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Enantioselective N-heterocyclic carbene catalyzed formal [3+2] cycloaddition using α-aroyloxyaldehydes and oxaziridines

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Kerr_2017_Enantioselective_Tetrahedron_CC.pdf (1.574Mb)
Date
15/01/2017
Author
Kerr, Ryan W. F.
Greenhalgh, Mark D.
Slawin, Alexandra M. Z.
Arnold, Polly L.
Smith, Andrew David
Funder
EPSRC
The Royal Society
Grant ID
EP/L016419/1
WM140071
Keywords
QD Chemistry
DAS
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Abstract
An enantioselective N-heterocyclic carbene catalysed formal [3+2] cycloaddition has been developed for the synthesis of oxazolindin-4-one products. The reaction of oxaziridines and α-aroyloxyaldehydes under N-heterocyclic carbene catalysis provides the formal cycloaddition products with excellent control of the diastereo- and enantioselectivity (12 examples, up to >95:5 dr, >99:1 er). A matched-mismatched effect between the enantiomer of the catalyst and oxaziridine was identified, and preliminary mechanistic studies have allowed the proposal of a model to explain these observations.
Citation
Kerr , R W F , Greenhalgh , M D , Slawin , A M Z , Arnold , P L & Smith , A D 2017 , ' Enantioselective N-heterocyclic carbene catalyzed formal [3+2] cycloaddition using α-aroyloxyaldehydes and oxaziridines ' , Tetrahedron: Asymmetry , vol. 28 , no. 1 , pp. 125-134 . https://doi.org/10.1016/j.tetasy.2016.10.012
Publication
Tetrahedron: Asymmetry
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.tetasy.2016.10.012
ISSN
0957-4166
Type
Journal article
Rights
© 2017 The Authors. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Description
We thank the EPSRC Centre for Doctoral Training in Critical Resource Catalysis (CRITICAT, grant code EP/L016419/1) (R.W.F.K.) for funding. The European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013) ERC Grant Agreement No. 279850 is also acknowledged. A.D.S. thanks the Royal Society for a Wolfson Research Merit Award.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/10090

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