Heteronuclear 3 d/DyIII Coordination Clusters as Catalysts in a Domino Reaction

Three isoskeletal tetranuclear coordination clusters with general formula [MII2DyIII2L4(EtOH)6](ClO4)2⋅2 EtOH, (M=Co, 1; M=Ni, 2) and [NiII2DyIII2L4Cl2(CH3CN)2]⋅2 CH3CN (3), have been synthesized and characterized. These air‐stable compounds, and in particular 3, display efficient homogeneous catalytic behavior in the room‐temperature synthesis of trans‐4,5‐diaminocyclopent‐2‐enones from 2‐furaldehyde and primary or secondary amines under a non‐inert atmosphere. Custom‐designed catalysts: Three air‐stable compounds formulated as [MII2DyIII2L4(EtOH)6](ClO4)2 2 EtOH, [M=Co (1) and Ni (2)] and [NiII2DyIII2L4Cl2(CH3CN)2] 2 CH3CN (3), have been characterized. Compound 3, in particular, displays for the first time efficient homogeneous catalytic behavior in the room‐temperature synthesis of trans‐4,5‐diaminocyclopent‐2‐enones from 2‐furaldehyde and primary or secondary amines under a non‐inert atmosphere.