Beillard, Audrey published the artcileCu(0), O2 and mechanical forces: a saving combination for efficient production of Cu-NHC complexes, Quality Control of 258278-25-0, the publication is Chemical Science (2017), 8(2), 1086-1089, database is CAplus and MEDLINE.
Mech. forces induced by ball-milling agitation enabled the highly efficient and widely applicable synthesis of Cu-carbene complexes from N,N-diaryl-imidazolium salts and metallic Cu. The required amount of gaseous dioxygen and insoluble Cu could be reduced down to stoichiometric quantities, while reaction rates clearly outperformed those obtained in solution Use of Cu(0) as the Cu source enabled the application of this approach to a wide array of N,N-diaryl-imidazolium salts (Cl–, BF4– and PF6–) that transferred their counteranion directly to the organometallic complexes. Cu-NHC complexes could be produced in excellent yields, including use of highly challenging substrates. Five unprecedented organometallic complexes are reported.
Chemical Science published new progress about 258278-25-0. 258278-25-0 belongs to imidazoles-derivatives, auxiliary class Achiral NHCs Ligands, name is 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, and the molecular formula is C27H39ClN2, Quality Control of 258278-25-0.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem