In this study, a new series of 1,3-dimethyl-6-(amino aceto hydrazine) pyrimidine-2,4- dione-6-yl with 4-substituted benzyldehyde, The compound (1-5) was synthesized in a single pot that cyclization by the addition of sodium azide, 2-mercapto acid & 2-amino acetic acid to produce five-membered heterocyclic rings includes: tetrazoline-1yl (6-10), thiazolidin-4-one (11-15) and imidazolidin-4-one (16-20) derivatives respectively. These compounds were characterized using spectral methods [FTIR and 1HNMR, 13C-NMR for some of them] evaluations, measurements, and analyses of their physical qualities. Each molecule was evaluated for antioxidant activity in vitro to use the DPPH and phosphomolybdenum methods. When compared to the standard drug Ascorbic acid, (1-20) demonstrated promising antioxidant activity among the bioactive molecules synthesized. Furthermore, molecular docking against, substances showed superiority over the standard medication Exemestane in tests of the Aromatase enzyme.