Synthesis 2007(15): 2291-2296  
DOI: 10.1055/s-2007-983776
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of the C1-C15 Fragment of Apicularen A through a Regioselective Electron-Transfer-Initiated Cyclization Reaction

Alexander J. Poniatowski, Paul E. Floreancig*
Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
e-Mail: florean@pitt.edu;
Further Information

Publication History

Received 8 March 2007
Publication Date:
12 July 2007 (online)

Abstract

In this paper we report the preparation of the benzyltetrahydropyran fragment of the vacuolar ATPase inhibitor apicularen A through an oxidative cyclization protocol. In this reaction regio­selective cleavage of one homobenzylic ether in the presence of another homobenzylic ether is achieved by selectively weakening one carbon-carbon σ-bond through substitution. This work demonstrates that oxidative fragmentation reactions can be used to generate stable cations selectively, even in the presence of other readily oxidized groups, provided that bond cleavage is sufficiently rapid following oxidation.