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Titolo:
Enantioselective catalysis in fluorinated media - Synthesis and propertiesof chiral perfluoroalkylated (salen)manganese complexes
Autore:
Pozzi, G; Cavazzini, M; Cinato, F; Montanari, F; Quici, S;
Indirizzi:
Univ Milan, CNR, Ctr Sintesi & Stereochim Speciali Sistemi Organ, I-20133 Milan, Italy Univ Milan Milan Italy I-20133 ciali Sistemi Organ, I-20133 Milan, Italy Univ Milan, Dipartimento Chim Organ & Ind, I-20133 Milan, Italy Univ Milan Milan Italy I-20133 to Chim Organ & Ind, I-20133 Milan, Italy
Titolo Testata:
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
fascicolo: 8, , anno: 1999,
pagine: 1947 - 1955
SICI:
1434-193X(199908):8<1947:ECIFM->2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUOROUS BIPHASIC CONDITIONS; UNFUNCTIONALIZED OLEFINS; ASYMMETRIC EPOXIDATION; MOLECULAR-OXYGEN; PERFLUORINATED SOLVENTS; AEROBIC EPOXIDATION; ALKENES; SEPARATION; DIOXYGEN; SYSTEMS;
Keywords:
biphasic catalysis; epoxidations; fluorinated compounds; manganese; salen ligands;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Pozzi, G Univ Milan, CNR, Ctr Sintesi & Stereochim Speciali Sistemi Organ,Via Golgi 19, I-20133 Milan, Italy Univ Milan Via Golgi 19 Milan Italy I-20133 I-20133 Milan, Italy
Citazione:
G. Pozzi et al., "Enantioselective catalysis in fluorinated media - Synthesis and propertiesof chiral perfluoroalkylated (salen)manganese complexes", EUR J ORG C, (8), 1999, pp. 1947-1955

Abstract

Chiral (salen)manganese complexes, which are selectively soluble in perfluorocarbons, were synthesized and tested as epoxidation catalysts in fluorous-organic two-phase systems. The immiscibility of the perfluorocarbons withregular organic solvents allowed a quick and effective separation of the catalyst from the products. These unprecedented perfluoroalkylated salen complexes were found to be efficient and chemoselective catalysts in the presence of several oxygen donors. but enantioselectivities were generally poor. An interesting exception to this behaviour was observed in the asymmetric epoxidation of indene that provides indene oxide with 70-92% enantiomeric excess.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 18:21:38