Synthesis, molecular docking, acetylcholinesterase and butyrylcholinesterase inhibitory potential of thiazole analogs as new inhibitors for Alzheimer disease

A series of thirty (30) thiazole analogs were prepared, characterized by H-1 NMR, C-13 NMR and EI-MS and evaluated for Acetylcholinesterase and butyrylcholinesterase inhibitory potential. All analogs exhibited varied butyrylcholinesterase inhibitory activity with IC50 value ranging between 1.59 +/- 0.01 and 389.25 +/- 1.75 mu M when compared with the standard eserine (IC50, 0.85 +/- 0.0001 mu M). Analogs 15, 7, 12, 9, 14, 1, 30 with IC50 values 1.59 +/- 0.01, 1.77 +/- 0.01, 6.21 +/- 0.01, 7.56 +/- 0.01, 8.46 +/- 0.01, 14.81 +/- 0.32 and 16.54 +/- 0.21 mu M respectively showed excellent inhibitory potential. Seven analogs 15, 20, 19, 24, 28, 30 and 25 exhibited good acetylcholinesterase inhibitory potential with IC50 values 21.3 +/- 0.50, 35.3 +/- 0.64, 36.6 +/- 0.70, 44.81 +/- 0.81, 46.36 +/- 0.84, 48.2 +/- 0.06 and 48.72 +/- 0.91 mu M respectively. All other analogs also exhibited well to moderate enzyme inhibition. The binding mode of these compounds was confirmed through molecular docking. (C) 2015 Elsevier Inc. All rights reserved.