Now showing items 1-10 of 21
Direct synthesis of pterocarpans via aldol condensation
(University of the Free State, 2000-05)
English: Pterocarpans, representing the second largest group of natural isoflavonoids, have received considerable interest on account of their medicinal properties over the last few years. These phytoalexins not only ...
The constitution of oligomeric benzofuranoids
(University of the Free State, 1999-05)
English: Berchemia zeyheri is known for its unique red heartwood, a property that was probably responsible for the first phytochemical investigation into the flavonoid content of this tree. The heartwood contains a unique ...
Struktuurondersoek van die isoflavanoïde uit Neorautanenia ficifolia (Benth ex Harv.) C.A. Sm.
(University of the Free State, 1965-01)
Abstract not available
Studies directed at the stereoselective synthesis of flavonoids through the hydrogenation of prochiral precursors
(University of the Free State, 2008-11)
English: The in vitro studies of biologically active flavonoids are hampered by the inaccessibility of all monomeric units in enantiomerically pure form. Although a number of these scalemic flavonoids can be obtained ...
Conformational analysis of oligomeric profisetinidins
(University of the Free State, 2007-02)
English: The profisetinidins are an important class of condensed tannins, or proanthocyanidins. Historically, studies towards the structure and conformation of proanthocyanidins were done on their peracetate and permethyl ...
Development of methodology for the synthesis of 4-arylflavan-3-ol lactones
(University of the Free State, 2008-05)
English: The phenolic content of the heartwood of Peltophorum africanum (African wattle) and Burkea africanum (Red syringa) proved to contain a variety of compounds including the novel 4-arylflavan-3-ol lactones, ...
'n Ondersoek na die antibakteriese eienskappe van Carpobrotus edulis L.
(University of the Free State, 1999-11)
English: In the folk medicine of South Africa, many traditional medicinal plants are used by both the rural and a small percentage of the city population. One of these plants is Carpobrotus edulis L. An investigation of ...
Epimesquitol-flavone dimers and related oligomers from Acacia nigrescens synthesis of 3',4',7,8-substituted flavonoid monomers
(University of the Free State, 2001-11)
English: The previous investigation, by Fourie in the 1970's, revealed the presence of phenolic compounds in the heartwood of Knobwood (Acacia nigrescens), comprising a series of leucomelacacinidins. Early suggestions that ...
Synthesis of isoflavonoid-neoflavonoid oligomers
(University of the Free State, 1999-08)
English:A recent phytochemical study on the heartwood of the Purplewood Dalbergia (Dalbergianitidula) in our laboratories led to the isolation of the first pterocarpan-neoflavonoid dimers, Daljanelins A-C, and an ...
Biflavonoied diastereo-isomere en hul biogenetiese voorlopers uit Berchemia SPP.: pogings tot sintese van analoe
(University of the Free State, 1976-02)
Afrikaans: Hierdie studie behels die struktuurondersoek, omskakelingsreaksies en pogings tot sintese van sommige van die mono- en biflavonoïede uit die kernhout van Berchernia zeyheri met 'n aanvullende studie op die ...