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Titolo:
STUDIES ON STEROIDAL PLANT-GROWTH REGULATORS .29. OSMIUM TETROXIDE-CATALYZED ASYMMETRIC DIHYDROXYLATION OF THE (22E,24R)-24-ALKYL AND THE (22E,24S)-24-ALKYL STEROIDAL UNSATURATED SIDE-CHAIN
Autore:
HUANG LF; ZHOU WS; SUN LQ; PAN XF;
Indirizzi:
CHINESE ACAD SCI,SHANGHAI INST ORGAN CHEM,345 LINGLING LU SHANGHAI 200032 PEOPLES R CHINA CHINESE ACAD SCI,SHANGHAI INST ORGAN CHEM,345 LINGLING LU SHANGHAI 200032 PEOPLES R CHINA LANZHOU UNIV,DEPT CHEM LANZHOU 730000 PEOPLES R CHINA
Titolo Testata:
Journal of the Chemical Society. Perkin transactions. I
fascicolo: 14, , anno: 1993,
pagine: 1683 - 1686
SICI:
0300-922X(1993):14<1683:SOSPR.>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROMOTING STEROIDS; STEREOSELECTIVE CONSTRUCTION; BRASSINO STEROIDS; OLEFINS; (22R,23R)-28-HOMOBRASSINOLIDE; ANALOGS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
L.F. Huang et al., "STUDIES ON STEROIDAL PLANT-GROWTH REGULATORS .29. OSMIUM TETROXIDE-CATALYZED ASYMMETRIC DIHYDROXYLATION OF THE (22E,24R)-24-ALKYL AND THE (22E,24S)-24-ALKYL STEROIDAL UNSATURATED SIDE-CHAIN", Journal of the Chemical Society. Perkin transactions. I, (14), 1993, pp. 1683-1686

Abstract

The osmium tetroxide-catalysed asymmetry dihydroxylation of the (22E,24R)- and (22E,24S)-24-methyl steroidal unsaturated side chain with dihydroquinidine p-chlorobenzoate (DHQD) as chiral ligand gave an 8:1 ratio of (22R,23R)- and (22S,23S)-22,23-dihydroxylated products; with a 24-ethyl substituent only a 1.5:1 ratio of (22R,23R)- and (22S, 23S)- products was obtained. With the chiral ligand 9-O-(9'-phenanthryl) dihydroquinidine (DHQD-PHN), a 8:1 ratio of (22R,23R)- and (22S,23S)- products was obtained from the (22E,24S)-24-ethyl substituted side chain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 06:37:04