For 10 points, name this reaction which yields a cyclohexene product, a certain 4+2 cycloaddition named for its German discoverers.
Chiral oxazaboroladine [ox-AY-zuh-bo-RO-lid-een] has been shown to improve both enantio and regioselectivity for this reaction. Imidazolinium salts catalyze it when an imine is substituted for one of the reactants, and when this reaction is under kinetic control, the (*) endo adduct is favored. As observed in this reaction and its aforementioned aza modification, it requires one of the reactants to be in the s-cis conformation and is driven by HOMO and LUMO overlap between the diene and dienophile respectively. For 10 points, name this reaction which yields a cyclohexene product, a certain 4+2 cycloaddition named for its German discoverers.
Chiral oxazaboroladine [ox-AY-zuh-bo-RO-lid-een] has been shown to improve both enantio and regioselectivity for this reaction.
{Diels-Alder} reaction