Abstract
Background: In this investigation, 2-cyano-N-(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-)1) acetamide (3) reacts with dimethylformamide dimethyl acetal (DlIF-DA14) to afford the corresponding (E)2-cyano-3-(dimethylamino)-N-(2,4-dioxo-1,2,3,4-tetrahydrop)rimidin-5-yl)acrylam-ide (4) utilizing microwave irradiation. The condensation reactions of acrylamide derivative 4 with hydrazine derivatives obtain pyrazole derivatives 6a and 6b; respectively. The synthesized compounds demonstrate in vitro antitumor activity against liver tumor cell line HepG2. Furthermore, additional studies were carried out on the most effective compound 6b to evaluate the potential interaction against 4hdq synthase complex with Lambda E= -4.5Kcalltnol and with short distance 1.727 angstrom and 2.027 angstrom, respectively. The comprehensive theoretical studies of compounds 6a and 6b is based on bond length, bond angles and energy gap HOMO-LUMO. In addition, the vibrational frequencies of optimized compounds 6a and 6b were examined through DFT/B3LYP/6+31G(d) basis set.
Methods: In this research, synthesis of novel pyrimidiopyrazole derivatives calculated the computational studies to find suitable drug-receptor interactions and biological activity.
Results and Discussion: The synthesized pyrimidiopyrazole derivative Gb exhibited high antitumor activity IC50 =12.6 mu g/ml and interacted it with 4hdq synthase complex with AF=-4.5Kcalimol and with short distance = 1.727 angstrom and 2.027 angstrom. Furthermore, the optimized compounds utilize Gaussian 09W.
Conclusion: In the optimized pyrimidiopyrazole derivatives, 6b showed better antitumor activity HeG-2 against 5-flurouracil due to its energy and confirmed more potent of hydrogen bond interaction with protein pocket.