Wu, Wenqin published the artcileIron-Catalyzed Cross-Coupling Reactions of Arylmagnesium Reagents with Aryl Chlorides and Tosylates: Influence of Ligand Structural Parameters and Identification of a General N-Heterocyclic Carbene Ligand, Application of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, the publication is Organometallics (2017), 36(12), 2293-2297, database is CAplus.
A systematic evaluation of N-heterocyclic carbene ligands in the Fe-catalyzed cross-coupling reactions of aryl chlorides and arylmagnesium reagents was performed. There is no clear correlation between the donor strength of the N-heterocyclic carbene and the reaction outcome. Instead, the highest yields of the desired biaryl product were obtained with sterically demanding ligands possessing large %Vbur values. Through this study, 1,3-bis[2,7-di(isopropyl)-1-naphthalenyl]-2-imidazolidinylidene (SIPrNap) was identified as an efficient and general ligand for the coupling of both aryl chlorides and tosylates.
Organometallics 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 C5H8N2O, Application of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem