Sphaeropsidin A C15-C16 Cross-Metathesis Analogues with Potent Anticancer Activity.

Area of Science:

• Natural Product Chemistry
• Medicinal Chemistry
• Cancer Biology

Background:

• Sphaeropsidin A (SphA), a fungal metabolite, combats cancer by inducing apoptosis resistance and cellular shrinkage.
• A previously synthesized pyrene-conjugated SphA derivative exhibited significantly enhanced anticancer potency.

Purpose of the Study:

• To synthesize and evaluate novel SphA analogues with modified hydrophobic groups.
• To develop non-mutagenic anticancer compounds with potency comparable to the pyrene derivative.
• To explore deuterated analogues for intellectual property considerations.

Main Methods:

• Cross-metathesis reactions to create C15,C16-alkene analogues.
• Anticancer activity evaluation across a cancer cell panel.
• Assessment of mutagenicity potential for novel compounds.

Main Results:

• Fifteen novel SphA analogues were synthesized, replacing the pyrene moiety with various hydrophobic groups.
• Several analogues demonstrated high anticancer potency, similar to the pyrene derivative.
• Compounds with pentamethylphenyl and triphenylethylene groups showed particular promise.
• Deuterated pyrene-containing analogues were prepared.

Conclusions:

• Novel SphA analogues exhibit potent anticancer activity and reduced predicted mutagenicity.
• These compounds represent promising lead candidates for cancer therapy development.
• Structural modifications can enhance efficacy and address potential safety and patentability concerns.