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Titolo:
Polymer-bound bis(oxazoline) as a chiral catalyst
Autore:
Hallman, K; Moberg, C;
Indirizzi:
Royal Inst Technol, Dept Chem Organ Chem, SE-10044 Stockholm, Sweden RoyalInst Technol Stockholm Sweden SE-10044 SE-10044 Stockholm, Sweden
Titolo Testata:
TETRAHEDRON-ASYMMETRY
fascicolo: 10, volume: 12, anno: 2001,
pagine: 1475 - 1478
SICI:
0957-4166(20010622)12:10<1475:PBAACC>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIELS-ALDER REACTION; ENANTIOSELECTIVE CYCLOPROPANATION REACTIONS; SOLID-PHASE SYNTHESIS; HETEROGENEOUS CATALYSTS; ASYMMETRIC CATALYSIS; COPPER(II) COMPLEXES; NITROGEN LIGANDS; ENOL ETHERS; ALDOL; ALKYLATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Moberg, C Royal Inst Technol, Dept Chem Organ Chem, SE-10044 Stockholm, Sweden Royal Inst Technol Stockholm Sweden SE-10044 Stockholm, Sweden
Citazione:
K. Hallman e C. Moberg, "Polymer-bound bis(oxazoline) as a chiral catalyst", TETRAHEDR-A, 12(10), 2001, pp. 1475-1478

Abstract

A chiral bis(oxazoline) was grafted on ArgoGel and used in the palladium-catalysed substitution of (+/-)-1,3-diphenyl-2-propenyl acetate with dimethyl malonate. The enantioselectivity was the same as that observed when the analogous monomeric catalyst was used (94-95% e.e.), despite the fact that the C-2 symmetry of the ligand was affected when coupled to the polymer. Thepolymer-supported catalyst could be recycled several times after removal of precipitated Pd(0). The polymer-bound bis(oxazoline) was also applied in a zinc-catalysed Diels-Alder reaction but lower selectivity and reactivity than the monomer was observed. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 12:30:49