A Chiral Base Desymmetrisation-Ring-Closing Metathesis Route to Chiral Azaspirocycles: Synthesis of Core Structures Related to Pinnaic Acid and Halichlorine

Abstract A range of highly functionalised chiral azaspirocycles was synthesised, starting from a piperidine diester that is available in 90% ee from a chiral base desymmetrisation. The approach depends upon the use of Grignard addition reactions or a Claisen rearrangement to provide intermediates ca...

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Published in:Synlett 2004-11, Vol.2004 (13), p.2295-2298
Main Authors: Huxford, Timothy, Simpkins, Nigel S.
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Simpkins, Nigel S.
description Abstract A range of highly functionalised chiral azaspirocycles was synthesised, starting from a piperidine diester that is available in 90% ee from a chiral base desymmetrisation. The approach depends upon the use of Grignard addition reactions or a Claisen rearrangement to provide intermediates capable of undergoing ring-closing metathesis. A number of intermediates related to the core structure of pinnaic acid were synthesised by concise routes using the approach.
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title A Chiral Base Desymmetrisation-Ring-Closing Metathesis Route to Chiral Azaspirocycles: Synthesis of Core Structures Related to Pinnaic Acid and Halichlorine
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