Synthesis 2009(17): 2954-2962  
DOI: 10.1055/s-0029-1216910
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Stereochemical Assignments of the Chlorinated Residues in Victorin C

Amanda C. Durow, Craig Butts, Christine L. Willis*
School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, UK
Fax: +44(117)0298611; e-Mail: chris.willis@bristol.ac.uk;
Further Information

Publication History

Received 30 May 2009
Publication Date:
23 July 2009 (online)

Abstract

Victorins are cyclic pentapeptide natural products isolated from the fungus Cochliobus victoriae. Using a combination of synthesis and spectroscopic methods we have assigned the geometry of the vinyl chloride residue and determined the stereochemistry of the 5,5-dichloroleucine moiety.

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The optical rotation has not been reported for 5,5-dichloroleucine isolated following degradation of the victorins,¹,² hence the absolute stereochemistry is assumed from the earlier reported ORD shifts of the 2,4-DNP derivatives.²