tempo and Carcinoma--Squamous-Cell

4-anilinoquinazoline and 4-anilinoquinoline scaffolds bearing a 2,2,6,6-tetramethylpiperidine-N-oxyl(TEMPO) have been synthesized and evaluated for their ability to inhibit EGFR tyrosine kinase and A431 cell lines. Compared to their corresponding parent compounds, all of the new compounds bearing a TEMPO showed more efficient inhibition for EGFR and A431 cells. Furthermore, we have proved that these molecules bearing a TEMPO can exactly get into A431 cells exerting inhibitory effect that may be used for EPR detecting. In our docking model, quinazolines bearing a TEMPO on either 6- or 3-positions took different linking modes according to EGFR crystal structure. In contrast to their parent compounds, these new TEMPO-derived analogues possessed compatible inhibitory effect that might be useful as potential EGFR inhibitors and as EPR bio-probes.

Topics: Antineoplastic Agents; Carcinoma, Squamous Cell; Cell Line, Tumor; Cell Proliferation; Electron Spin Resonance Spectroscopy; ErbB Receptors; Humans; Models, Molecular; Piperidines; Protein Kinase Inhibitors; Quinazolines; Quinolines; Spin Labels