Asymmetric Organocatalytic Vinylogous Michael Addition Triggered Triple-Cascade Reactions Of 2-Hydroxycinnamaldehydes And Vinylogous Nucleophiles: Construction Of Benzofused Oxabicyclo[3.3.1]Nonane Scaffolds

CHEMICAL COMMUNICATIONS(2021)

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摘要
An organocatalytic vinylogous Michael addition triggered triple-cascade reaction has been developed. 2-Hydroxycinnamaldehydes worked under iminium activation with either acyclic or cyclic ketone-derived alpha,alpha-dicyanoalkenes, yielding the benzofused oxabicyclo[3.3.1]nonanes bearing one quaternary stereocenter with excellent stereoselectivities.
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Asymmetric Synthesis
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