(NHC-olefin)-nickel(0) nanoparticles as catalysts for the ( Z )-selective semi-hydrogenation of alkynes and ynamides.
Marta G AvelloStéphane GollingLai Truong-PhuocLoïc VidalThierry RomeroVasiliki PapaefthimiouNathalie GruberMichael J ChetcutiFrédéric R LerouxMorgan DonnardVincent RitlengCuong Pham-HuuChristophe MichonPublished in: Chemical communications (Cambridge, England) (2023)
Nickel(0) nanoparticles coordinated to NHC ligands bearing N-coordinated cinnamyl moieties were readily prepared by reduction of a [NiCpBr(NHC-cinnamyl)] complex with methyl magnesium bromide. The combination of a strong σ-donor NHC ligand with a π-coordinating appended cinnamyl moiety likely prevents nickel(0) nanoparticle aggregation to larger inactive species, and allows the effective and ( Z )-selective semi-hydrogenation of alkynes and ynamides .