In this thesis, we have synthesized seven 2-(6-Aryl-3(Z)-hexen- 1,5-diynyl)nitrobenzenes. Among them, compounds 33 showed potent cytotoxicity against human leukemia K-562 cell and the IC50 value is 4.96 uM. The cell-cycle analysis shows that these compounds induce a significant blockage in G2/M phase by Flow Cytometric Analysis. An apoptotic progress induction was also shown.