Beilstein J. Org. Chem.2013,9, 2564–2569, doi:10.3762/bjoc.9.291
Volker M. Schmiedel Stefano Stefani Hans-Ulrich Reissig Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany 10.3762/bjoc.9.291 Abstract Herein we present the synthesis of the anhydrophytosphingosine jaspineB and three of its stereoisomers using a
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Keywords: chiral auxiliaries; gold catalysis; jaspineB; lithiated alkoxyallenes; natural product synthesis; pachastrissamine; tetrahydrofurans; Introduction
JaspineB, also known as pachastrissamine (1, Scheme 1), is an anhydrophytosphingosine derivative, isolated 2002 from the marine sponge Pachastrissa
sp. by Higa et al. [1]. In 2003 Debitus et al. were able to extract this natural product from the marine sponge Jaspis sp. [2]. JaspineB (1) comprises a densely functionalized tetrahydrofuran ring, bearing three contiguous (2S,3S,4S)-configured stereogenic centers with a long alkyl chain at C-2 and
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Graphical Abstract
Scheme 1:
Structure of jaspine B 1 and its stereoisomers 2–4.