title: (3R*,6R*,4'S*,8'R*,3''R*,6''R*)-3,3''-Diisopropyl-6,6''-dimethyl-2',6'-di-phenyl-dispiro-[cyclo-hexane-1,4'-(3,7-dioxa-2,6-di-aza-bicyclo-[3.3.0]octa-ne)-8',1''-cyclo-hexa-ne]-2,2''-dione.
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 cyclo-hexane 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.
authors.affiliation: Laboratoire des Substances Naturelles et Synthèse et Dynamique Moléculaire, Faculté des Sciences et Techniques, Errachidia, Morocco.
authors.forename: Abdeslam
authors.initials: A
authors.lastname: Ansari
authors.forename: Lhou
authors.initials: L
authors.lastname: Majidi
authors.forename: Rachid
authors.initials: R
authors.lastname: Fihi
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Daran
authors.forename: Mohamed
authors.initials: M
authors.lastname: Azrour
references.citation: Bioorg Med Chem. 2004 Jan 2;12(1):265-72
references.pmid: 14697792
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677