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  2. Synthesis and antibacterial activities of marine natural product ianthelliformisamines and subereamine synthetic analogues

Synthesis and antibacterial activities of marine natural product ianthelliformisamines and subereamine synthetic analogues

  • Bioorg Med Chem Lett. 2021 May 1:39:127883. doi: 10.1016/j.bmcl.2021.127883.
Shivaji Narayan Khadake 1 Shaik Karamathulla 1 Tapan Kumar Jena 1 Mohan Monisha 2 Nikhil Kumar Tuti 2 Faiz Ahmed Khan 1 Roy Anindya 3
Affiliations

Affiliations

  • 1 Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502285, India.
  • 2 Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502285, India.
  • 3 Department of Biotechnology, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502285, India. Electronic address: anindya@bt.iith.ac.in.
Abstract

Marine sponges of the genusSuberea produce variety of brominated tyrosine Alkaloids which display diverse range of biological activities including antiproliferative, antimicrobial and antimalarial activities. In continuation of our search for biologically active Marine natural products for Antibacterial compounds, we report here the synthesis and evaluation of biological activity of panel of ianthelliformisamines and subereamine analogues using the literature known acid-amine coupling reaction. Several derivatives of Ianthelliformisamine were achieved by the coupling of Boc-protected polyamine chain with brominated aromatic acrylic acid derivatives by varying the bromine substituents on aromatic acid derivatives, amine spacer as well as geometry of the double bond, and then Boc-deprotection using TFA. Similarly, subereamine analogues were also synthesized employing coupling reaction between various brominated phenyl acrylic acids with commercially available chiral amino ester derivatives followed by ester hydrolysis. We screened these synthetic analogues for Antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) strains. One of the compound 7c showed bactericidal activity against Staphylococcus aureus with an IC50 value of 3.8 μM (MIC = 25 μM).

Keywords

Bromotyrosine; Ianthelliformisamines; Marine sponges; Suberea; Subereamines.

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