ChemInform Abstract: Enantioselective NHC-Catalyzed Redox [4 + 2]-Hetero-Diels-Alder Reactions Using α,β-Unsaturated Trichloromethyl Ketones as Amide Equivalents.

Hetero-Diels-Alder reactions of trichloromethyl α-enones as unsaturated amide and ester equivalents with azolium enolates, generated from α-aroyloxy aldehydes yield syn-dihydropyranones, which are isolated or transformed into diamides diastereo- and enantioselectively by in situ ring-opening with amines and subsequent aminolysis. [ABSTRACT FROM AUTHOR]