(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.