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Titolo:
Highly enantioselective cyclopropanation in alcoholic and aqueous solventscatalyzed by optically active beta-ketoiminato cobalt(II) complex
Autore:
Ikeno, T; Nishizuka, A; Sato, M; Yamada, T;
Indirizzi:
Keio Univ, Fac Sci & Technol, Dept Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan Keio Univ Yokohama Kanagawa Japan 2238522 kohama, Kanagawa 2238522, Japan
Titolo Testata:
SYNLETT
fascicolo: 3, , anno: 2001,
pagine: 406 - 408
SICI:
0936-5214(200103):3<406:HECIAA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASYMMETRIC CYCLOPROPANATION; DIAZO-COMPOUNDS; OLEFINS; DIAZOACETATES; ACID; STYRENES; WATER;
Keywords:
asymmetric synthesis; cyclopropanation; water; alcohols; cobalt;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Yamada, T Keio Univ, Fac Sci & Technol, Dept Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan Keio Univ Yokohama Kanagawa Japan 2238522 nagawa 2238522, Japan
Citazione:
T. Ikeno et al., "Highly enantioselective cyclopropanation in alcoholic and aqueous solventscatalyzed by optically active beta-ketoiminato cobalt(II) complex", SYNLETT, (3), 2001, pp. 406-408

Abstract

The highly enantioselective cyclopropanation of styrenes and diazoacetatesproceeded in alcohol or aqueous alcohol in the presence of the beta -ketoiminato cobalt(II) complex. Water and alcohols accelerated the reaction and improved the diastereo- and enantioselectivities. In these media, the alpha,alpha -disubstituted styrenes were smoothly cyclopropanated with high enantiomeric excess.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 07:10:13