Huang, Jian-Qiang published the artcile[(NHC)NiIIH]-Catalyzed Cross-Hydroalkenylation of Cyclopropenes with Alkynes: Cyclopentadiene Synthesis by [(NHC)NiII]-Assisted C-C Rearrangement, Quality Control of 258278-25-0, the publication is Angewandte Chemie, International Edition (2019), 58(17), 5702-5706, database is CAplus and MEDLINE.
The cross-hydroalkenylation/rearrangement cascade (HARC), using a cyclopropene, e.g., 3′,4′-dihydrospiro[2-cyclopropene-1,1′(2’H)-naphthalene] and alkyne RCCR1 (R = H, CH3, C2H5, (CH2)2CH3, OC2H5; R1 = CH2OCH3, CH2OC6H5, cyclohexyl, etc.) as substrate pairs was achieved for the first time by using new [(NHC)Ni(allyl)]BArF (Ar = mesityl, diisopropylphenyl, 3-pentyl) catalysts (NHCN-heterocyclic carbenes). By controlling the (NHC)NiIIH relative insertion reactivity with cyclopropene and alkyne, a broad scope of cyclopentadienes, e.g., I was obtained with high selectivity. The structural features of new (NHC)NiII catalyst were important for the success of the reaction. The mild reaction conditions employed may serve as an entry for exploring (NHC)NiII-assisted vinylcyclopropane rearrangement reactivity.
Angewandte Chemie, International Edition 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