Herein, the synthesis of a nucleoside platinum(II) complex in which a cisplatin-like unit is joined to 7-deazaadenosine through an amino alkyl chain installed at the C6 position of purine was explored. The capability of the new complex to react with DNA purine bases was confirmed by a model reaction with deoxyguanosine monophosphate, whereas its antiproliferative activity against A549 and Cal27 human cancer cell lines was studied by sulforhodamine B assay in comparison with its unplatinated precursor and cisplatin.