Design and synthesis of some new carboxamide and propanamide derivatives bearing phenylpyridazine as a core ring and the investigation of their inhibitory potential on in-vitro acetylcholinesterase and butyrylcholinesterase

Kılıç B., Gulcan H. O., Aksakal F., Ercetin T., Oruklu N., Bagriacik E. Ü., ...More

BIOORGANIC CHEMISTRY, vol.79, pp.235-249, 2018 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 79
  • Publication Date: 2018
  • Doi Number: 10.1016/j.bioorg.2018.05.006
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Index Chemicus (IC)
  • Page Numbers: pp.235-249
  • Keywords: Alzheimer's disease, Pyridazine, Acetylcholinesterase inhibitory activity, Butyrylcholinesteraseinhibitory activity, Molecular docking, ALZHEIMERS-DISEASE, 1(2H)-PHTHALAZINONE DERIVATIVES, ANTIMICROBIAL ACTIVITIES, E2020 ARICEPT(R), BINDING, SITE, 3(2H)-PYRIDAZINONE, CHOLINESTERASES, AGGREGATION, HYPOTHESIS
  • Gazi University Affiliated: Yes


A series of new carboxamide and propanamide derivatives bearing phenylpyridazine as a core ring were designed, synthesized and evaluated for their ability to inhibit both cholinesterase enzymes. In addition, a series of carboxamide and propanamide derivatives bearing biphenyl instead of phenylpyridazine were also synthesized to examine the inhibitory effect of pyridazine moiety on both cholinesterase enzymes. The inhibitory activity results revealed that compounds 5b, 5f, 5h, 5j, 5l pyridazine-3-carboxamide derivative, exhibited selective acetylcholinesterase (AChE) inhibition with IC50 values ranging from 0.11 to 2.69 mu M. Among them, compound 5h was the most active one (IC50 = 0.11 mu M) without cytotoxic effect at its effective concentration against AChE. Additionally, pyridazine-3-carboxamide derivative 5d (IC50 for AChE = 0.16 mu M and IC50 for BChE = 9.80 mu M) and biphenyl-4-carboxamide derivative 6d (IC50 for AChE = 0.59 mu M and IC50 for BChE = 1.48 mu M) displayed dual cholinesterase inhibitory activity. Besides, active compounds were also tested for their ability to inhibit A beta aggregation. Theoretical physicochemical properties of the compounds were calculated by using Molinspiration Program as well. The Lineweaver-Burk plot and docking study showed that compound 5 h targeted both the catalytic active site (CAS) and the peripheral anionic site (PAS) of AChE.