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Titolo:
Diastereotopy in some 3,4-dihydroisocoumarins and related compounds
Autore:
Ansari, MS; Rama, NH; Saeed, A; Bird, CW; Hussain, MT;
Indirizzi:
Quaid I Azam Univ, Dept Chem, Islamabad, Pakistan Quaid I Azam Univ Islamabad Pakistan iv, Dept Chem, Islamabad, Pakistan Univ London Kings Coll, Dept Chem, London W8 7AH, England Univ London Kings Coll London England W8 7AH hem, London W8 7AH, England
Titolo Testata:
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
fascicolo: 1, volume: 77, anno: 2000,
pagine: 39 - 41
SICI:
0019-4522(200001)77:1<39:DIS3AR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONONIS-NATRIX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Rama, NH Quaid I Azam Univ, Dept Chem, Islamabad, Pakistan Quaid I Azam Univ Islamabad Pakistan Chem, Islamabad, Pakistan
Citazione:
M.S. Ansari et al., "Diastereotopy in some 3,4-dihydroisocoumarins and related compounds", J INDIAN CH, 77(1), 2000, pp. 39-41

Abstract

Some complex situations of diastereotopy involving two methylene groups about a chiral centre are reported. In this regard, NMR data for protons at and vicinal to the chiral centre in eight different 3,4-dihydrooisocoumarins(1), as well as eleven related compounds (2) are presented. In the dihydroisocoumarins (1) both methylene groups adjacent to the chiral centre behaveas diastereotopes, except if the proton at this carbon is replaced by hydroxyl or methoxyl; in which case the ring methylene protons at C-4 exhibit only a singlet. On the contrary, the open-chain compounds, (2) exhibit diastereotopy only for the methylene group directly bonded to the aromatic ring.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:31:05