Synthesis and Catalytic Activity of a Pincer-Type Bis(imidazolin-2-ylidene) Nickel(II) Complex

Abstract

An air- and moisture-stable nickel(II) complex of bis-carbene pincer complex 2 has been synthesized, and its catalytic activity for the Heck reaction and the Suzuki coupling reaction was investigated.

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 .…”

“On-water” Hiyama coupling catalyzed by CNC pincer complexes of Pd(II)

“…The resulting residue was redissolved in CDCl 3 and the yield was calculated by 1 H-NMR using diethylene glycol dimethyl ether as internal standard. Following this procedure the following products were prepared: 1-Biphenyl-4-yl-ethanone (5ª) 13 (>99%, chromatographically pure, 99% isolated yield) 4-Methoxybiphenyl (5d) 13 (60%) 3-Methoxybiphenyl (5e) 14 (11%). 13 (6%) generous donation of hexane.…”

Nickel‐Catalyzed Cross‐Coupling with Pincer Ligands

“…Activated aryl chlorides afforded slightly lower yields with higher catalyst loading. [48] Further optimization of the reaction conditions led to a much shorter reaction time, and the scope of the electrophilic substrates was extended. [22] Scheme 16.…”