Cage‐to‐Cage Cascade Transformations

A series of Pd₂ L ₄‐type binuclear self‐assembled coordination cages ( 1 – 4 ), where L stands for a nonchelating bidentate ligand, were prepared. The strategies adopted for the synthesis of the cages were: combination of Pd^II with 1) a selected ligand or 2) subcomponents of the ligand. Highly efficient cage‐to‐cage transformation reactions are demonstrated by suitable covalent modification (from 1 to 2 or 3 or 4 ) or ligand‐exchange reactions (from 1 to 2 or 3 or 4 ; from 2 to 3 or 4 ). Thus, new cascade transformations (from 1 to 2 to 3 ; from 1 to 2 to 4 ) are achieved beautifully.