CONICET | Buscador de Institutos y Recursos Humanos

Copper nanoparticles (CuNPs) supported on ZnO have been shown to effectively catalyze the direct synthesis ofb-ketophosphonates from alkenes or alkynes, and that of vinyl phosphonates from alkynes and diethylphosphite, under air and in the absence of any additive or ligand. When using alkynes as starting materials, the selectivity proved to be dependent on the nature of the alkyne. Thus, alkynesconjugated with an aromatic ring or a carbon?carbon double bond gave b-ketophosphonates as the main reaction products, whereas aliphatic alkynes or alkynes conjugated with a carbonyl group led to the formation of the corresponding vinyl phosphonates.