Absolute configuration of fibaruretin B

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Phytochemistry

Background:

• Arcangelisia flava is a plant species known for its potential medicinal properties.
• Diterpenoids are a class of terpenes derived from isoprene units, often exhibiting diverse biological activities.

Purpose of the Study:

• To isolate and elucidate the structure of a novel compound from Arcangelisia flava roots.
• To determine the absolute configurations and crystal structure of the isolated compound, fibaruretin B.

Main Methods:

• Isolation of fibaruretin B from the roots of Arcangelisia flava.
• Spectroscopic analysis (e.g., NMR, MS) for structural determination.
• X-ray crystallography for absolute configuration and crystal structure analysis.

Main Results:

• Identification of fibaruretin B, a furan-oditerpenoid, with the chemical formula C(20)H(24)O(7).
• Determination of the absolute configurations at eight stereocenters (2, 3, 4, 4a, 7, 9, 10a, 10b) as S, R, S, R, S, S, S, and S, respectively.
• Crystal structure analysis revealed molecular chains linked by O-H⋯O hydrogen bonds and weak C-H⋯O interactions along the c axis.

Conclusions:

• Fibaruretin B is a newly identified furan-oditerpenoid with a defined stereochemical structure.
• The crystal structure provides insights into the intermolecular interactions and solid-state arrangement of fibaruretin B.
• This study contributes to the understanding of the chemical constituents of Arcangelisia flava.