A series of C5-curcumin bearing morpholine based dithiocarbamates was synthesized. Molinspiration and Osiris software were used for theoretical prediction of physico-chemical properties of these molecules and the majority of the hybrids showed theoretical physico-chemical properties similar or better than curcumin. These hybrids (4a–4v) were evaluated for in vitro cytotoxicity on chronic myeloid leukemia (KBM5) and colon cancer (HCT116) cell lines, and down modulation of TNF-α-induced NF-κB activation at 5 μM. Most of the hybrids exhibit higher cytotoxicity against KBM5 cells compared to HCT116 cell lines. Further, all the hybrids showed potential to suppress the TNF-α-induced NF-κB activation at 5 μM KBM5 cells and seventeen hybrids have shown higher potential to inhibit NF-κB activation in comparison to curcumin.