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Titolo:
Heterogeneous catalytic aziridination of styrene using transition-metal-exchanged zeolite Y
Autore:
Gullick, J; Taylor, S; Kerton, O; McMorn, P; King, F; Hancock, FE; Bethell, D; Page, PCB; 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 Synetix, Billingham TS23 1LB, Cleveland, England Synetix Billingham Cleveland England TS23 1LB S23 1LB, Cleveland, England Univ Liverpool, Dept Chem, Leverhulme Ctr Innovat Catalysis, Liverpool L693BX, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 3BX , Merseyside, England Univ Loughborough, Dept Chem, Loughborough LE11 3TU, Leics, England Univ Loughborough Loughborough Leics England LE11 3TU 3TU, Leics, England
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 3-4, volume: 75, anno: 2001,
pagine: 151 - 154
SICI:
1011-372X(2001)75:3-4<151:HCAOSU>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALKENES; MANGANESE; IODOSYLBENZENE; EPOXIDATION; OLEFINS; IRON;
Keywords:
aziridination; alkenes; asymmetric catalysis; bis(oxazoline)-modified zeolite Y;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
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:
J. Gullick et al., "Heterogeneous catalytic aziridination of styrene using transition-metal-exchanged zeolite Y", CATAL LETT, 75(3-4), 2001, pp. 151-154

Abstract

Transition-metal-exchanged zeolite Y (Cr, Mn, Fe, Co, Ni, Cu, Zn) are compared as catalysts for the aziridination of styrene using (N-(p-tolylsulfonyl)imino)phenyliodinane (PhI=NTs) as the nitrene precursor. The Cu-exchangedzeolite shows high levels of aziridine formation, but significant yields of aziridine are also obtained with the Cr-, Mn-, Fe- and Co-exchanged zeolite Y. In contrast, these cations produce much lower yields of aziridine in the corresponding homogeneously catalysed reactions. Addition of a chiral bis-oxazoline ligand leads to a significant decrease in the yield of aziridine for all the ion-exchanged zeolites, with the exception of the Cu-exchanged zeolite Y. Further experiments with (N-(p-nitrophenylsulfonyl)imino)phenyliodinane (PhI=NNs) as nitrene donor indicate that, in addition to Cu-exchanged zeolite Y, significant yields of the aziridine can be formed for Zn-,Mn, Fe- and Co-exchanged zeolite Y. The major by-product was benzaldehyde,probably formed by oxidation of styrene. These data confirm that Cu-exchanged zeolite Y is the best aziridination catalyst but it is shown that othermetal-exchanged zeolites are also catalytically active.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 02:49:11