2, (1), 2000, pp. 143-148

Abstract

Manganese-exchanged Al-MCM-41 modified by the chiral salen ligand [(R,R)-(-)-N,N'-bis(3,5-di-tert-butylsalicylidene)cyclohexane-1,2-diamine] can be used as an enantioselective heterogeneous epoxidation catalyst using iodosylbenzene as oxygen donor. Epoxidation of (Z)- and (E)-stilbene is studied in detail and experiments are described that demonstrate that the reaction is wholly catalysed heterogeneously. Similar enantioselectivity is observed for the oxidation of (Z)-stilbene to the (E)-epoxide using homogeneous (77.5% ee) or heterogeneous (70% ee) catalysts. The effect of temperature, solvents and donor ligands on the yield and enantioselection are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 12:58:16