Abstract
The syntheses and characterization of C4 and C5 substituted N,N′-bis(arylmethyl)imidazolium salts with hydrophilic or lipophilic substituents on the imidazole ring are reported. A structure-activity relationship study revealed that the lipophilicity of groups at the C4 and C5 positions plays a crucial role in modulating the efficacy against select non-small cell lung cancer cell lines tested. Compounds 11–17 were determined to be the most active against the panel of cell lines studied. Compounds 11 and 12 were examined by the National Cancer Institute's Developmental Therapeutic Program where they were tested against the NCI-60 human cancer cell line panel in a one-dose and five-dose assay. Compound 11 had high activity against the nine lung cancer lines tested while 12 had cytotoxic effects against 59 of the 60 cell lines. Compound 11 was also studied in a murine model to determine its in vivo toxicity.
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