New Approaches for the Synthesis N-alkylated Benzo[b]thiophene Derivatives together with their Antiproliferative and Molecular Docking Studies


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Abstract

Background: 2-Amino thiophene derivatives are important compounds not only for their uses in many heterocyclic reactions but also due to their wide range of pharmaceutical and biological activities.

Objective: The aim of this work was to explore a number of new heterocyclic derivatives, studying their inhibitions toward cancer cell lines and studying their structure activity relation ship.

Methods: Alkylation of 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile was achieved through its reaction with chloroacetone and 2-bromo-1-(4-aryl)ethanone derivatives to give compounds 3 and 11a-c. The produced compoumds were subjected to further heterocylization reactions and cytotoxic evaluation against the three cancer cell lines MCF-7, NCI-H460 and SF-268, together with the normal cell line WI 38. Further evaluations were obtained through studying their inhibitions against cancer cell lines classified according to the disease. Anticancer screening against hepatocellular carcinoma HepG2 and cervical carcinoma HeLa cell lines for all compounds together with the molecular docking of 12c, 12d, 12e and 12f were studied.

Results: Anti-proliferative evaluations and inhibitions for all of the synthesized compounds showed that many compounds exhibited high inhibitions.

Conclusion: Toward the three cancer cell lines, compounds 3, 5a, 7a, 9a, 9b, 11b, 12b, 12d, 12e, 12f, 14c, 14e, 14f, 15e, 15f, 16e, 16f, 17c, 18b, 22a and 22c were the most cytotoxic compounds. The high activities of some compounds were attributed to the presence of the electronegative CN and or Cl groups within the molecule. Most of the tested compounds exhibited inhibitions higher than the reference doxorubicin toward hepatocellular carcinoma HepG2 and cervical carcinoma HeLa cell lines. The score of binding energy of compounds 12c, 12d, 12e and 12f was close to the reference Foretinib which appeared through the molecular docking results of such compounds.

About the authors

Karam El-Sharkawy

Pharmaceutical Chemistry Department, Pharmacy College, Jazan University

Email: info@benthamscience.net

Abeer Mohamed

Department of Chemistry,, Egyptian Drug Authority (EDA) 51 Wezaret El-Zeraa St

Email: info@benthamscience.net

Fatma Al Farouk

Department of Chemistry, School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation

Email: info@benthamscience.net

Rafat Mohareb

Department of Chemistry, Faculty of Science,, Cairo University

Author for correspondence.
Email: info@benthamscience.net

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