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Current Organic Synthesis

Editor-in-Chief

ISSN (Print): 1570-1794
ISSN (Online): 1875-6271

General Research Article

Synthesis of New Cyclopeptide Analogues of the Miuraenamides

Author(s): Sarah Kappler, Andreas Siebert and Uli Kazmaier*

Volume 18 , Issue 4 , 2021

Published on: 13 January, 2021

Page: [418 - 424] Pages: 7

DOI: 10.2174/1570179418666210113161550

Price: $65

Abstract

Introduction: Miuraenamides belong to natural marine compounds with interesting biological properties.

Materials and Methods: Miuraenamides initiate polymerization of monomeric actin and therefore show high cytotoxicity by influencing the cytoskeleton. New derivatives of the miuraenamides have been synthesized containing an N-methylated amide bond instead of the more easily hydrolysable ester in the natural products.

Results: Incorporation of an aromatic side chain onto the C-terminal amino acid of the tripeptide fragment also led to highly active new miuraenamides.

Conclusion: In this study, we showed that the ester bond of the natural product miuraenamide can be replaced by an N-methyl amide. The yields in the cyclization step were high and generally much better than with the corresponding esters. On the other hand, the biological activity of the new amide analogs was lower compared to the natural products, but the activity could significantly be increased by incorporation of a p-nitrophenyl group at the C-terminus of the peptide fragment.

Keywords: Actin, cyclodepsipeptides, cyclopeptides, cytoskeleton, cytotoxic compounds, myxobacteria, natural products.

Graphical Abstract

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