Crystal structure of a stemodin intermediate

Abstract

Crystals of the title compound, C22H32O3, are monoclinic, P21/n, a = 11.832(1), b = 11.423(1), c = 14.637(1) Å, β = 98.71(2)°, Z = 4. The structure was solved by direct methods and was refined to R = 0.035 for 2052 reflexions with I ≥ 3σ(I). The X-ray study was carried out in order to determine the structures of two diastereomeric products obtained from a key step in a projected synthesis of the diterpenoids aphidicolin and stemodin. The product examined is the stemodin intermediate.