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Acta Cryst. (2013). E69, o1162-o1163  [ doi:10.1107/S1600536813017054 ]

(3R*,6R*,4'S*,8'R*,3''R*,6''R*)-3,3''-Diisopropyl-6,6''-dimethyl-2',6'-diphenyldispiro[cyclohexane-1,4'-(3,7-dioxa-2,6-diazabicyclo[3.3.0]octane)-8',1''-cyclohexane]-2,2''-dione

A. Ansari, L. Majidi, R. Fihi, J.-C. Daran and M. Azrour

Abstract: The two oxazolidine rings (A and B) of the title compound, C34H44N2O4, display roughly half-chair conformations, which could be described as twisted on the C-O bond. Together, the fused oxazolidine rings have a butterfly shape, with the H atoms attached to the ring junction C atoms in a cis orientation. The cyclohexane rings of both p-menthone fragments display chair conformations. The absolute configuration could not be determined from the X-ray diffraction data, but the relative configuration of the stereocentres could be deduced.


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