Green synthesis, molecular docking and in vitro biological evaluation of novel hydrazones, pyrazoles, 1,2,4-triazoles and 1,3,4-oxadiazoles

Ultrasonic waves were used for synthesis of novel hydrazones, bishydrazones, pyrazoles, 1,2,4-triazole and 1,3,4-oxadiazole. The structural formulae of the synthesized compounds were elucidated in terms of elemental and spectroscopic analyses. All synthesized compounds were estimated by testing total antioxidant capacity, iron-reducing power, the scavenging activity against ABTS and DPPH radicals in addition to testing anti-diabetic, anti-Alzheimer and anti-arthritic activities. All compounds displayed good to potent bioactivity. Compounds 6, 10 exhibit the highest antioxidant and free radicals scavenging activities. Furthermore, compounds 6, 10 demonstrate the strongest inhibition of alpha-amylase and alpha-glucosidase. Compound 12 exhibit strongest acetylcholinesterase inhibition among prepared compounds. However, compounds 18a,b, 19 show a significantly higher inhibition percentage for protein denaturation and proteinase. The most bioactive prepared compounds 6, 10 and 12 were investigated toward docking methodology against appropriate protein.