M.W=400-450 Archives - Page 31 of 35 - Imidazoles-derivatives

Ling, Bo team published research in Organic Letters in 2020 | 250285-32-6

250285-32-6, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

1,3-Bis(2,6-diisopropylphenyl)imidazolium Chloride is an imidazolium salt that is active against all stages of Trypanosoma cruzi and may represent a promising candidate for treatment of Chagas disease.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride is an organic compound that is used as a solvent. It was originally synthesized by reacting triethyl orthoformate with 2,6-diisopropylaniline. This reaction formed the corresponding imidazolium salt. The synthesis of this compound was later improved by using ring-opening polymerization of glycolide and furfural. 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride is mainly used to extract estradiol from urine samples in clinical laboratories., HPLC of Formula: 250285-32-6

Imidazole Biochem/physiol Actions: Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division. 250285-32-6, formula is C27H37ClN2, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride. It also acts as a microtubule destabilizing agents and inhibits topoisomerase and Cytochrome P450 Family 26 Subfamily A Member 1 (CYP26A1) enzymes. HPLC of Formula: 250285-32-6.

Ling, Bo;Yang, Wenjun;Wang, Yan-En;Mao, Jianyou research published 《 Cooperative N-Heterocyclic Carbene/Palladium-Catalyzed Umpolung 1,4-Addition of Vinyl Bromides to Enals》, the research content is summarized as follows. A highly stereoselective umpolung 1,4-addition of vinyl bromides to enals is enabled by NHC/palladium cooperative catalysis, generating various valuable γ,δ-unsaturated carbonyl derivatives in excellent yields (up to 90%). A detailed mechanism investigation indicates the NHC act as both organocatalyst and ligand for palladium during this system.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Liu, Wenbo team published research in Chemistry – An Asian Journal in 2021 | 250285-32-6

Related Products of 250285-32-6, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. 250285-32-6, formula is C27H37ClN2, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride. Their solubility in alcohol is lower than that in water and decreases with increasing molecular weight of the alcohols . Related Products of 250285-32-6.

Liu, Wenbo;Tang, Peichen;Zheng, Yi;Ren, Yun-Lai;Tian, Xinzhe;An, Wankai;Zheng, Xianfu;Guo, Yinggang;Shen, Zhenpeng research published 《 Cu₂O-Catalyzed Conversion of Benzyl Alcohols Into Aromatic Nitriles via the Complete Cleavage of the C≡N Triple Bond in the Cyanide Anion》, the research content is summarized as follows. Nitrogen transfer from cyanide anion to an aldehyde is emerging as a promising method for the synthesis of aromatic nitriles. However, this method still suffers from a disadvantage that a use of stoichiometric Cu(II) or Cu(I) salts is required to enable the reaction. As authors report herein, overcame this drawback and developed a catalytic method for nitrogen transfer from cyanide anion to an alc. via the complete cleavage of the C≡N triple bond using phen/Cu₂O as the catalyst. The present condition allowed a series of benzyl alcs. to be smoothly converted into aromatic nitriles in moderate to high yields. In addition, the present method could be extended to the conversion of cinnamic alc. to 3-phenylacrylonitrile.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Liu, Yaxu team published research in European Journal of Inorganic Chemistry in 2022 | 250285-32-6

Reference of 250285-32-6, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Liu, Yaxu;Scattolin, Thomas;Gobbo, Alberto;Belis, Marek;Van Hecke, Kristof;Nolan, Steven P.;Cazin, Catherine S. J. research published 《 A Simple Synthetic Route to Well-Defined [Pd(NHC)Cl(1-^tBu-indenyl)] Pre-catalysts for Cross-Coupling Reactions》, the research content is summarized as follows. A simple synthetic access to [Pd(NHC)Cl(1-tBu-indenyl)] complexes bearing different saturated and unsaturated NHC ligands was reported. All complexes were obtained in excellent yields under mild conditions (60°C, 1 h) in the presence of the weak base K₂CO₃ in green acetone as the solvent. We view synthetic access as vital in delineating the precatalyst choice and have demonstrated here the facile access to these complexes was reported. The catalytic activity of the synthesized derivatives were investigated on three different cross-coupling reactions such as Suzuki-Miyaura, unconventional Suzuki-Miyaura reaction and Buchwald-Hartwig amination to form Ar¹Ar² [Ar¹ = Ph, 4-MeC₆H₄, 4-FC₆H₄, etc.; Ar² = Ph, 4-MeOC₆H₄, 4-MeC₆H₄, etc.], and PhC(O)Ar [Ar = Ph, 3-MeOC₆H₄, 4-MeC₆H₄, etc.], R¹NR²R³ [R¹ = 4-OMe, 4-CF₃; R² = Ph, R³ = Me; R²R³ = CH₂CH₂OCH₂CH₂] resp.. Complex [Pd(IPr*)Cl(1-tBu-indenyl)], which borne the less electron-donating IPrCl ligand, showed the best performance on conventional Suzuki-Miyaura reaction of (aryl chlorides/arylboronic acids) and Buchwald-Hartwig amination using MeOH/THF and the green 2-MeTHF as solvents, resp. Moreover, for the challenging unconventional Suzuki-Miyaura reaction between esters and arylboronic acids, [Pd(IPr*)Cl(1-tBu-indenyl)] showed the highest activity among all catalysts tested.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Liu, Yaxu team published research in European Journal of Organic Chemistry in 2022 | 250285-32-6

Formula: C27H37ClN2, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Liu, Yaxu;Voloshkin, Vladislav A.;Scattolin, Thomas;Peng, Min;Van Hecke, Kristof;Nolan, Steven P.;Cazin, Catherine S. J. research published 《 Versatile and Highly Efficient trans-[Pd(NHC)Cl₂(DMS/THT)] Precatalysts for C-N and C-C Coupling Reactions in Green Solvents》, the research content is summarized as follows. A straightforward synthetic procedure to well-defined, air- and moisture- stable trans-[Pd(NHC)Cl₂(DMS/THT)] (NHC=IPr, SIPr, IMes, IPrCl, IPr*, IPr#) pre-catalysts was reported. These complexes were obtained by reacting NHC.HCl imidazolium salts with trans-[PdCl₂(DMS/THT)2] precursors with the assistance of the weak base K₂CO₃ in green acetone at40°C. The scalability of this protocol was demonstrated. The catalytic activity of the synthesized complexes was studied in the Buchwald-Hartwig and Suzuki-Miyaura reactions. Remarkably, most of the synthesized complexes exhibited higher catalytic activity with respect to their PEPPSI congeners in the Buchwald-Hartwig amination in 2-MeTHF. In particular, complex trans-[Pd(IPr#)Cl₂(DMS)] enabled the coupling of various (hetero)aryl chlorides and primary/secondary amines with a 0.2 mol% catalyst loading. In addition, trans-[Pd(IPr)Cl₂(DMS)] showed excellent performance in the room-temperature Suzuki-Miyaura reaction involving various (hetero)aryl chlorides and aryl boronic acids. In summary, the synthesized complexes, especially trans-[Pd(NHC)Cl₂(DMS)], was considered as greener alternatives to classical PEPPSI type catalysts based on the lower toxicity of the throw-away DMS ligand compared to 3-chloropyridine.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Li, Jiayi team published research in Angewandte Chemie, International Edition in 2020 | 250285-32-6

Synthetic Route of 250285-32-6, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Li, Jiayi;Wang, Liding;Zhao, Zifeng;Li, Xiaoyue;Yu, Xiao;Huo, Peihao;Jin, Qionghua;Liu, Zhiwei;Bian, Zuqiang;Huang, Chunhui research published 《 Two-Coordinate Copper(I)/NHC Complexes: Dual Emission Properties and Ultralong Room-Temperature Phosphorescence》, the research content is summarized as follows. As a kind of photoluminescent material, Cu^I complexes have many advantages such as adjustable emission, variable structures, and low cost, attracting attention in many fields. In this work, two novel two-coordinate Cu^I-N-heterocyclic carbene complexes were synthesized, and they exhibit unique dual emission properties, fluorescence and phosphorescence. The crystal structure, packing mode, and photophys. properties under different conditions were systematically studied, proving the emissive mechanism to be the locally excited state of the carbazole group. Based on this mechanism, ultralong room-temperature phosphorescence (RTP) with a lifetime of 140 ms is achieved by selective deuteration of the carbazole group. These results deepen the understanding of the luminescence mechanism and design strategy for two-coordinate Cu^I complexes, and prove their potential in applications as ultralong RTP materials.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Li, Ninglin team published research in Journal of Organic Chemistry in 2021 | 250285-32-6

Name: 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . 250285-32-6, formula is C27H37ClN2, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride. In contrast, the solubility of benzimidazoles in alcohols (C3–C6) is higher than in water and generally decreases with an increase of the alkyl chain length of the alcohols. Name: 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride.

Li, Ninglin;Xiong, Fuqiang;Gao, Ke research published 《 Cobalt-Catalyzed Protodeboronation of Aryl and Vinyl Boronates》, the research content is summarized as follows. An efficient cobalt-based catalytic system for protodeboronation of various aryl and vinyl boronates ArR [R = 5,5-dimethyl-1,3,2-dioxaborinan-2-yl, tetramethyl-1,3,2-dioxaborolan-2-yl, 1,3,2-dioxaborolan-2-yl, 4-oxo-1,2,3,4-tetrahydro-1,3,2-benzodiazaborinin-2-yl; Ar = 4-chlorophenyl, 4-(9H-carbazol-9-yl)benzen-1-yl, anthracen-2-yl, etc.]/(E/Z)-Ar¹CH=C(R¹)R² (Ar¹ = 4-bromophenyl, 1-benzothiophen-2-yl, pyridin-2-yl, etc.; R¹ = H, Ph, tetramethyl-1,3,2-dioxaborolan-2-yl; R² = Ph, 5,5-dimethyl-1,3,2-dioxaborinan-2-yl, tetramethyl-1,3,2-dioxaborolan-2-yl) is described. The reaction is capable of tolerating a wide range of functional groups. The reaction is also extended to deuterodeboronation with D₂O, which provides a potential protocol for the synthesis of regiospecifically deuterated arenes and olefins R³D [R³ = 4-phenylphenyl, 3-(4-cyanophenyl)prop-1-en-1-yl, 4-(9H-carbazol-9-yl)benzen-1-yl, 2-(4-([6,7-bis(2-methoxyethoxy)quinazolin-4-yl]amino)phenyl)ethenyl, etc.].

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Li, Dan team published research in Synthetic Communications in 2021 | 250285-32-6

Quality Control of 250285-32-6, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Imidazole is a five-membered heterocyclic moiety that possesses three carbon, two nitrogen, four hydrogen atoms, and two double bonds. 250285-32-6, formula is C27H37ClN2, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride. It is also known as 1, 3-diazole. It contains two nitrogen atoms, in which one nitrogen bear a hydrogen atom, and the other is called pyrrole type nitrogen. Quality Control of 250285-32-6.

Li, Dan;Tian, Qingqiang;Wang, Xuetong;Wang, Qiang;Wang, Yin;Liao, Siwei;Xu, Ping;Huang, Xin;Yuan, Jianyong research published 《 N-Heterocyclic carbene palladium (II)-pyridine (NHC-Pd (II)-Py) complex catalyzed heck reactions》, the research content is summarized as follows. A mild, efficient, and practical catalytic system for the synthesis of highly privileged stilbene pharmacophores was reported. This system used N-heterocyclic carbene palladium (II) Pyridine (NHC-Pd (II)-Py) complex to catalyze the formation of carbon-carbon bonds between olefin derivatives and various bromide. This simple, gentle and user-friendly method offered a variety of stilbene products in excellent yields under solvent-free condition. And its scale-up reaction had excellent yield and this system can be applied to industrial fields. The utility of this method was highlighted by its universality and modular synthesis of a series of bioactive mols. or important medical intermediates.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Li, Dazhi team published research in Journal of Organometallic Chemistry in 2020 | 250285-32-6

Recommanded Product: 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, also known as 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, is a useful research compound. Its molecular formula is C27H37ClN2 and its molecular weight is 425 g/mol. The purity is usually 95%.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Li, Dazhi;Ollevier, Thierry research published 《 Mechanism studies of oxidation and hydrolysis of Cu(I)-NHC and Ag-NHC in solution under air》, the research content is summarized as follows. The decomposition of copper(I)-NHC and silver-NHC complexes in solution under air was studied. The Cu(I)-NHCs were oxidized into urea derivatives and hydrolyzed into imidazoliums or benzimidazoliums. The decomposition of Ag-NHC with a saturated backbone led to ring-opening product, while the Ag-NHC with an unsaturated backbone led to imidazolium and Ag-bisNHC complex. The effects of steric property, hydrophilicity, and binding energy of NHC to O₂ and H₂O on the decomposition of Cu(I)-NHC were studied using theor. calculations Steric hindrance played an important role on the stability of Cu(I)-NHC. Pathways for the decomposition of Cu(I)-NHC and Ag-NHC were proposed.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kawamura, Kiana E. team published research in Organometallics in 2022 | 250285-32-6

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Imidazole based anticancer drug find applications in cancer chemotherapy. 250285-32-6, formula is C27H37ClN2, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC). Quality Control of 250285-32-6.

Kawamura, Kiana E.;Chang, Alison Sy-min;Martin, Daryl J.;Smith, Haley M.;Morris, Parker T.;Cook, Amanda K. research published 《 Modular Ni(0)/Silane Catalytic System for the Isomerization of Alkenes》, the research content is summarized as follows. Alkenes were used ubiquitously as starting materials and synthetic targets in all areas of chem. Controlling their geometry and position along a chain is vital to their reactivity and properties yet remains challenging. Alkene isomerization is an atom-economical process to synthesize targeted alkenes, and selectivity can be controlled using transition metal catalysts. The development of mild, selective isomerization reactivity has enabled efficient tandem catalytic systems for the remote functionalization of alkenes, a process in which a starting alkene is isomerized to a new position prior to the functionalization step. The key challenges in developing isomerization catalysts for remote functionalization applications are (i) a lack of modularity in the catalyst structure and (ii) the requirement of nonmodular and/or harsh additives during catalyst activation. The authors address both challenges with a modular (NHC)Ni(0)/silane catalytic system (NHC, N-heterocyclic carbene), demonstrating the use of triaryl silanes and readily accessible (NHC)Ni(0) complexes to form the proposed active (NHC) (silyl)Ni-H species in situ. Modification of the steric and electronic nature of the catalyst via modification of the ancillary ligand and silane partner, resp., is easily achieved, creating a uniquely versatile catalytic system that is effective for the formation of internal alkenes with high yield and selectivity for the E-alkene. The use of silanes as mild activators enables isomerization of substrates with a variety of functional groups, including acid-labile groups. The broad substrate scope, enabled by catalyst design, makes this catalytic system a strong candidate for use in tandem catalytic applications. Preliminary mechanistic studies support a Ni-H insertion/elimination pathway.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kleybolte, Moritz E. team published research in Macromolecules (Washington, DC, United States) in 2022 | 250285-32-6

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Kleybolte, Moritz E.;Vagin, Sergei I.;Rieger, Bernhard research published 《 High-Molecular-Weight Bisalkoxy-Substituted Poly(para)phenylenes by Kumada Polymerization》, the research content is summarized as follows. Substituted poly(para)phenylenes (PPPs) are conjugated polymers with an attractive application potential in various fields of materials science. They are synthesized nearly exclusively using catalytic cross-coupling polymerization reactions based on Pd- or Ni-catalysts. Among these synthetic approaches to access alkoxy-substituted PPPs, Kumada catalyst transfer polymerization (KCTP or GRIM polymerization) would offer certain economic advantages over Suzuki-type polymerization as it relies on the utilization of a non-precious metal for catalysis. It also results in less total costs of the utilized reagents, avoiding addnl. preparative steps such as synthesis, isolation, and purification of boronic acid derivatives necessary for the Suzuki reaction. In fact, KCTP is nowadays the state-of-the-art method for the synthesis of polythiophenes. However, the application of KCTP for the synthesis of alkoxy-substituted PPPs leads to polymers with low mol. weights, limiting their practical applicability. Here, we developed a synthesis protocol that resulted in MEH-PPP with a mol. weight of M_n = 133 kg/mol and BHex-PPP with M_n = 153 kg/mol relative to polystyrene, outperforming the previous state of the art by a factor more than 5. Also, a tetra(ethylene glycol)-substituted PPP has been prepared by this procedure, with a mol. weight exceeding the previously reported results for analogous structures. Such mol. weights can be obtained in a reasonable reaction time (5 days) using low concentrations of an N-heterocyclic carbene-coordinated Ni complex. The polymerization kinetics suggested a chain-growth mechanism with a chain transfer step. The latter is caused most likely by a bimol. interaction of the Ni-species at the polymer chain ends.

1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride has been used to generate N-heterocyclic carbene catalysts for use in carbonylative cross-coupling of pyridyl halides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem