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ent-7alpha,18-Hydroxykaur-16-ene ethanol solvate.

Anthony Linden1, F Pinar Sahin, Nurten Ezer

  • 1Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. alinden@oci.unizh.ch

Acta Crystallographica. Section C, Crystal Structure Communications
|May 9, 2006
PubMed
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A novel ent-kaurene diterpene, 7-epicandicandiol ethanol solvate, was isolated from Sideritis ozturkii. Its structure features specific ring conformations and intermolecular hydrogen bonds forming 2D networks.

Area of Science:

  • Natural Product Chemistry
  • Organic Chemistry
  • Structural Chemistry

Background:

  • Diterpenes, particularly ent-kaurene derivatives, are a significant class of natural products with diverse biological activities.
  • Sideritis species are known sources of various bioactive compounds, including diterpenes.

Purpose of the Study:

  • To isolate and characterize a new ent-kaurene diterpene from Sideritis ozturkii.
  • To elucidate the molecular structure, conformation, and intermolecular interactions of the isolated compound.

Main Methods:

  • Isolation of the compound from the aerial parts of Sideritis ozturkii.
  • Structural determination using spectroscopic methods (implied).
  • X-ray crystallography to confirm structure and intermolecular interactions.

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Main Results:

  • The title compound, 7-epicandicandiol ethanol solvate (C20H32O2.C2H6O), was successfully isolated.
  • The ent-kaurene skeleton exhibits typical conformation and stereochemistry, with trans and cis ring junctions.
  • The crystal structure reveals chair/distorted chair conformations for six-membered rings and an envelope for the five-membered ring.
  • Intermolecular hydrogen bonds form two-dimensional networks involving the diterpene and ethanol molecules.

Conclusions:

  • The study reports the isolation and structural characterization of a new ent-kaurene diterpene from Sideritis ozturkii.
  • The detailed structural analysis, including conformational aspects and hydrogen bonding, provides insights into the solid-state behavior of this natural product.