Imidazole-aryl coupling reaction via C H bond activation catalyzed by palladium supported on modified magnetic reduced graphene oxide in alkaline deep eutectic solvent

PdII Dispersed on Magnetic Partially Reduced GO/OMWCNT Non‐Covalently Modified with a Vic‐Dioxime: An Efficient and Magnetically Retrievable Catalyst for Suzuki‐Miyaura Coupling Reaction

“…In this paper, by considering the electron‐donating and coordination properties of vic‐dioxime to metal species and regarding to our previous studies on advantage of synthesis of magnetic nanoparticle supported(MNP‐supported) catalysts in easy separation with an external magnet, [26] we herein reported the synthesis of active palladium(II) over 1,10‐phenanthroline‐5,6‐dioxime (phendioxime) functionalized magnetic partially reduce (graphene oxide/oxidized multiwalled carbon Nanotube) (MPR(GO‐OMWCNT)/PDO/Pd II ). The as‐prepared catalyst exhibited superior catalytic activity, stability and reusability toward the Suzuki‐Miyaura cross‐coupling reaction.…”

Graphene‐Supported, Well‐Defined Metal‐Based Catalysts for C−H Bond Functionalization and Related Reactions

“…Very recently, Heydari developed a novel palladium complex covalently supported on magnetic reduced graphene oxide, denoted as MRGO@DAPÀ AOÀ Pd(II) (13, Scheme 10), [41] containing Fe 3 O 4 NPs. The catalytic activity of 13 was tested in the regioselective arylation of 1-methyl-1H-imidazole and 1,2-dimethyl-1H-imidazole with (hetero)aryl bromides (Scheme 10) employing a catalyst loading of 0.3 mol% in alkaline deep eutectic solvent (made of K 2 CO 3 and glycerol in 1:5 ratio).…”

“…It is worth noting that in most of those cases no significant changes were observed, demonstrating the stability of the graphene-modified solids during catalysis for different transformations and reaction conditions. Graphene oxide, in any of their variants (GO, rGO, TRGO, MRGO) was the support which remains unaltered in the case of catalysts 3, [29] 5, [32] 11 [39] and 13 [41] for cross-coupling reactions; 18 [48] for CÀ H bond oxidation, 19, [49] 21 [51] and 22 [52] for three-component reactions, 23 [53] for allylation reaction and 26-rGO [56] for carbene insertion into CÀ H bonds. There is only one exception, that of catalyst PdÀ DI@GO (12) [40] for which studies carried out by SEM demonstrated that the morphology of the GO changed during catalysis, affecting the agglomeration of the GO layers.…”

Pd based on 2‐Aminopyrimidine and 1H‐benzo[d]imidazol‐2‐amine functionalizedFe3O4 nanoparticles as novel recyclable magnetic nanocatalysts for Ullmann coupling reaction

“…[1,2] In other words, this reaction has attracted recently high interest from the industry and used by chemists to produce a C-C bond between two aromatic nuclei in the presence of copper powder as a Cheap and economical catalyst to prepare the corresponding symmetrical biaryl. [3,4] and nowadays N-, O-, S-, P-and C-aryl bonds formation are easily accessible through these processes in many bioactive organic compounds. [5] For first time, aryl iodides were used in coupling reactions that were broaded by copper at high temperature conditions.…”