Abstract
1-Alkyl-1′-N-para-(ferrocenyl) benzoyl dipeptide esters 4–12 were prepared by coupling the alkyl ferrocenyl benzoic acids 1–3 to the dipeptide ethyl esters Gly-L-Ala(OEt), Gly-L-Leu(OEt) and Gly-L-Phe(OEt) using the standard N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (EDC), 1-hydroxybenzotriazole (HOBt) protocol. All the compounds were fully characterized using a combination of 1H NMR, 13C NMR, DEPT-135 and 1H–13C COSY (HMQC) spectroscopy, electrospray ionization mass spectrometry (ESI-MS) and cyclic voltammetry (CV). Selected compounds showed micromolar activity in the H1299 NSCLC cell line, with IC50 values in the range of 4.5–6.6 μM.
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