Cyclopropanation of a β-Himachalene Monoepoxide Derivative

The stereochemistry of the title compound, (1S,2R,7S,8S,10R)-9,9-dichloro-1,2-epoxy-2,6,6,10-tetramethyltricyclo[5.5.0.0.^8,10]dodecane, C₁₆H₂₄Cl₂O, a derivative of β-himachalene, has been established. The epoxide bridge located at positions 1 and 2 on the seven-membered ring adopts a cis conformation with respect to the cyclopropane located at positions 8 and 10 on the six-membered ring.

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