3β-Acet-oxy-12-oxoolean-28-oic acid benzyl ester

Area of Science:

• Organic Chemistry
• Structural Chemistry
• Crystallography

Background:

• Understanding the three-dimensional structure of complex organic molecules is crucial for predicting their properties and reactivity.
• Fused ring systems are common motifs in natural products and pharmaceuticals, necessitating detailed structural analysis.

Purpose of the Study:

• To elucidate the precise three-dimensional structure of the title compound, C(39)H(56)O(5).
• To characterize the conformational preferences of the fused ring system and the orientation of its substituents.

Main Methods:

• X-ray crystallography was employed to determine the solid-state structure.
• Conformational analysis was performed based on the determined atomic coordinates.

Main Results:

• The molecule C(39)H(56)O(5) features a pentacyclic core comprising five fused six-membered rings.
• Four rings (A, B, D, E) adopt a chair conformation, while ring C exhibits a half-chair conformation.
• The acetoxy and carboxybenzyl groups are confirmed to occupy equatorial positions.

Conclusions:

• The detailed structural and conformational analysis provides a fundamental understanding of this specific pentacyclic compound.
• The observed stereochemistry and substituent positioning are key features influencing the molecule's overall shape and potential interactions.