Clavier, Herve published the artcileNew bidentate alkoxy-NHC ligands for enantioselective copper-catalyzed conjugate addition, SDS of cas: 14284-06-1, the publication is Tetrahedron: Asymmetry (2005), 16(5), 921-924, database is CAplus.
Chiral alkoxy-imidazolinium salts are easily available via a five-step procedure starting from β-amino alcs. This new family of alkoxy-N-heterocyclic carbene (NHC) precursors is shown to be highly active in the enantioselective copper-catalyzed conjugate addition to cyclic enones. Complete conversion with low catalyst loading and good enantiomeric excesses up to 93% were obtained at room temperature A ligand thus prepared and optimized was a (2S)-2-amino-4-methyl-1-pentanol derivative (I).
Tetrahedron: Asymmetry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, SDS of cas: 14284-06-1.
Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”