title: (1S,2S,6S,9S)-6-Methyl-5-oxobicyclo-[4.4.0]decane-2,9-diyl diacetate.
abstract: The chiral title compound, C(15)H(22)O(5), is an inter-mediate in the total synthesis of biologically active 9,11-secosterols. In the crystal, the cyclo-hexane rings are trans-fused and both adopt chair conformations. In the crystal, mol-ecules are loosely held together in a layer parallel to (100) by weak inter-molcular C-H⋯O hydrogen bonds accepted by carbonyl O atoms of the acetyl groups.
authors.affiliation: Tallinn University of Technology, Department of Chemistry, Akadeemia tee 15, 12618 Tallinn, Estonia.
authors.forename: Riina
authors.initials: R
authors.lastname: Aav
authors.forename: Kristin
authors.initials: K
authors.lastname: Lippur
authors.forename: Margus
authors.initials: M
authors.lastname: Lopp
authors.forename: Franz
authors.initials: F
authors.lastname: Werner