Fujita and coworkers discovered a self-assemble ML (6 palladium ions and 4 ligands in each complex) supramolecular container that could be enhanced into a chiral supramolecule by an addition of peripheral chiral auxiliary. In this case, the auxiliary diethyldiaminocyclohexane does not directly activate the catalytic site but induces a slight deformation of  the triazine plane to create chiral cavity inside the container molecule. This container could then be used to asymmetrically catalyze a [2+2] photoaddition of maleimide and inert aromatic compound fluoranthene, which previously have not been shown to undergo thermal or photochemical pericyclic reaction. The catalyst yields an enantiomeric excess of 40%.