Synthesis 2017; 49(01): 202-208
DOI: 10.1055/s-0035-1562381
paper
© Georg Thieme Verlag Stuttgart · New York

Hydroxyl-Assisted trans-Reduction of 1,3-Enynes: Application to the Formal Synthesis of (+)-Aspicilin

Sebastian Schaubach
a   Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim/Ruhr, Germany
,
Kenichi Michigami
a   Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim/Ruhr, Germany
b   Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan   eMail: fuerstner@kofo.mpg.de
,
Alois Fürstner*
a   Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim/Ruhr, Germany
› Institutsangaben
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Publikationsverlauf

Received: 21. Juni 2016

Accepted: 21. Juni 2016

Publikationsdatum:
04. Juli 2016 (online)


Dedicated to Prof. Dieter Enders on the occasion of his 70th birthday

Abstract

1,3-Enynes are hardly amenable to trans-hydrometalation reactions, because they tend to bind the standard ruthenium catalysts too tightly. However, catalysts comprising a [Cp*Ru–Cl] unit allow such compounds to be used, provided they contain an OH group next to the triple bond. This aspect is illustrated by a formal synthesis of the lichen-derived macrolide aspicilin. The required macrocyclic enyne precursor was formed by an efficient ring-closing alkyne metathesis reaction.

Supporting Information