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Medicinal Chemistry Research

, Volume 27, Issue 1, pp 23–36 | Cite as

Enriching biologically relevant chemical space around 2-aminothiazole template for anticancer drug development

  • Sarah Titus
  • Kumaran G. SreejalekshmiEmail author
Original Research

Abstract

Combinatorial library based on a biologically relevant core template, 2-aminothiazole, with immense scope of diversity multiplication was designed for anticancer therapeutics. The diversity elements were incorporated through azomethine linkage on C4 hydrazine terminus in 5-benzoyl-2-arylamino-1,3-thiazole using isopropyl, isobutyl, cyclohexyl, and benzyl fragments and enrichment of chemical space therein was evaluated. Molecular docking of an in-house 200-member virtual library in anticancer target proteins- estrogen receptor (3ERT), cyclin dependent kinase (3FDN), and Aurora kinase (3LAU), identified selective binding of the compounds as ATP competitive inhibitors of 3LAU. The synthetic access to the compounds was realized through a facile and economically viable [4 + 1] ring synthesis strategy employing commercially available reagents. The in vitro cytotoxicity of selected members against human cancer cell lines indicated the potential of the designed scaffold in anticancer drug discovery, where compounds 2b, 3b, and 4b were found to be active against MCF-7 and A549 cell lines in less than ten micro molar concentrations. Moreover the predicted physicochemical properties pointed to the drug appropriateness for most of these molecules, that they obey the rule of five (RO5). Thus we present 2-alkyl/arylamino-4-alkylidene/arylidenehydrazino-5-benzoyl-1,3-thiazoles as a prospective and expandable skeleton for diversity oriented synthesis and in the discovery of selective Aurora kinase inhibitors.

Keywords

Chemical space 2-Aminothiazole HAT VCHATL Anticancer activity Molecular docking 

Notes

Acknowledgements

ST acknowledges IIST for financial support. Thanks are due to NIIST-TVM, IISER-TVM for support in NMR recording and ACTREC Mumbai for in vitro anticancer screening.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

44_2017_2039_MOESM1_ESM.docx (4.7 mb)
Supplementary Information

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of ChemistryIndian Institute of Space Science and TechnologyThiruvananthapuramIndia

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