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Structure of 9 beta-estrone.

W L Duax1, J F Griffin, P D Strong

  • 1Medical Foundation of Buffalo, Inc., NY 14203-1196.

Acta Crystallographica. Section C, Crystal Structure Communications
|May 15, 1991
PubMed
Summary
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This study details the crystal structure of a 9 beta-estrone analogue, revealing a unique B ring conformation. This research contributes to understanding estrogenic activity through novel compound synthesis and analysis.

Area of Science:

  • Steroid chemistry
  • Crystallography
  • Medicinal chemistry

Background:

  • Estrogen receptor modulators are crucial in medicine.
  • Understanding structure-activity relationships is key to developing new therapeutics.
  • Beta-estrone analogues represent a class of compounds with potential biological activity.

Purpose of the Study:

  • To elucidate the crystal structure of a novel 9 beta-estrone analogue.
  • To investigate the impact of the 9 beta-configuration on steroid B ring conformation.
  • To provide structural insights for the design of new estrogenic compounds.

Main Methods:

  • Single crystal X-ray diffraction was employed to determine the molecular structure.
  • The crystal system and space group were identified as monoclinic, P2(1).

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  • Unit cell parameters and atomic coordinates were refined to R = 0.037.

    • Main Results:

    • The crystal structure of 3-Hydroxy-9 beta-estra-1,3,5(10)-trien-17-one was determined.
    • A distinct 7 beta,8 alpha-half chair conformation of the B ring was observed, influenced by the C9 configuration.
    • An intramolecular hydrogen bond between O3 and O17 was identified.

    Conclusions:

    • The 9 beta-configuration significantly alters the steroid B ring conformation.
    • The determined structure provides a basis for understanding the structure-activity relationship of beta-estrone analogues.
    • This work aids in the rational design of compounds targeting estrogenic pathways.