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Synthesis 2009(17): 2954-2962
DOI: 10.1055/s-0029-1216910
DOI: 10.1055/s-0029-1216910
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Stereochemical Assignments of the Chlorinated Residues in Victorin C
Further Information
Received
30 May 2009
Publication Date:
23 July 2009 (online)
Publication History
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.
Key words
amino acids - halogenation - natural products - spectroscopy - stereoselective synthesis
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References
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