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RESEARCH ARTICLE
Contents Vol 63(3)

Asymmetric Synthesis of a Hydroxylated Nine-membered Lactone from Tartaric Acid using the Claisen Rearrangement

Leon S.-M. Wong A B , Kathleen A. Turner A , Jonathan M. White B , Andrew B. Holmes A B and John H. Ryan A C
+ Author Affiliations
- Author Affiliations

A CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic. 3169, Australia.

B School of Chemistry, Bio21 Institute, The University of Melbourne, 30 Flemington Road, Parkville, Vic. 3010, Australia.

C Corresponding author. Email: jack.ryan@csiro.au

Australian Journal of Chemistry 63(3) 529-532 https://doi.org/10.1071/CH09637
Submitted: 8 December 2009  Accepted: 14 January 2010   Published: 26 March 2010

Abstract

The synthesis of a hydroxylated vinyl-appended lactone, in five synthetic steps from tartaric acid, is reported. The C2-symmetrical bis-vinyl diol 12 was converted into the ketene acetal 14 via methylenation of the cyclic carbonate 13 or thermal elimination of benzeneselenenic acid from the selenoxide 17. In both cases, the in situ generated ketene acetal 14 underwent spontaneous Claisen rearrangement to give the nine-membered lactone (+)-15. Lactones of this type are potentially advanced precursors to simplified eleutherobin analogues or other medium-ring lactone natural products.


Acknowledgements

The authors thank CSIRO (Australia), the Australian Research Council and the Victorian Endowment for Science, Knowledge and Innovation (VESKI) for financial support. We also thank Dr Roger Mulder and Dr Jo Cosgriff for assistance with collection of NMR data and Dr Carl Braybrook for interpretation of MS data.


References


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