Tandem DielsrAlder cycloadditions efficiently construct multiple carbonrcarbon bonds while generating complex polycyclic structures in a single chemical step. 1 For example, the “pincer” DielsrAlder served as a cornerstone in Paquette's classic synthesis of dodecahedrane. 2 However, the synthetic utility of the “pincer” DielsrAlder reaction remains underutilized in organic synthesis. We considered that the “pincer” cycloaddition with ...