Now showing items 1-10 of 28
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 ...
Photochemistry of (+)-catechin and (-)-epicatechin
(University of the Free State, 2008-01)
Despite the well known fact that photolysis of free phenolic catechins give rise to isomerisation at the C-2 position (e.g. (-)-cis epicatechin converts to the sterically less hindered (-)-trans isomer), researchers have ...
Development of new "green" methodology for the synthesis of substituted phenylacetic acid derivatives as precursors to isoflavonoids and related compounds
(University of the Free State, 2013-01)
English: Flavonoids and isoflavonoids are known to exhibit many important physiological properties and are especially promising candidates for cancer chemoprevention. Similar to most natural products, studies directed at ...
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 ...
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
Development of a viable protocol aimed at the synthesis of a selected natural product with possible application in the industry
(University of the Free State, 2007)
Since the introduction of synthetic analogues in both the health-related and cosmetic industry, a new generation has emerged in search of beneficial bioactivity compounds. This generation of “natural and green” focuses ...
Structure and synthesis of a novel homoisoflavanone from Scilla natalensis and synthesis of selected procyanidins through the C-4 functionalization of flavan-3-ols
(University of the Free State, 2008-05)
English: Scilla natalensis planch (Hyacinthaceae), commonly known as Wild squill, Blue squill, Blue hyacinth, Blouberglelie, Blouslangkop, Inguduza, is one of the plants that are widely used in traditional medicines and ...
'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 ...