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Titolo:
ENANTIOSELECTIVE SYNTHESIS OF ALPHA-HYDROXY PHOSPHONATES USING THE LALI(3)TRIS(BINAPHTHOXIDE) CATALYST (LLB), PREPARED BY AN IMPROVED METHOD
Autore:
SASAI H; BOUGAUCHI M; ARAI T; SHIBASAKI M;
Indirizzi:
UNIV TOKYO,FAC PHARMACEUT SCI,BUNKYO KU TOKYO 113 JAPAN UNIV TOKYO,FAC PHARMACEUT SCI,BUNKYO KU TOKYO 113 JAPAN
Titolo Testata:
Tetrahedron letters
fascicolo: 15, volume: 38, anno: 1997,
pagine: 2717 - 2720
SICI:
0040-4039(1997)38:15<2717:ESOAPU>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASYMMETRIC NITROALDOL REACTION; LANTHANUM BINAPHTHOL COMPLEX; BINOL COMPLEXES; AMINOPHOSPHONIC ACIDS; ANTIBACTERIAL AGENTS; EFFICIENT SYNTHESIS; AROMATIC-ALDEHYDES; INHIBITORS; HYDROXYPHOSPHONATES; PHOSPHONOPEPTIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
H. Sasai et al., "ENANTIOSELECTIVE SYNTHESIS OF ALPHA-HYDROXY PHOSPHONATES USING THE LALI(3)TRIS(BINAPHTHOXIDE) CATALYST (LLB), PREPARED BY AN IMPROVED METHOD", Tetrahedron letters, 38(15), 1997, pp. 2717-2720

Abstract

LaLi(3)tris(binaphthoxide) catalyst (LLB), which is prepared from LaCl3 . 7H(2)O(1 mol equiv), (R)- or (S)-BINOL dilithium salt (2.7 mol equiv), and NaO-t-Bu (0.3 mol equiv), is effective for the hydrophosphonylation of various aldehydes to give desired alpha-hydroxyphosphonatesin up to 95% ee (88% yield). It is also noteworthy that with slow addition of the aldehydes the enantiomeric excesses of the products were increased. (C) 1997 Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:47:18