Résumé:
The objective of our work is the study of the products of the secondary metabolism, and more
especially the flavonoids of some species of the Algerian flora, which did not see studies of
the point of view chemical composition.
Even if they are two families among the most known of the plant world. This family has been
known for a long time as a food source (parsley, celery, carrot, fennel, coriander ...) and
known in traditional medicine, for its anti-inflammatory, diuretic and antispasmodic
properties ...
Four compounds have been isolated from the aerial parts of the species solanum rostratum
belongs to the solanaceae family; two products have been identified of which four are
mentioned for the first time in the genus. And nineteen others of the species galactites elegans
belong to the family ASTRACEAE. All products have been cited for the first time in the genre.
To achieve our objectif, we used different extraction, separation and purification methods
based mainly on chromatographic techniques, which allowed us to separate the twenty-three
products from the aerial parts of these species.
The separated products were identified by spectral methods of analysis, especially nuclear
magnetic resonance spectroscopy and its sequences (NMR-1H, NMR-13C,, COSY, HSQC and
HMBC), UV-Visible and mass spectroscopy and also chemical analyzes for some products.
The majority of the compounds isolated from the hyhdromethanolic extract of the species S.
rostratum, G. elegans showed a great capacity of the antioxidant power
