Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Diastereotopy in some 3,4-dihydroisocoumarins - effect of changing the substituents on the chiral centre
Autore:
Ansari, MS; Rama, NH; Hussain, MT; Raza, AR;
Indirizzi:
Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan Quaid I Azam UnivIslamabad Pakistan 45320 em, Islamabad 45320, Pakistan
Titolo Testata:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
fascicolo: 7, volume: 56, anno: 2000,
pagine: 1385 - 1389
SICI:
1386-1425(200006)56:7<1385:DIS3-E>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
ISOCOUMARINS; CONVERSION; MODEL;
Keywords:
diastereotopy; 3,4-dihydroisocoumarins; nuclear magnetic resonance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Rama, NH Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan Quaid I Azam Univ Islamabad Pakistan 45320 abad 45320, Pakistan
Citazione:
M.S. Ansari et al., "Diastereotopy in some 3,4-dihydroisocoumarins - effect of changing the substituents on the chiral centre", SPECT ACT A, 56(7), 2000, pp. 1385-1389

Abstract

Diastereotopy has been investigated in eight different derivatives of 3,4-dihydroisocoumarins by changing the substituent on the pyran ring chiral centre, C-3. A diastereotopic NMR effect is observed for the prochiral methylene protons on the benzopyran ring and the effect is greatly influenced by the pi-electron system of the substituent. The effect is also observed for the substituents, however, the extent of diastereotopy depends upon their nature and the separation of methylene groups from the chiral centre. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 16:02:17