Title:Discovery of the Aminated Quinoxalines as Potential Active Molecules
Volume: 21
Issue: 15
Author(s): Sedef Bener, Nilüfer Bayrak, Emel Mataracı-Kara, Mahmut Yıldız, Belgin Sever, Halilibrahim Çiftçi and Amaç Fatih Tuyun*
Affiliation:
- Department of Chemistry, Faculty of Science, Istanbul University, Fatih, 34126, İstanbul, Türkiye
Keywords:
Anticancer activity, antimicrobial activity, quinoxalines, leukemia, ADME, molecular docking.
Abstract:
Background: In recent years, as the biological activity of the quinoxaline skeleton has
been revealed in numerous studies, interest in synthesizing new prototype molecules for the treatment
of many chronic diseases, especially cancer, has increased.
Methods: The desired alkoxy substituted aminoquinoxalines (AQNX1-9) were synthesized by the
reaction of QNX and alkoxy substituted aryl amines such as 2-methoxyaniline, 4-methoxyaniline, 2-
ethoxyaniline, 3-ethoxyaniline, 4-ethoxyaniline, 4-butoxyaniline, 2,4-dimethoxyaniline, 3,4-
dimethoxyaniline, and 3,5-dimethoxyaniline according to the previously published procedure. QNX
was aminated in DMSO at 130°C. We synthesized various alkoxy substituted aminoquinoxaline
compounds (AQNX1-9) and evaluated their anticancer and antimicrobial activities in order to expand
the search to related structures. In particular, two aminoquinoxaline (AQNX5 and AQNX6)
compounds, coded as NSC D-835971/1 and NSC D-835972/1 by the National Cancer Institute in the
USA, were screened for anticancer screening at a dose of 10-5 M on a full panel of 60 human cell
lines obtained from nine human cancer cell types (leukemia, melanoma, non-small cell lung, colon,
central nervous system, ovarian, kidney, prostate, and breast cancer).
Results: Further in silico studies were also conducted for the compound AQNX5 (NSC D-
835971/1), which was found to be the most active antiproliferative agent, especially against leukemia
cell lines. Molecular docking studies showed that AQNX5 interacted with Glu286 and Lys271
through hydrogen bonding and π-stacking interaction in the ATP binding region of Abl kinase,
which is indicated as a potential target of leukemia. Besides, AQNX5 occupied the minor groove of
the double helix of DNA via π-stacking interaction with DG-6.
Conclusion: According to in silico pharmacokinetic determination, AQNX5 was endowed with
drug-like properties as a potential anticancer drug candidate for future experiments. In the light of
these findings, more research will focus on aminated quinoxalines' ability to precisely target leukemia
cancer cell lines.