7035-68-9Relevant articles and documents
Preparation and characterization of two bronsted acid ionic liquids
Chen, Shuanhu,Wang, Mingtian,Wang, Fei,Yang, Fenrong,Shi, Suqing,Wang, Nani
, p. 1027 - 1031 (2011)
Two Bronsted acid task specific ionic liquids based on the benizimidazolium cation (1-ethylbenzimidazolium tetrafluoroborate {[H-eBim]BF4 (1)} and 1-propylbenzimidazolium tetrafluoroborate {[H-pBim]BF4 (2)}) were synthesized and characterized. The crystal of 1 is in orthorhombic system with space group Pnma, and the unit cell parameters as follows: a = 9.9308(16), b = 6.8813(11), c = 15.345(3) A, V = 1048.6(3) A3, Z = 4, Dc = 1.482 g/cm3. Structure 2 crystallizes in the monoclinic space group P21/c, with unit cell a = 4.9688(14), b = 13.684(4), c = 17.295(5) A, β = 92.090(6)°, V = 1175.2(6) A3, Z = 4, Dc = 1.402 g/cm3. These molecules are stabilized in solid state by various intra and intermolecular hydrogen bonding interactions to give polymeric structures.
N-Heterocyclic carbene copper(i), mercury(ii) and silver(i) complexes containing durene linker: Synthesis and structural studies
Liu, Qing-Xiang,Chen, Ai-Hui,Zhao, Xiao-Jun,Zang, Yan,Wu, Xiu-Mei,Wang, Xiu-Guang,Guo, Jian-Hua
, p. 293 - 305 (2011)
The dibenzimidazolium salts bis[N-(alkyl)benzimidazoliumylmethyl] durene·2X (1a: alkyl = C2H5, X = Br; 1b: alkyl = C2H5, X = PF6; 1c: alkyl = n-C 3H7, X = Cl; 1d: alkyl = n-Csub
Using Methanol as a Formaldehyde Surrogate for Sustainable Synthesis of N-Heterocycles via Manganese-Catalyzed Dehydrogenative Cyclization
Li, Yibiao,Liu, Qiang,Shao, Zhihui,Yuan, Shanshan
supporting information, (2022/02/23)
The development of an efficient and sustainable synthetic route for formaldehyde production from renewable feedstock, especially in combination with a subsequent transformation to straightforwardly construct valuable chemicals, is highly desirable. Herein, we report a novel manganese-catalyzed dehydrogenative cyclization of methanol as a formaldehyde surrogate with a variety of dinucleophiles for facile synthesis of N-heterocycles. The in situ generated formaldehyde via catalytic methanol dehydrogenation can be selectively trapped by diverse dinucleophiles to avoid several possible side reactions. The utility of this transformation is further highlighted by its successful application to the synthesis of 13C-labeled N-heterocycles using 13CH3OH as a readily accessible 13C-isotope reagent.
Self-Assembly of Benzimidazole-Derived Tris-NHC Ligands and AgI-Ions to Hexanuclear Organometallic Cages and Their Unusual Transmetalation Chemistry
Nishad, Rajeev C.,Rit, Arnab
supporting information, p. 594 - 599 (2020/12/07)
Multi-ligand self-assembly to attain the AgI-N-heterocyclic carbene (NHC)-built hexanuclear organometallic cages of composition [Ag6(3 a,b)4](PF6)6 from the reaction of benzimidazole-derived tris(azolium) salts [H3-3 a,b](PF6)3 with Ag2O was achieved. The molecular structures of the cages were established by X-ray diffraction studies along with NMR and MS analyses. The existence of a single assembly in solution was supported by diffusion-ordered spectroscopy (DOSY) 1H NMR spectra. Further, transmetalation reactions of these self-assembled complexes, [Ag6(3 a,b)4](PF6)6, with CuI/AuI-ions provided various coinage metal-NHC complexes having diverse molecular compositions, which included the first example of a hexanuclear CuI-dodecacarbene complex, [Cu6(3 b)4](PF6)6.
Highly efficient one pot synthesis of benzimidazoles from 2-nitroaniline and PhSiH3 as reducing agent catalyzed by Pd/C as a heterogeneous catalyst
Phatake, Vishal V.,Bhanage, Bhalchandra M.
, (2021/03/15)
This work reports an efficient route for the synthesis of benzimidazole from o-nitroaniline in the presence of carbon dioxide atmosphere, PhSiH3 as a reducing agent catalyzed by Pd/C as a catalyst. Benzimidazoles have become the focus of organic chemists, as benzimidazole is an important intermediate in medicinal chemistry. We have developed more efficient route for the synthesis benzimidazole and various substituted benzimidazoles have been synthesized in good to excellent yield. The TBD (1,5,7-Triazabicyclo [4.4.0] dec-5-ene) is selected as a base as it promotes the CO2 insertion. Benzimidazoles were synthesized through reduction of nitro group followed by cyclization of amine using CO2 as a carbon source. Moreover, the Pd/C catalyst can be recycled up to five recycle run without significant changes in the yield of the product.