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Amino Acids

pp 1–11 | Cite as

Synthesis, protonation constants and biological activity determination of amino acid–salicylaldehyde-derived Schiff bases

  • Claudia FattuoniEmail author
  • Sarah Vascellari
  • Tiziana PivettaEmail author
Original Article
  • 36 Downloads

Abstract

Schiff bases represent a class of molecules widely studied for their importance in organic and coordination chemistry. Despite the large amount of studies on the chemical and biological properties of the Schiff bases, the different experimental conditions prevent a useful comparison to search for a correlation structure–activity. Moreover, literature is lacking in comprehensive data on the spectroscopic characterization of these compounds. For this reason, six Schiff bases, derived from salicylaldehyde and natural amino acids were fully characterized by nuclear magnetic resonance and infrared spectroscopy, and their aqueous solution equilibria, antiproliferative activity and DNA-binding activity were examined. All experimental conditions were kept constants to achieve comparable information and useful insights about their structure–activity correlation. The synthesized compounds showed DNA binding constants in the 101–102 M−1 range, depending on the substituent present in the amino acid side-chain, and resulted devoid of significant cytotoxic activity against the different human tumor cell lines showing IC50 values higher than 100 µM.

Keywords

Schiff bases l-Amino acids DNA binding Cytotoxicity Aqueous solution equilibria 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare no conflicts of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

726_2019_2816_MOESM1_ESM.docx (5.5 mb)
Supplementary file1 (DOCX 5676 kb)

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2020

Authors and Affiliations

  1. 1.Department of Chemical and Geological SciencesUniversity of Cagliari, Cittadella UniversitariaCagliariItaly
  2. 2.Department of Biomedical SciencesUniversity of Cagliari, Cittadella UniversitariaCagliariItaly

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