cinnamosmolide and larixol

The paper describes a new pathway for an efficient synthesis of natural and bioactive drimanic compounds ( - )-pereniporin B (1) and ( - )-cinnamosmolide (2) from ketodiol 7, an intermediate obtained before from accessible labdane diterpenoid (+)-larixol (3). The key step involves allylic bromination of acetate 8 with N-bromosuccinimide. The in vitro antimicrobial and antifungal activities of all compounds are also reported. Their structures were confirmed by both spectroscopic data and chemical transformations.

Topics: Antifungal Agents; Antineoplastic Agents; Diterpenes; Molecular Structure; Nuclear Magnetic Resonance, Biomolecular; Sesquiterpenes; Stereoisomerism