Organopalladium Complexes of Oxacalixarenes: Selecting the Lid for the Three-Dimensional Scaffold

The first organometallic (palladium) complexes of oxacalixarene molecules were prepared via oxidative addition of the C–I bond at the lower rim. The unique geometry of the oxacalixarene scaffold allowed for the selective introduction of new ligands at the top of the calixarene scaffold. Such coordination can be used to coordinatively link the opposing aromatic rings.