Unconventional chalcogen-containing azolylidene metal complexes as potential anticancer therapeutics

Area of Science:

• Medicinal Inorganic Chemistry
• Organometallic Chemistry
• Drug Discovery

Background:

• N-heterocyclic carbene (NHC) ligands are crucial in organometallic compounds with anticancer and antimicrobial properties.
• Imidazole and benzimidazole derivatives are common scaffolds, but chalcogen-containing azolylidene ligands ((N,Y)HCs) are underexplored.

Purpose of the Study:

• To investigate the impact of incorporating chalcogen atoms (O, S, Se) into NHC ligands.
• To synthesize and evaluate (N,Y)HC analogues of known platinum, gold, and ruthenium complexes.

Main Methods:

• Synthesis of novel (N,Y)HC ligands and their metal complexes.
• Characterization of electronic and steric properties of ligands and complexes.
• Evaluation of cytotoxicity against ovarian cancer cell lines.

Main Results:

• Chalcogen incorporation modulated ligand properties and metal complex interactions with biomolecules.
• The novel (N,Y)HC complexes exhibited regulated cytotoxicity against ovarian cancer cells.
• This suggests potential for developing new metallodrugs.

Conclusions:

• The introduction of chalcogen atoms in azolylidene ligands is a promising strategy in medicinal inorganic chemistry.
• These findings open new avenues for designing metal-based therapeutics, particularly for ovarian cancer.