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A solvent-free methodology that yields trans-4,5-diaminocyclopent-2-enones, main domains of natural products and a variety of N-heterocycles, is described. The bimetallic catalyst [Ni II  2 Dy III  2 L 4 (DMF) 6 ] 2(OTf) 2(DMF) (1) promotes the domino reaction of furfural and amines, with loadings as low as 0.01%, under stirring or microwave-assisted conditions to afford the corresponding frameworks in very good to excellent yields. Crystallographic and theoretical studies shed light on the exclusive formation of the trans-diastereoisomers via a 4π-conrotatory electrocyclization process elucidating the key step in the catalytic process.

the journal of organic chemistry

Solvent-Free Synthesis and Key Intermediate Isolation in Ni<sub>2</sub>Dy<sub>2</sub> Catalyst Development in the Domino Ring-Opening Electrocyclization Reaction of Furfural and Amines

Solvent-Free Synthesis and Key Intermediate Isolation in Ni2Dy2 Catalyst Development in the Domino Ring-Opening Electrocyclization Reaction of Furfural and Amines

Solvent-Free Synthesis and Key Intermediate Isolation in Ni₂Dy₂ Catalyst Development in the Domino Ring-Opening Electrocyclization Reaction of Furfural and Amines