Enantioselective Diels–Alder reactions of 3-(acyloxy)acrylates

Diels-Alder reactions with 3-(acyloxy)acrylates using chiral Lewis acid catalysts have been successfully carried out. These reactions proceed with high enantioselectivity when a chiral Lewis acid derived from Cu(OTf)2 and a bisoxazoline is used. The facility of the reaction is dependent on the nature of the acyloxy group in the dienophile.