Abstract
The chemical synthesis of 3 β- p-bromobenzoyloxy-15 β-methyl-5 α,14 β-cholest-7-en-15 α-ol from 15β-methyl-5α, l4β-cholest-7-ene-3β,15α-diol is described. The structure of the former compound was unambiguously determined by X-ray crystallographic analysis. The space group of the crystal was P2 1 with unit cell parameters a = 12.611 A ̊ , b = 9.826 A ̊ , c = 13.221 A ̊ , b = 91.71° and Z = 2. The structure was solved by the heavy atom method and refined to a final R of 0.041. Asymmetry parameters indicated that ring A is a symmetrical chair, that rings B and C are half chairs, and that ring D is a 15α-envelope.
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