Synthesis 2008(14): 2278-2282  
DOI: 10.1055/s-2008-1067142
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Asymmetric Synthesis of Jaspine B (Pachastrissamine) via an Organocatalytic Aldol Reaction as Key Step

Dieter Enders*, Violeta Terteryan, Jiří Paleček
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
Fax: +49(241)8092127; e-Mail: enders@rwth-aachen.de;
Further Information

Publication History

Received 26 March 2008
Publication Date:
18 June 2008 (online)

Abstract

The asymmetric synthesis of jaspine B (pachastrissamine) using a (R)-proline-catalyzed enantioselective aldol reaction as key step is described. Jaspine B was synthesized from the commercially available and inexpensive 1-pentadecanal and the dihydroxyacetone equivalent 2,2-dimethyl-1,3-dioxan-5-one in nine steps, good overall yield (23.6%) and excellent stereoselectivity (de >98%, ee = 95%).