Publication Cover
Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 50, 2020 - Issue 19
414
Views
17
CrossRef citations to date
0
Altmetric
Articles

Synthesis, EGFR-TK inhibition and anticancer activity of new quinoxaline derivatives

, , &
Pages 2924-2940 | Received 25 Mar 2020, Published online: 05 Jul 2020
 

Abstract

Ethyl 4-substituted-3-oxo-quinoxaline-2-carboxylates 3–5 were obtained via alkylation of ethyl 3-oxo-3,4-dihydroquinoxaline-2-carboxylate (1). Compound 1 was heterocyclized using hydrazines, ethylenediamine, and ethanolamine to give pyrazoloquinoxalines 6, 7, diazepinoquinoxaline 8, and oxazepinoquinoxaline 10. The quinoxaline-2-carboxamides 9, 11, 12 were prepared via condensation of compound 1 with different amines. Compound 1 was thiated using Lawesson’s reagent affording quinoxaline-3-thione 13, in fair yield. In addition, the reaction of 4-methyl-3-oxoquinoxaline 3 with some binucleophiles led to a series of new oxoquinoxaline derivatives 14–18. The molecular structure of compounds 1, 3, and 9 was confirmed by X-ray crystallography.

The anti-proliferative activity showed that among all the tested compounds, compounds 3, (IC50 2.51 ± 3.0, 4.22 ± 1.6 and 2.27 ± 1.9 µM), 11 (IC50 1.32 ± 2.61, 1.41 ± 1.23 and 1.18 ± 1.91 µM) and 17 (IC50 1.72 ± 1.32, 1.85 ± 0.94 and 1.92 ± 4.83 µM) showed noteworthy anti-proliferative effects against the three cancer cell lines, HCT116, HePG2 and MCF7, respectively, compared to the reference drugs doxorubicin (IC50 1.41 ± 0.58, 0.90 ± 0.62 and 1.01 ± 3.02 µM) and erlotinib (IC50 1.63 ± 0.81, 1.57 ± 0.62 and 1.49 ± 0.54 µM). Compounds 3 (0.899 nM), 11 (0.508 nM) and 17 (0.807) showed strong EGFR inhibitory activity compared to Erlotinib (0.439 nM) and these results are in agreement with the docking study. These results suggest that compounds could probably be promising anticancer agents with EGFR inhibitory activity.

Graphical Abstract

Acknowledgements

We are thankful to Sohag University and Faculty of Science in Egypt for the support of this work.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.