(1S,3R,8R,9S,11R)-2,2,10,10-Tetrachloro-3,7,7,11-tetramethyltetracyclo[6.5. 0.01,3.09,11]tridecane

Abstract

The title compound, C17H24Cl4, was synthesized from β-himachalene (3,5,5,9-tetramethyl-2,4a,5,6,7,8-hexahydro- 1H-benzocycloheptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The molecule is built up from fused six- and seven-membered rings and two three-membered rings from the reaction of β-himachalene with dichlorocarbene. The six-membered ring shows a chair conformation, whereas the seven-membered ring displays a boat conformation.