Pincer-type bis(carbene)-derived complexes of nickel(II): Synthesis, structure, and catalytic activity

Nickel N-heterocyclic carbene complexes and their utility in homogeneous catalysis

“…In the first approach, the transmetallation method (Scheme 13) was successfully employed for preparing several complexes like (729−732), [230] (733−734), [231] (735), [194] (740), [203] (741), [211] (742) [232] and (743−754) [233] In the second approach, the direct method (Scheme 14) yielded the following complexes (736−737), [194] (756), [234] (757−760), [235] (761) [236] and (768−769) [217] from the reactions of the free or the in situ generated NHC ligands with the Ni(II) precursors namely, Ni(OAc) 2 , (DME)NiX 2 , (X = Cl, Br) NiBr 2 and NiCl 2 (PMe 3 ) 2 .…”

“…The compounds (187−188), [83] (216), [108] (256), [93] (264), [108] (684−685), [207] (717), [219] (729−732), [230] (756) [234,249] and (776−777) [238] have been reported for the Suzuki coupling of aryl bromide and chloride substrates. The complex (721) [222] is versatile for the Suzuki coupling towards all of the aryl chloride, bromide and iodide substrates.…”

“…The complex (721) [222] is versatile for the Suzuki coupling towards all of the aryl chloride, bromide and iodide substrates. [93] (392), [61] (403), [143] (453−454), [107] (458), [143] (756) [230] and (775) [238] have been reported for the Suzuki coupling of aryl bromide substrates.…”

Suzuki-Miyaura Cross-coupling Reaction Catalyzed by Nickel Nanoparticles Supported on Poly(N-vinyl-2-pyrrolidone)/TiO2-ZrO2Composite

“…Table 10 shows the comparison between the catalyst used in the present study and other Ni catalysts reported in the literature for SM reaction. [18][19][20][21][22][23] As can be seen, Ni-PVP/TiO 2 -ZrO 2 catalyst shows good activity and reasonable yield for SM reaction of aryl halides and phenylboronic acid in a Scheme 2. Proposed mechanism for Suzuki-Miyaura crosscoupling reaction catalyzed by Ni-PVP/TiO2-ZrO2.…”

Nickel‐Catalyzed Cross‐Coupling with Pincer Ligands

“…For the activated substrates, the reactions resulted in good to excellent yields, while for the deactivated substrates lower yields were obtained. [49] The catalytic activity was improved by employing the modified complex 51 as a catalyst (Scheme 17), which catalyzes the coupling of aryl and heteroaryl halides efficiently: 2 mol-% of 51, with 10 mol-% PPh 3 as an additive, lead to cross-coupling products in excellent yields (Table 11). [40] Scheme 17.…”