New cycloartane triterpenoids from Passiflora edulis

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Passiflora edulis, commonly known as passion fruit, is a plant species with a rich history of traditional medicinal uses.
• Triterpenes and saponins are classes of natural compounds known for diverse biological activities.
• Isolation and structural elucidation of novel compounds from plant sources contribute to the discovery of new bioactive molecules.

Purpose of the Study:

• To isolate and characterize cycloartane triterpenes and their saponins from Passiflora edulis.
• To elucidate the chemical structures of the isolated compounds using spectroscopic and chemical methods.

Main Methods:

• Extraction of compounds from the leaf and stem parts of Passiflora edulis.
• Purification of isolated compounds using chromatographic techniques.
• Structural elucidation of compounds 1-8 employing extensive Nuclear Magnetic Resonance (NMR) experiments and chemical derivatization.

Main Results:

• Three cycloartane triterpenes, identified as cyclopassifloic acids E (1), F (2), and G (3), were isolated.
• Five saponins derived from these triterpenes, named cyclopassiflosides VII (4), VIII (5), IX (6), X (7), and XI (8), were also isolated.
• The complete structures of all eight compounds (1-8) were determined through comprehensive NMR analysis and chemical transformations.

Conclusions:

• The study successfully identified and characterized eight new cycloartane triterpenes and their saponins from Passiflora edulis.
• The findings expand the knowledge of the chemical constituents of Passiflora edulis, particularly its triterpenoid saponin profile.
• This research provides a foundation for further investigations into the potential pharmacological properties of these isolated compounds.