Brasilixanthone.

Area of Science:

• Natural Product Chemistry
• Crystallography
• Organic Chemistry

Background:

• Cratoxylum formosum ssp. pruniflorum is a plant species known for its potential bioactive compounds.
• Xanthones are a class of organic compounds with a dibenzopyran-4-one core structure, often exhibiting diverse biological activities.

Purpose of the Study:

• To isolate and characterize a novel xanthone derivative from the roots of Cratoxylum formosum ssp. pruniflorum.
• To elucidate the crystal structure of the isolated xanthone derivative using X-ray diffraction analysis.

Main Methods:

• Isolation of the target compound using chromatographic techniques.
• Structure determination through single-crystal X-ray diffraction.
• Analysis of molecular geometry, conformation, and intermolecular interactions.

Main Results:

• A novel xanthone, 5,13-dihydroxy-3,3,10,10-tetramethyl-3H-dipyrano[3,2-a:2',3'-i]xanthen-14(10H)-one, was successfully isolated.
• The crystal structure revealed two molecules in the asymmetric unit with near-planar xanthone skeletons and sofa conformations in the pyran rings.
• Intramolecular hydrogen bonds and intermolecular π-π stacking interactions, along with C-H···O and C-H···π interactions, were identified as key stabilizing forces in the crystal structure.

Conclusions:

• The study successfully isolated and structurally characterized a new xanthone from Cratoxylum formosum ssp. pruniflorum.
• The detailed crystallographic analysis provides insights into the molecular packing and stabilizing interactions within the crystal lattice.
• This research contributes to the understanding of xanthone chemistry and the structural diversity of natural products.