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Total synthesis and biological evaluation of halipeptins a and d and analogues

Academic Article
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Overview

authors

  • Nicolaou, K.C.
  • Lizos, D. E.
  • Kim, Dae Hee
  • Schlawe, D.
  • de Noronha, R. G.
  • Longbottom, D. A.
  • Rodriquez, M.
  • Bucci, M.
  • Cirino, G.

publication date

  • April 2006

journal

  • Journal of the American Chemical Society  Journal

abstract

  • The marine-derived halipeptins A (1a) and D (1d) and their analogues 3a, 3d and 4a, 4d were synthesized starting from building blocks 10, 13, 14a or 14d, 15, and 16. The first strategy for assembling the building blocks, involving a macrolactamization reaction to form the 16-membered ring hydroxy thioamide 52d as a precursor, furnished the epi-isoleucine analogue (4d) of halipeptin D, whereas a second approach involving thiazoline formation prior to macrolactamization led to a mixture of halipeptins A (1a) and D (1d) and their analogues 3a, 3d (epimers at the indicated site) and 4a, 4d (epimers at the indicated site). The same route starting with D-Ala resulted in the exclusive formation of the epimeric halipeptin D analogue 3d. The synthesized halipeptins, together with the previously constructed oxazoline analogues 5d and 6d, were subjected to biological evaluation revealing anti-inflammatory properties for 1a, 1d, and 6d while being noncytotoxic against human colon cancer cells (HCT-116).

subject areas

  • Anti-Infective Agents
  • Antineoplastic Agents
  • Cell Line, Tumor
  • Depsipeptides
  • Humans
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Identity

International Standard Serial Number (ISSN)

  • 0002-7863

Digital Object Identifier (DOI)

  • 10.1021/ja060064v

PubMed ID

  • 16569024
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Additional Document Info

start page

  • 4460

end page

  • 4470

volume

  • 128

issue

  • 13

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