“…[6,7] ScA C H T U N G T R E N N U N G (OTf) 3 , which features such advantages as stability, recovery, and reusability, has shown highly catalytic activity in many transformations. [8] As excellent chiral scaffolds, N,N'-dioxides [9] were able to coordinate with ScA C H T U N G T R E N N U N G (OTf) 3 and exhibited great potential in various reactions such as allylation, [10a] aza-Diels-Alder reactions, [10b] Michael reactions, [10c] FriedelAbstract: Highly enantioselective Michael addition of 1,3-dicarbonyl compounds and nitromethane to 4-oxo-4-arylbutenoates catalyzed by N,N'-dioxide-ScA C H T U N G T R E N N U N G (OTf) 3 complexes has been developed. Using 0.5-2 mol % catalyst loading, various a-stereogenic esters were obtained regioselectively with excellent yields (up to 97 %) and enantioselectivities (up to > 99 % ee).…”