Journal
ORGANIC LETTERS
Volume 20, Issue 12, Pages 3622-3626Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b01400
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Funding
- China Scholarship Council
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An unprecedented N-heterocyclic carbene-catalyzed annulation of isatin-derived enals and o-hydroxyphenyl-substituted p-quinone methides as bifunctional reagents has been discovered. The new protocol involves a 1,6-addition of the homoenolate equivalent intermediates to the hydroxy donor-1,6-Michael acceptors and leads to spirocyclic oxindole-epsilon-lactones in high yields and very good stereoselectivities.
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