(1S,3R,8R)-2,2-Di-chloro-3,7,7,10-tetra-methyl-11-methyl-enetri-cyclo-[6.4.0.01,3]dodec-9-ene

摘要

The title compound, C17H24Cl2, was synthesized in four steps from?β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from an essential oil of the Atlas cedar (Cedrus atlantica). The mol-ecule is built from fused six- and seven-membered rings, and an additional three-membered ring. The dihedral angle between the mean planes of the cyclo-hexene and cyclo-heptane rings is 58.37?(19)°. There is an intra-molecular C—H?Cl hydrogen bond present involving a Cl atom and the H atom of the unique methine C atom, forming an?S(5) ring motif. There are no significant inter-molecular inter-actions present.