Antiplatelet activity, molecular docking and QSAR study of novel N'-arylmethylidene-3-methyl-1-phenyl-6-p-chlorophenyl-1H-pyrazolo[3,4-b] pyridine-4-carbohydrazides

A series of novel N'-arylmethylidene-3-methyl-1-phenyl-6-p-chlorophenyl-1H-pyrazolo[3,4-b]pyridine-4-carbohydrazide (2a-2t) has been synthesized from hydrazide (1). The structures of newly synthesized compounds were confirmed by FT-IR, EI-MS, H-1 NMR and C-13 NMR techniques. The title compounds were evaluated for antioxidant and antiplatelet aggregation effect induced by arachidonic acid (AA) and collagen. All the compounds have exhibited high antioxidant potential and antiplatelet activity but (2c, 2e, 2f, 2g, 2i, 2m, 2o and 2q) have revealed superlative antiplatelet activity. The molecular docking against cyclooxygenase-1 and 2 (COX-1 and COX-2) and quantitative structure-activity relationship (QSAR) were performed in describing their antiplatelet potential against AA and collagen along with antioxidant potential determined by ABTS, DPPH and iron chelating methods. The molecular docking study exhibited that compounds (2c, 2e, 2f, 2g, 2i, 2l, 2m, 2o and 2q) were found to be active against COX-1 while 2o compound also showed activity against COX-2. Compounds 2g and 2l were found to have higher energy stabilization values in comparison to Aspirin. Computational evaluations both molecular docking and QSAR are in good agreement with antiplatelet and antioxidant activities of the compounds (2a-2t). All the compounds especially 2g, 2l, 2m might be promising antiplatelet agents and might be helpful in the synthesis of new drugs for the treatment of cardiovascular and anti-inflammatory diseases.