13730-10-4

Upstream product

• 6942-03-6 α-benzamidylbenzyl phenyl ketone 
• 62-53-3 aniline 
• 7196-81-8 2,2,4,5-tetraphenyl-2H-imidazole 
• 81640-85-9 N-benzoyl-N-(α-benzoylbenzyl)aniline 
• 81640-73-5 3-benzyl-1,2,4,5-tetraphenylimidazolium trifluoromethanesulphonate 
• 534-13-4 N,N-dimethylthiourea 
• 100-52-7 benzaldehyde 
• 134-81-6 benzil 
• 4903-36-0 N-phenyl-benzimidoyl chloride 
• 501-65-5 diphenyl acetylene 
• 5722-91-8 1,2-diphenyl-2-(phenylamino)ethanone 
• 100-47-0 benzonitrile 
• 1527-91-9 N²-phenylbenzimidamide 
• 119-53-9 2-hydroxy-2-phenylacetophenone 

Relevant academic research and scientific papers

Imidazole-Pyrene Hybrid Luminescent Materials for Organic Light-Emitting Diodes: Synthesis, Characterization & Electroluminescent Properties

A series of multichromophoric, pyrene-imidazole-phenyl based hybrid luminescent small molecules (PA, PI, PnB, PtB, PoM and PnDM) with different donating groups at the para position of the phenyl attached to N1 position of imidazole moiety were designed, synthesized, and characterized, for use in blue organic light-emitting diodes (OLEDs). The photophysical, thermal and electrochemical properties of the molecules were systematically investigated. All the molecules displayed delayed fluorescence at room temperature with a lifetime ranging from 7.1 to 8.5 μs. The synthesized fragment molecules (tetraphenyl-imidazoles: IA, IoM and InDM) revealed high triplet energies of ~ 2.90eV. Glass transition temperatures determined to range from 77°C to 123°C and decomposition temperatures are found to be above 280°C. The molecules possess appropriate HOMO and LUMO energy levels for effective charge injection. The crystal structure for PI is reported. OLED devices were fabricated based on the pyrene-imidazole-phenyl hybrids as emitters and as dopants with CBP as host. OLED devices with PI doped (5% wt.) with CBP exhibits excellent device performance with a current efficiency of 9.82 cd/A, the power efficiency of 8.32 lm/W and external quantum efficiency of 4.64%.

Synthesis of 2,4,5-triaryl and 1,2,4,5-tetraaryl imidazoles using silica chloride as an efficient and recyclable catalyst under solvent-free conditions

An efficient solvent-free synthesis of various 2,4,5-triaryl imidazoles and 1,2,4,5-tetraaryl imidazoles has been developed using silica chloride as a heterogeneous catalyst. The present methodology offers several advantages, such as excellent yields, shorter reaction times, economic availability, and reusability of catalyst.

Magnetic nanoparticle supported ionic liquid as novel and effective heterogeneous catalyst for synthesis of substituted imidazoles under ultrasonic irradiation

The ionic liquid 1-methyl-3-(3-trimethoxysilylpropyl)imidazolium chloride was immobilized on Fe3O4 nanoparticles and used as an efficient and reusable catalyst for the one-pot synthesis of 1,2,4,5-tetrasubstituted imidazoles at room

Perlite: An inexpensive natural support for heterogenization of HBF4

Nano-perlite-fluoroboric acid (n-PeFBA) has been synthesized by immobilization of HBF4 on perlite to produce an efficient green heterogeneous reusable solid acid catalyst. The catalyst was characterized by (FE-SEM, EDX, BET and BJH). This catalyst was employed to prepare biologically important 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles with high yields and selectivities. Advantages of solid acid include: low cost, facile handling, simple preparation, high stability, reusability and low toxicity. The catalyst could be recovered and reused for several runs without deterioration in catalytic activity.

Synthesis and characterization of nano-copper ferrite as a magnetically separable catalyst for the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under solvent-free condition

The authors report herein, synthesis and characterization of nano-copper ferrite as a recoverable, ecofriendly, inexpensive, and readily available catalyst for efficient, simple, and green synthesis of multisubstituted imidazoles. Short reaction times, high yields, easy workup, and mild condition are the advantages of this protocol. The catalyst can be reused without evident loss of the catalytic activity. Characterization of the catalyst was performed fully by Fourier transform infrared spectra, X-ray diffraction, FESEM, electron dispersive X-ray, and vibration sampling magnetometer analyses.

A one-pot synthesis of 1,2,4,5-tetraarylimidazoles using molecular iodine as an efficient catalyst

Molecular iodine is a cheap, nontoxic catalyst, which acts as an efficient catalyst for the synthesis of 1,2,4,5-tetraarylimidazoles using benzoin, an aromatic aldehyde and an amine in the presence of ammonium acetate. The advantage of this method is the

Solvent-free synthesis of 1,2,4,5-tetrasubstituted imidazoles using nano Fe3O4@SiO2-OSO3H as a stable and magnetically recyclable heterogeneous catalyst

Nano-Fe3O4 encapsulated-silica particles bearing sulfonic acid groups (Fe3O4@SiO2-OSO3H) has been used as an efficient and magnetically separable heterogeneous catalyst for the synthesis of 1,2,4,5-tetrasubstituted imidazoles by one-pot, four-component reaction of benzil, aromatic aldehydes, primary amines, and ammonium acetate under neat conditions. The effect of various reaction parameters, such as reaction temperature, catalyst loading and solvent effect, were studied. The desired products are obtained in relatively short reaction times with high yields. Importantly, the catalyst could be easily separated from the reaction mixture by a permanent magnet and reused for several times without the significant loss of its activity.

Application of a Keplerate type giant nanoporous isopolyoxomolybdate as a reusable catalyst for the synthesis of 1,2,4,5-tetrasubstituted imidazoles

The Keplerate-type giant nanoporous isopolyoxomolybdate (NH4)42[MoVI72MoV60O372-(CH3COO)30(H2O)72], denoted {Mo132}, has been used as a catalyst for the synthesis of 1,2,4,5-tetrasubstituted imidazoles by the one-pot, four-component thermal reaction of benzil with aromatic aldehydes, primary amines, and ammonium acetate under solvent-free conditions. The catalyst was prepared according to a previously published literature procedure using inexpensive and readily available starting materials, and subsequently characterized by FT-IR, UV and X-ray diffraction spectroscopy, as well as microanalysis. The results showed that {Mo132} exhibited high catalytic activity towards the synthesis of 1,2,4,5-tetrasubstituted imidazoles, with the desired products being formed in good to high yields. Furthermore, the catalyst was recyclable and could be reused at least three times without any discernible loss in its catalytic activity. Overall, this new catalytic method for the synthesis of 1,2,4,5-tetrasubstituted imidazoles provides rapid access to the desired compounds following a simple work-up procedure, and avoids the use of harmful organic solvents. This method therefore represents a significant improvement over the methods currently available for the synthesis of tetrasubstituted imidazoles.

Tuning the photophysical properties of heteroleptic Ir(III) complexes through ancillary ligand substitution: Experimental and theoretical investigation

A series of new phosphorescent heteroleptic Iridium(III) complexes with 2-phenylpyridine, acetylacetone and 2-picolinic acid as ancillary ligands have been designed and synthesized. The photophysical and electrochemical properties have been investigated e

Utilization of eggshell waste as green catalyst for application in the synthesis of 1,2,4,5-tetra-substituted imidazole derivatives

Abstract: Eggshell as a solid waste was loaded on a nano-Fe3O4 surface. Then, in one step, it (Fe3O4@eggshell) was converted to Fe3O4@Ca3(PO4)2 as a nano-magnetic, green, cheap, and environmentally friendly catalyst. Techniques such as FT-IR, VSM, FESEM, TEM, EDX, XRD, and TGA were used to characterize the as-synthesized catalyst. The catalytic activity of Fe3O4@Ca3(PO4)2 was evaluated in the synthesis of 1,2,4,5-tetra-substituted imidazole derivatives through a one-pot multicomponent reaction. The design of the experiment as a systematic statistical approach was used to obtain the optimum point of the reaction condition so that 0.05?g of the as-synthesized catalyst and 94.77?°C were the best condition (which provides 90% yield for the benchmark reaction). Then, 1,2,4,5-tetra-substituted imidazole derivatives in the optimum condition were synthesized with very low reaction times in good yields. The as-prepared catalyst was retrieved through a magnet and used several times without significant loss of catalytic activity. Graphical abstract: [Figure not available: see fulltext.]