Please use this identifier to cite or link to this item: http://hdl.handle.net/10311/258
Title: Diprenylated chalcones and other constituents from the twigs of Dorstenia barteri var. subtriangularis
Authors: Ngameni, B.
Ngadjui, B.
Folefoc, G.
Watchueng, J.
Abegaz, B.
Keywords: Dorstenia barteri var. subtriangularis
Moraceae
Twigs
Isolation
Prenylated chalcones
Bartericins A, B and C
Issue Date: 2003
Publisher: Elsevier Ltd; www.elsevier.com/locate/phytochem
Citation: Ngameni, B. et al (2003) Diprenylated chalcones and other constituents from the twigs of Dorstenia barteri var. subtriangularis, Phytochemistry, Vol. 65, pp. 427-432
Abstract: The twigs of Dorstenia barteri var. subtriangularis yielded three diprenylated chalcones: ( )-3-(3,3-dimethylallyl)-50-(2-hydroxy-3- methylbut-3-enyl)-4,20,40-trihydroxychalcone, (+)-3-(3,3-dimethylallyl)-40,50-[2000-(1-hydroxy-1-methylethyl)-dihydrofurano]-4,20- dihydroxychalcone and 3,4-(600,600-dimethyldihydropyrano)-40,50-[2000,-(1-hydroxy-1-methylethyl)-dihydrofurano]-20-hydroxychalcone for which the names bartericins A, B and C, respectively, are proposed. Stipulin, b-sitosterol and its 3-b-D-glucopyranosyl derivative were also isolated. The structures of these secondary metabolites were determined on the basis of spectroscopic analysis, especially, NMR spectra in conjunction with 2D experiments, COSY, HMQC and HMBC. The structural relationship of bartericins B and C was further established by the chemical cyclization of one to the other.
URI: http://hdl.handle.net/10311/258
ISSN: 0031-9422
Appears in Collections:Research articles (Dept of Chemistry)

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