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Titolo:
Asymmetric epoxidation with a photoactivated [Ru(salen)] complex
Autore:
Nakata, K; Takeda, T; Mihara, J; Hamada, T; Irie, R; Katsuki, T;
Indirizzi:
Kyushu Univ 33, Fac Sci, Dept Chem, Grad Sch,Higashi Ku, Fukuoka 8128581, Japan Kyushu Univ 33 Fukuoka Japan 8128581 ,Higashi Ku, Fukuoka 8128581, Japan
Titolo Testata:
CHEMISTRY-A EUROPEAN JOURNAL
fascicolo: 17, volume: 7, anno: 2001,
pagine: 3776 - 3782
SICI:
0947-6539(20010903)7:17<3776:AEWAP[>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGHLY ENANTIOSELECTIVE EPOXIDATION; MN-SALEN CATALYST; ALKENE EPOXIDATION; UNFUNCTIONALIZED OLEFINS; CIS-OLEFINS; (SALEN)MANGANESE(III) COMPLEXES; TRANS-OLEFINS; SCHIFF-BASE; N-OXIDES; PORPHYRINS;
Keywords:
asymmetric catalysis; epoxidation; N,O ligands; photoactivation; ruthenium; salen;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Katsuki, T Kyushu Univ 33, Fac Sci, Dept Chem, Grad Sch,Higashi Ku, Fukuoka 8128581, Japan Kyushu Univ 33 Fukuoka Japan 8128581 , Fukuoka 8128581, Japan
Citazione:
K. Nakata et al., "Asymmetric epoxidation with a photoactivated [Ru(salen)] complex", CHEM-EUR J, 7(17), 2001, pp. 3776-3782

Abstract

(Nitrosyl)(salen)ruthenium(II) complex 1 was found to serve as an efficient catalyst for the epoxidation of conjugated olefins under photoirradiation, with 2,6-dichloropyridine N-oxide (2) or tetramethylpyrazine N,N'-dioxideas a stoichiometric oxidant. High enantioselectivity was achieved irrespective of the substitution pattern of olefins. The choice of solvent depends on stability of the resulting epoxides: high enantioselectivity is generally observed in the reaction with ethereal solvents, but use of benzene is recommended when the resulting epoxides are acid-sensitive.

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Documento generato il 04/12/20 alle ore 19:43:06