1000012-24-7

Upstream product

• 2622-74-4 2-(4-bromophenyl)-1H-benzimidazole 
• 5720-05-8 4-methylphenylboronic acid 
• 4294-57-9 para-methylphenylmagnesium bromide 
• 393870-04-7 (4'-methyl[1,1'-biphenyl]-4-yl)boronic acid 
• 4857-06-1 2-chloro-1H-benzoimidazole 
• 873-75-6 4-bromobenzenemethanol 
• 95-54-5 1,2-diamino-benzene 
• 79757-92-9 (4'-methyl-[1,1'-biphenyl]-4-yl)methanol 
• 106-38-7 para-bromotoluene 
• 59016-93-2 p-hydroxymethylphenylboronic acid 

Relevant academic research and scientific papers

Formation of homoleptic tetracarbene versus m-Chelating dicarbene complexes of nickel(ii) and applications in kumada-Corriu couplings

The formation of mono- versus bis(chelate) Ni11 complexes bearing N-heterocyclic dicarbene ligands can be controlled by the flexibility of the ligand bridge. A short methylene spacer exclusively gives rise to a dicationic bis(chelate) complex [Ni(MeCCmeth)2]Br2 (1), whereas a more flexible propylene spacer affords a neutral monochelate complex [NiBr2(MeCCprop)] (2). Complex 2 was found to autoionize very slowly to the corresponding dicationic bis(chelate) over ca. 45 d in [D6]dmso. The formation of the bis-versus mono-chelate complex can be attributed to the different stabilities of the resulting metallacycles. The catalytic activity of mono-chelate 2 was tested in the Kumada-Corriu coupling of aryl halides with arylmagnesium reagents at ambient temperature. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009.

Synthesis of cis - and trans-diisothiocyanato-bis(NHC) complexes of nickel(II) and applications in the Kumada-Corriu reaction

Metathetical reaction of AgSCN with a series of trans-dihalido-bis(carbene) nickel(II) complexes in CH3CN readily afforded the novel diisothiocyanato-bis(carbene) complexes [Ni(NCS)2(NHC)2] (trans-2a, NHC = 1,3-diisopropylbenzimidazolin-2-ylidene; trans-2b, NHC = 1,3-diisobutylbenzimidazolin-2-ylidene; trans-2c, NHC = 1,3- dibenzylbenzimidazolin-2-ylidene; cis-2d, NHC = 1,3-di(2-propenyl) benzimidazolin-2-ylidene; cis-2e, NHC = 1-propyl-3-methylbenzimidazolin-2- ylidene) as greenish-yellow powders in moderate to good yields. While dihalido-bis(carbene) Ni(II) complexes exclusively form trans-complexes, a trans-cis isomerization occurs upon halido-isothiocyanato exchange with complexes bearing less bulky carbene ligands, i.e., cis-2d/e. DFT calculations indicated that this isomerization can be attributed to a reduced energy difference between trans- and cis-isomers of diisothiocyanato complexes. All complexes have been characterized by multinuclear NMR spectroscopy, ESI mass spectrometry, and X-ray diffraction analysis. A catalytic study revealed that cis-complexes generally exhibit greater activities in the Kumada-Corriu coupling reaction.

Small-molecular OLED electron transport material and preparation method and application thereof

The invention belongs to the technical field of organic electron transport materials, and relates to a small-molecular OLED electron transport material and a preparation method and an application thereof. Compounds of the small-molecular OLED electron transport material comprise an aromatic fused heterocycle and an aryl-substituted benzimidazole group which are connected with each other. The two kinds of groups not only enable the compounds to have good electron accepting capability, but also tend to planarity to be beneficial to molecular stacking, and are beneficial to combination of holes and electrons and exciton generation, so that the electron mobility of the material is improved, and the device efficiency is improved; meanwhile, the combination of the two enables carrier transmission to be balanced; when the small-molecular OLED electron transport material is applied to an organic light-emitting device and used as an electron transport layer, the device shows the advantages of low driving voltage and high light-emitting efficiency, and is superior to an existing common OLED device.

Ligand-Free Pd/C-Catalyzed One-Pot, Three-Component Synthesis of Aryl-Substituted Benzimidazoles by Hydrogen-Transfer and Suzuki Reactions in Water

An efficient protocol for the ligand-free and heterogeneous Pd/C-catalyzed one-pot, three-component synthesis of aryl-substituted benzimidazoles from benzyl alcohols by using water as the solvent was developed. The reaction involves hydrogen-transfer and Suzuki reactions. This method is quite convenient and environmentally friendly.

Synthesis of highly functionalized 2-(substituted biphenyl) benzimidzoles via Suzuki-Miyaura cross coupling reaction

(Chemical Equation Presented) A facile and convenient method for the synthesis of highly functionalized 2-(substitutedbiphenyl) based benzimidazoles has been reported by the application of Suzuki-Miyaura cross coupling reaction.