Abstract EN:

This work was carried out in the "Laboratoire de Chimie Analytique de l'environnement" in partnership with the ADRIAN company. Ylang-ylang (Cananga odorata, annonaceae) is a tree found in tropical areas. This species is cultivated on a large scale in the Comoro Islands and Madagascar for the production of essential oils, mainly used in perfume and soap industries, obtained after hydro-distillation of flowers. This tree is pruned twice a year to keep it to an average height of two meters. Unfortunately, cuttings from pruning are still not valorized. Since annonaceous species are known to contain bioactive constituents, the aim of this study was to find some bioactive compounds in ylang-ylang. Moreover, due to the difficult economical context in the Comoro Islands, processing the cuttings could be an additional income. First, an extraction procedure of leaves and branches of ylang-ylang was set up. Then, extracts were analysed by HPLC. This study led to isolate two glycosilated flavonoids and two y-lactones compounds. One of these y-lactones appeared to be a new compound,designated as canangone. Structural elucidation of these molecules was done by IR/TF, MS and NMR spectroscopy. Study of biological activities of both extract and purified compound was performed determining their pesticidal, antimicrobial, antioxidant and antitumoral properties. This study showed a significant bioactivity for each extract and purified compound. Another industrial application was explored: the use of the ylang-ylang extract as preservative agent in the food industry. . .