A new diels-alder-type adduct flavonoid from Dorstenia barteri

A Tsopmo; M Tene; P Kamnaing; J F Ayafor; O Sterner

doi:10.1021/np990109o

A new diels-alder-type adduct flavonoid from Dorstenia barteri

J Nat Prod. 1999 Oct;62(10):1432-4. doi: 10.1021/np990109o.

Authors

A Tsopmo¹, M Tene, P Kamnaing, J F Ayafor, O Sterner

Affiliation

¹ Department of Chemistry, University of Dschang, Box 67, Dschang, Cameroon.

PMID: 10543910
DOI: 10.1021/np990109o

Abstract

A new Diels-Alder-type adduct, dorstenone (1), was isolated from Dorstenia barteri together with three known flavonoids, 4,2', 4'-trihydoxy-3'-prenylchalcone; 4,2',4'-trihydoxy-3, 3'-diprenylchalcone; and 5,7,4'-trihydoxy-8-prenylflavone. The structure of 1 was elucidated using a combination of highfield NMR techniques, particularly, gradient-enhanced HMQC and HMBC.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

MeSH terms

Flavonoids / chemistry
Flavonoids / isolation & purification*
Magnetic Resonance Spectroscopy
Molecular Structure
Plants, Medicinal / chemistry*
Spectrum Analysis

Substances

Flavonoids
dorstenone