Synthesis 2006(13): 2173-2182  
DOI: 10.1055/s-2006-942426
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of (2S,3R,4S)-Isonorstatine Using a Solvent-Induced Highly Stereoselective 3-Butenyl Addition to l-Threose Imines

Feng Li, Oliver Schwardt, Volker Jäger*
University of Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569 Stuttgart, Germany
Fax: +49(711)68564321; e-Mail: jager.ioc@oc.uni-stuttgart.de;
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Publikationsverlauf

Received 29 May 2006
Publikationsdatum:
12. Juni 2006 (online)

Abstract

Isonorstatine was obtained in an 11-step sequence starting from l-tartaric acid, based on a highly stereoselective addition of 1-butene-3-yl to a threose imine. The orientation of the methyl group at C-4 of isonorstatine was determined by transformation of the key δ-xylo adduct into a δ-lactone. This also shows that both termini of the key adduct, the diol acetonide and vinyl moiety, can be elaborated selectively into an acid function leading to both aminohydroxymethyl acid and diacid derivatives.