Abstract
New benzimidazolium salts 1a-d having methylpyridine group on the side chain, have been synthesized and reacted with Ag2O to produce Ag(I)-N-heterocyclic carbene (NHC) complexes 2a-d. Ag(I)-N-heterocyclic carbene (NHC) complexes were used as a carben transfer agents to synthesize water-soluble ruthenium(II)-NHC complexes 4a-d. All synthesized compounds were fully characterized by 1H and 13C NMR and HRMS spectroscopic techniques. Anticancer potential and IC50 values of ruthenium(II)-NHC complexes were evaluated by MTT assay against human colorectal cancer (Caco-2) and breast cancer (MCF-7) cell lines. The IC50 value of water-soluble ruthenium(II)-NHC complex 4d demonstrated remarkable cytotoxic activity against Caco-2 (18.0 ± 1) and MCF-7 (23.8 ± 0.5) cell lines. Also, 4d has better DNA binding capacity than 4a-c. DS 2017 R2 was used to exert molecular docking for understanding interactions between the water-soluble ruthenium(II)-NHC complexes and DNA. These complexes have been highlighted as a new type of drug.
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