Benzoylcyclopropane Derivatives from Hypoxis hemerocallidea Corms

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Medicinal Chemistry

Background:

• Hypoxis hemerocallidea is a plant with a history of traditional medicinal use.
• Benzoylcyclopropane analogs are a class of compounds with potential biological activities.
• Isolation of novel natural products provides opportunities for drug discovery.

Purpose of the Study:

• To isolate and characterize novel benzoylcyclopropane derivatives from Hypoxis hemerocallidea.
• To investigate the antimicrobial potential of these new compounds and previously identified metabolites.

Main Methods:

• Hydro-alcoholic extraction of Hypoxis hemerocallidea corms.
• Structure elucidation using 1D/2D-NMR and HRESIMS.
• Determination of absolute configuration via NOESY NMR and ECD analysis.
• In vitro antimicrobial screening against bacterial and fungal strains.

Main Results:

• Five benzoylcyclopropane derivatives (hypoxhemerol A, hypoxhemeroloside G, hypoxhemerol B, hypoxhemeroloside H, and hypoxhemeroloside I) were isolated.
• This marks the first isolation of benzoylcyclopropane analogs from a natural source.
• Curcapicycloside and acuminoside demonstrated significant antibacterial activity against Escherichia coli.
• Hypoxhemeroloside A exhibited mild antifungal activity against Cryptococcus neoformans.

Conclusions:

• Hypoxis hemerocallidea is a source of novel benzoylcyclopropane derivatives.
• Some isolated compounds possess notable in vitro antimicrobial properties.
• Further research into these compounds may lead to the development of new antimicrobial agents.