An Asymmetric Organocatalytic Quadruple Domino Reaction Employing a Vinylogous Friedel-Crafts/Michael/Michael/Aldol Condensation Sequence
Overview
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An organocatalytic quadruple cascade initiated by a Friedel-Crafts-type reaction is described. The ()-diphenylprolinol trimethylsilyl ether catalyzed reaction yields highly functionalized cyclohexenecarbaldehydes bearing a 1,1-bis[4-(dialkylamino)phenyl]ethene moiety and three contiguous stereogenic centers. The reaction tolerates various functional groups and all products are obtained with very good diastereoselectivity and with virtually complete enantiomeric excess.
New Developments of the Principle of Vinylogy as Applied to π-Extended Enolate-Type Donor Systems.
Curti C, Battistini L, Sartori A, Zanardi F Chem Rev. 2020; 120(5):2448-2612.
PMID: 32040305 PMC: 7993750. DOI: 10.1021/acs.chemrev.9b00481.