Related Experiment Video
Updated: Jun 1, 2026
06:52
Synthesis of Esters Via a Greener Steglich Esterification in Acetonitrile
Published on: October 30, 2018
Absolute configuration of isoeichlerialactone
Summary
A novel seco-dammarane triterpenoid was isolated from Aglaia forbesii seeds. Its structure and absolute configuration were determined using crystallographic methods, revealing specific ring conformations and hydrogen bonding in the crystal lattice.
Area of Science:
- Natural Product Chemistry
- Organic Chemistry
- Structural Biology
Background:
- Aglaia species are known sources of bioactive compounds.
- Triterpenoids represent a diverse class of natural products with various pharmacological properties.
- Isolation of new chemical entities from plant sources is crucial for drug discovery.
Purpose of the Study:
- To isolate and characterize a novel seco-dammarane triterpenoid from Aglaia forbesii seeds.
- To determine the absolute configuration and crystal structure of the isolated compound.
- To contribute to the understanding of triterpenoid diversity in the Aglaia genus.
Main Methods:
- Isolation of the compound using chromatographic techniques.
- Structure elucidation via spectroscopic methods (NMR, MS).
- Determination of absolute configuration and crystal structure through X-ray diffraction analysis, including Flack parameter refinement.
Main Results:
- A new seco-dammarane triterpenoid, C(27)H(42)O(4), was successfully isolated.
- The molecule features a trans-fused tricyclic core with specific ring conformations (chair and envelope).
- The absolute configuration was confirmed, and intermolecular O-H⋯O hydrogen bonds forming chains were observed in the crystal structure.
Conclusions:
- The study reports the first isolation of this specific seco-dammarane triterpenoid from Aglaia forbesii.
- The detailed structural and stereochemical characterization provides valuable data for natural product chemistry.
- The findings enhance the knowledge of chemical diversity within the Aglaia genus and potential for further research.
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