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DOI: 10.1039/A900185I (Paper) Reference Section for: J. Chem. Soc., Perkin Trans. 1, 1999, 955-968

A synthesis of herboxidiene

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Paul R. Blakemore, Philip J. Kocieński, Andrew Morley and Kenneth Muir

Abstract

The natural herbicide herboxidiene was constructed from two key fragments using a modified Julia olefination based on the benzothiazolyl sulfone activator. Key steps in the synthesis of the C1–C10 oxane fragment were (a) a modified Julia olefination using a 1-phenyl-1H-tetrazolyl sulfone as activator and (b) an intramolecular addition of an alkoxide to an α,β-unsaturated ester. Key steps in the synthesis of the C11–C19 polyketide fragment were (a) a directed aldol reaction using a camphor-10,2-sultam as auxiliary; (b) an Ireland–Claisen rearrangement and (c) a hydroxy-directed epoxidation.

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