The present work reports the synthesis of some enaminone derivatives bearing a biologically active 3,4-dimethoxyphenyl (3) or 3,4,5trimethoxyphenyl moieties (5 and 7), respectively. The trimethoxybenzene moiety has been previously reported to confer cytotoxic activity. The structure of the newly synthesized compounds was verified by elemental analyses, IR, 1 H NMR, 13 C NMR spectra and X-ray analysis. The anti-breast cancer activity of the enaminone derivatives were evaluated. Compounds 3, 5 and 7 showed excellent anti-breast cancer activity with IC50 values (55.2, 79.06 and 50.49 µM) compared with doxorubicin with IC50 value (71.80 µM) as reference drug.