Enantioselective NHC-catalyzed redox [4+2]-hetero-Diels-Alder reactions using α,β-unsaturated trichloromethyl ketones as amide equivalents
Abstract
α,β-Unsaturated trichloromethyl ketones are suitable α,β-unsaturated amide and ester equivalents in N-heterocyclic carbene (NHC)-catalyzed redox hetero-Diels-Alder reactions with azolium enolates generated from α-aroyloxyaldehydes. The initially formed syn-dihydropyranone products can be isolated, or can undergo ring-opening with benzylamine followed by aminolysis of the resulting CCl3 ketone to form a range of diamides with high diastereo- and enantioselectivity (up to >95:5 dr and >99% ee).
Citation
Attaba , N , Taylor , J E , Slawin , A M Z & Smith , A D 2015 , ' Enantioselective NHC-catalyzed redox [4+2]-hetero-Diels-Alder reactions using α,β-unsaturated trichloromethyl ketones as amide equivalents ' , The Journal of Organic Chemistry , vol. 80 , no. 19 , pp. 9728–9739 . https://doi.org/10.1021/acs.joc.5b01820
Publication
The Journal of Organic Chemistry
Status
Peer reviewed
ISSN
0022-3263Type
Journal article
Description
The authors thank the Royal Society for a University Research Fellowship (A.D.S.) and the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013) ERC Grant Agreement No. 279850 (N.A. and J.E.T.).Collections
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