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Absolute configuration determination of the dihydroxyethyl moiety of "hordeum vulgare" chlorophyll catabolites : Enantiomeric excess determination of α-amino acides by 19F NMR spectroscopy with a new fluorinated organometallic chiral derivatizing agent

Levrat, Fabrice ; Engel, Norbert (Dir.) ; Schneider, Manfred (Codir.)

Thèse de doctorat : Université de Fribourg, 2003 ; no 1405.

During senescence, chlorophyll of higher plants is degraded into linear tetrapyrrolic catabolites. Their in vitro oxidation with chromic acid furnishes the constituting pyrrolic moieties as maleimides fragments. The substitution patterns of the isolated maleimides are related to the catabolites structures. All maleimides bear the characteristic methyl group of the former chlorophyll as well as a...