《[(NHC)NiIIH]-Catalyzed Cross-Hydroalkenylation of Cyclopropenes with Alkynes: Cyclopentadiene Synthesis by [(NHC)NiII]-Assisted C-C Rearrangement》 was published in Angewandte Chemie, International Edition in 2019. These research results belong to Huang, Jian-Qiang; Ho, Chun-Yu. Recommanded Product: 258278-25-0 The article mentions the following:
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. The experimental part of the paper was very detailed, including the reaction process of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 258278-25-0Recommanded Product: 258278-25-0)
1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 258278-25-0) may be used as a precursor to the free carbene 1,3-bis(2,6-diisopropylphenyl)-2-imidazolidinylidene, and also used as an in situ formed catalyst in a variety of reactions, e.g. amination, Heck coupling reaction, the ring-opening metathesis polymerization (ROMP), hydrogenation.Recommanded Product: 258278-25-0In addition, it can efficiently catalyze the Suzuki-Miyaura coupling of aryl chlorides with aryl boronic acids.
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem