Intermediates in the Synthesis of Cembrane Diterpenes. I

The molecular structure of rac-(1R,2R,3S,7S)-3-hydroxy-5-isopropyl-2-methyltricyclo[8.4.0.0^2,7] -4,9-tetradecadien-6-one, C₁₈H₂₆O₂, has an all-cis ring-fusion tricyclic structure, with an overall distorted hemispherical conformation (the hydroxyl group is opposite the other substituents). The cyclohexenone ring is in a half-chair conformation, the cyclohexene ring is in a distorted half-chair conformation, whereas the cyclohexane ring adopts an almost ideal chair conformation. The molecules are linked through a hydrogen bond.

-1