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Acta Cryst. (2014). E70, o526
[ doi:10.1107/S1600536814007351 ]

(1R,4R,6S,7R)-5,5-Di­bromo-1,4,8,8-tetra­methyl­tri­cyclo­[5.4.1.04,6]dodecan-12-one

M. Zaki, A. Benharref, J.-C. Daran and M. Berraho

Abstract: The title compound, C16H24Br2O, was synthesized from the reaction of [beta]-himachalene (3,5,5,9-tetra­methyl-2,4a,5,6,7,8-hexa­hydro-1H-benzo­cyclo­heptene), which was isolated from Atlas cedar (Cedrus atlantica). The asymmetric unit contains two independent mol­ecules with similar conformations. Each mol­ecule is built up from two fused seven-membered rings and an additional three-membered ring. In both mol­ecules, one of the seven-membered rings has a chair conformation, whereas the other displays a screw-boat conformation.


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