Antibacterial and antioxidant activity of Portuguese (Rozeira) Rivas-Martinez and its relation with their chemical composition.

(Rozeira) Rivas-Martinez is an endemic aromatic the Iberian Peninsula, common in semi-arid regions of southern Portugal and southwestern Spain, that produces an active antibacterial essential oil from the leaves and flowers. This work presents the study of the chemical variation in various stages of growth of leaves and flowers of It has been found that the essential oils are mainly constituted by 1,8-cineol, camphor, linalool and trans-α-necrodil acetate. It was also studied the total phenol content and the antioxidant activity on leaves and flowers.

From labdanes to drimanes. Degradation of the side chain of dihydrozamoranic acid.

A new route for the degradation of the saturated side chain of dihydrozamoranic acid has been devised, giving an advanced intermediate, compound 14, useful for the synthesis of insect antifeedants such as warburganal and polygodial.