Reactivity of chalcones with 1-hydroxymethyl radicals.

Reactivity of chalcones with reactive species issued from methanol radiolysis was investigated in the absence or presence of dioxygen. Chalcones are natural antioxidants that are present in fruit and vegetables. Their degradation in the radiolysed solutions was followed by HPLC, NMR, FAB-LSIMS mass spectroscopy and analytical TLC in deaerated solution.

Radiolytic transformation of 2,2',4'-trihydroxychalcone.

Radiolysis of 2,2',4'-trihydroxychalcone, a natural antioxidant present in fruit and vegetables, was performed in ethanol in the absence or in the presence of dioxygen. The degradation process of chalcone was followed in de-aerated solution by HPLC, NMR, FAB-LSIMS mass spectroscopy and analytical TLC. Under anaerobic conditions, six new products (three couples of diastereoisomers) were identified.