Hemi-phorboxazole a: structure confirmation, analogue design and biological evaluation

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Pharmacology

Background:

• Hemi-phorboxazole A is a complex natural product.
• The development of synthetic routes and analogues is crucial for drug discovery.
• Understanding structure-activity relationships can guide the design of new therapeutic agents.

Purpose of the Study:

• To achieve the total synthesis of (+)-hemi-phorboxazole A.
• To design, synthesize, and evaluate novel hemi-phorboxazole analogues.
• To assess the biological activity of synthesized compounds against cancer cell lines and fungal pathogens.

Main Methods:

• Total synthesis of (+)-hemi-phorboxazole A from a vinyl iodide precursor in two steps.
• Design and synthesis of two analogues with modified macrolide ring structures.
• In vitro biological evaluation including cytotoxicity assays against human cancer cell lines (HCT-116, SK-BR-3) and antifungal assays against Candida albicans.

Main Results:

• The total synthesis of (+)-hemi-phorboxazole A was successfully achieved with an 85% yield.
• (+)-Hemi-phorboxazole A showed no significant activity against tested cancer cell lines or Candida albicans.
• Analogue (-)-4 demonstrated potent tumor cell growth inhibition in the nanomolar range against HCT-116 and SK-BR-3 cell lines.
• (+)-3 displayed promising antifungal activity against Candida albicans.

Conclusions:

• The synthetic strategy is efficient for accessing hemi-phorboxazole A and its analogues.
• Analogue (-)-4 represents a promising lead compound for anticancer drug development.
• (+)-3 shows potential as an antifungal agent.