Shaik_2019_Bioorg.Chem_88_102960

In a search for novel multifunctional anti-Alzheimer agents, a congeneric set of seventeen flavone-8-acrylamide derivatives (8a horizontal line q) were synthesized and evaluated for their cholinesterase inhibitory, antioxidant, neuroprotective and modulation of Abeta aggregation activities. The target compounds showed effective and selective inhibitory activity against the AChE over BuChE. In addition, the target compounds also showed moderate anti-oxidant activity and strong neuroprotective capacities, and accelerated dosage-dependently the Abeta aggregation. Also, we presented here a complete study on the interaction of 8a, 8d, 8e, 8h and 8i with AChE. Through fluorescence emission studies, the binding sites number found to be 1, binding constants were calculated as 2.04x10(4), 2.22x10(4), 1.18x10(4), 9.8x10(3) and 3.2x10(4) M(-1) and free energy change as -5.83, -5.91, -5.51, -5.41 and -6.12kcalM(-1) at 25 degrees C which were well agreed with the computational calculations indicating a strong binding affinity of flavones and AChE. Furthermore, the CD studies revealed that the secondary structure of AChE became partly unfolded upon binding with 8a, 8d, 8e, 8h and 8i.