(8S,9R,10S,11S,13S,14S,16S,17R)-4,4-Dichloro-16β-methyl-3,20-dioxo-17,21-bis-(propano-yloxy)-5β,8β-epoxy-pregna-1,9-d...

Area of Science:

• Medicinal Chemistry
• Crystallography
• Organic Chemistry

Background:

• Beclomethasone dipropionate is a widely used glucocorticoid steroid.
• Understanding the structural nuances of steroid derivatives is crucial for drug development.

Purpose of the Study:

• To characterize the three-dimensional structure of a novel beclomethasone dipropionate derivative.
• To analyze the specific conformational features, including epoxide linkage and ring structure.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular structure.
• Analysis of bond angles, deviations from planarity, and root-mean-square (r.m.s.) deviation.

Main Results:

• The compound, C(28)H(34)Cl(2)O(7), possesses an epoxide linkage with a specific angle of 96.6(2)°.
• The dichlorocyclohexenone ring adopts an envelope conformation.
• The dichloro-methyl carbon atom shows a significant deviation (0.471(4) Å) from the ring plane.

Conclusions:

• The detailed structural elucidation provides fundamental insights into this glucocorticoid derivative.
• The conformational analysis contributes to the understanding of structure-activity relationships in steroid-based compounds.