Crystal Structure and Synthesis of 3β-Benzoyloxy-4-pregnen-16α,17α-epoxy-6,20-dione

Abstract

C₂₈H₃₂O₅ is monoclinic, P₂₁. The unit-cell dimensions at 293 K are a = 10.1694(8), b = 7.4489(6), c = 15.5492(12)Å, β = 91.772(2)°, V = 1177.30(16)ų, D_x = 1.265 g/cm³ and Z = 2. The R value is R = 0.040 for 4108 reflections. The A, B, C and D rings occur in envelope, distorted chair, distorted chair, and distorted envelope conformations. The molecules in the crystal are packed at the normal van der Waals distances.