Abstract
The title compound, C16H23BrCl2O, was synthesized in three steps 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 two fused six- and seven-membered rings, each linked to a three-membered ring. The six-membered ring has a screw-boat conformation, whereas the seven-membered ring displays a twist-boat conformation. The absolute structure was established unambiguously from anomalous dispersion effects.
Highlights
The title compound, C16H23BrCl2O, was synthesized in three steps from -himachalene (3,5,5,9-tetramethyl-2,4a,5,6,7,8hexahydro-1H-benzocycloheptene), which was isolated from the essential oil of the Atlas cedar
The molecule is built up from two fused six- and seven-membered rings, each linked to a three-membered ring
Supporting information for this paper is available from the IUCr electronic archives (Reference: RZ5154)
Summary
The title compound, C16H23BrCl2O, was synthesized in three steps from -himachalene (3,5,5,9-tetramethyl-2,4a,5,6,7,8hexahydro-1H-benzocycloheptene), which was isolated from the essential oil of the Atlas cedar (cedrus atlantica). Ahmed Benharref,a Lahcen El Ammari,b Mohamed Saadib and Moha Berrahoa* ALaboratoire de Chimie des Substances Naturelles, Unite Associeau CNRST (URAC16), Facultedes Sciences Semlalia, BP 2390 Bd My Abdellah, 40000 Marrakech, Morocco, and bLaboratoire de Chimie du Solide Appliquee, Facultedes Sciences, Universite Mohammed V, Avenue Ibn Battouta, BP 1014, Rabat, Morocco. Received 27 March 2015; accepted 31 March 2015
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