Activation via trienamine intermediates is a synthetically useful protocol for
performing asymmetric Diels-Alder reactions controlled by a remote chiral
catalyst (a secondary or primary amine). Key features underpinning this
concept are the conformation towards the trienamine formation and also
the use of highly electrophilic dienophiles. This cycloaddition reaction allows
the application of asymmetric organocatalysis at a remote position, and the
synthesis of complex molecules short synthetic sequences is possible.