Four naphthalimide derivatives 2-5 modified with various alkylenediamines at 4-position have been designed
and synthesized. Their anticancer activities were preliminarily evaluated, which showed potent anticancer activities
against A549 cell line with IC50 values lower than 5 µM. Furthermore, the DNA binding properties of 2 with calf thymus
(Ct) DNA were investigated by UV-Vis, fluorescence, and circular dichroism (CD) spectroscopies and thermal denaturation
experiment. The results showed that compound 2 as the DNA intercalator exhibited strong binding affinity with Ct-
Keywords: Naphthalimide, DNA intercalator, Alkylenediamines, Anticancer, DNA binding, Fluorescence.
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