2H-Indazolo[2,1-b]phthalazine-trione derivatives: Inhibition on some metabolic enzymes and molecular docking studies

Creative Commons License

Taslimi P., Türkan F., Karaman H. S., Turhan K., Turgut Z., Gülçin İ.

Journal Of Heterocyclic Chemistry, vol.57, no.5, pp.3116-3125, 2020 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 57 Issue: 5
  • Publication Date: 2020
  • Doi Number: 10.1002/jhet.4019
  • Journal Name: Journal Of Heterocyclic Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), Chimica, EMBASE
  • Page Numbers: pp.3116-3125
  • Yıldız Technical University Affiliated: Yes


In this study, substituted 2H‐indazolo[2,1‐]phthalazine‐1,6,11‐trione compounds (4a–d ) obtained via one‐pot three‐component condensation reaction of aromatic aldehydes, cyclic 1,3‐dione, and phthalhydrazide in ethanol catalyzed by Y(OTf)3 showed satisfactory inhibitory effects against some important enzymes. Also, these molecules had Ki values in the row of 185.92 ± 36.03‐294.82 ± 50.76 nM vs carbonic anhydrase I (CA I), 204.93 ± 46.90‐374.10 ± 83.63 nM against human CA II, 937.16 ± 205.82‐1021.83 ± 193.66 nM against α‐glycosidase (α‐Gly), respectively. For cholinesterase enzymes, the Ki values were found in the range of 47.26 ± 9.62‐72.05 ± 19.47 nM against acetylcholinesterase (AChE) and 65.03 ± 9.88‐102.83 ± 25.04 nM against butyrylcholinesterase (BChE), respectively. The inhibition effects of these compounds against enzymes whose name are AChE, BChE, α‐Gly, hCA I, and hCA II, were compared with control molecules like tacrine, acarbose, and acetazolamide.