Category: imidazoles-derivatives

《Iron-Catalyzed Cross-Coupling of Alkynyl and Styrenyl Chlorides with Alkyl Grignard Reagents in Batch and Flow》 was published in Chemistry – A European Journal in 2019. These research results belong to Deng, Yuchao; Wei, Xiao-Jing; Wang, Xiao; Sun, Yuhan; Noel, Timothy. COA of Formula: C27H39ClN2 The article mentions the following:

A selective, practical and fast iron-based cross-coupling reaction that enabled the formation of Csp-Csp3 and Csp2-Csp3 bonds. In a telescoped flow process, the reaction can be combined with the Grignard reagent synthesis. Moreover, flow allowed the use of a supporting ligand to be avoided without eroding the reaction selectivity. The results came from multiple reactions, including the reaction of 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 258278-25-0COA of Formula: C27H39ClN2)

1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 258278-25-0) may be used as a precursor to the free carbene 1,3-bis(2,6-diisopropylphenyl)-2-imidazolidinylidene, and also used as an in situ formed catalyst in a variety of reactions, e.g. amination, Heck coupling reaction, the ring-opening metathesis polymerization (ROMP), hydrogenation.COA of Formula: C27H39ClN2In addition, it can efficiently catalyze the Suzuki-Miyaura coupling of aryl chlorides with aryl boronic acids.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Quality Control of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborateIn 2020 ,《Preparation and characterization of PEBAX-5513/AgBF4/BMIMBF4 membranes for olefin/paraffin separation》 was published in Polymers (Basel, Switzerland). The article was written by Kim, So Young; Cho, Younghyun; Kang, Sang Wook. The article contains the following contents:

In this study, we investigated a poly(ether-block-amide)-5513 (PEBAX-5513)/AgBF4/ 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) composite membrane, which is expected to have a high stabilizing effect on the Ag+ ions functioning as olefin carriers in the amide group. Poly(ethylene oxide) (PEO) only consists of ether regions, whereas the PEBAX-5513 copolymer contains both ether and amide regions. However, given the brittle nature of the amide, the penetration of BMIMBF4 remains challenging. The nanoparticles did not stabilize after their formation in the long-term test, thereby resulting in a poor performance compared to previous experiments using PEO as the polymer (selectivity 3; permeance 12.3 GPU). The properties of the functional groups in the polymers were assessed using Fourier transform IR spectroscopy, SEM, and thermogravimetric anal., which confirmed that the properties endowed during the production of the film using the ionic liquid can impact the performance. In the part of experimental materials, we found many familiar compounds, such as 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6Quality Control of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate)

3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6) is a member of lonic liquids. Actually, lonic liquids as innovative fluids have received wide attention only during the past two decades. The number of SCI papers published on lonic liquids has exponentially increased from a few in 1996 to >5000 in 2016, exceeding the annual growth rates of other popular scientific areas. Quality Control of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Quality Control of Di(1H-imidazol-1-yl)methanoneIn 2020 ,《Tough and Multi-Recyclable Cross-Linked Supramolecular Polyureas via Incorporating Noncovalent Bonds into Main-Chains》 appeared in Advanced Materials (Weinheim, Germany). The author of the article were Qin, Bo; Zhang, Shuai; Sun, Peng; Tang, Bohan; Yin, Zihe; Cao, Xiao; Chen, Quan; Xu, Jiang-Fei; Zhang, Xi. The article conveys some information:

Covalent thermosets generally exhibit robust mech. properties, while they are fragile and lack the ability to be reprocessed or recycled. Herein, a new strategy of incorporating noncovalent bonds into main-chains is developed to construct tough and multi-recyclable crosslinked supramol. polyureas (CSPU), which are prepared via the copolymerization of diisocyanate monomers, noncovalently bonded diamine monomers linked by quadruple hydrogen bonds, and covalent diamine/triamine monomers. The CSPU exhibit remarkable solvent resistance and outstanding mech. properties owing to the covalent crosslinking via triamine monomer. Through the incorporation of 9.7% and 14.6% quadruple hydrogen bonded diamine monomer, the transparent CSPU films are endowed with superior toughness of 74.17 and 124.17 MJ m-3, resp. Impressively, even after five generations of recycling processes, the mech. properties of reprocessed CSPU can recover more than 95% of their original properties, displaying excellent multiple recyclablity. As a result, the superior toughness, remarkable solvent resistance, high transparency, and excellent multiple recyclability are well-combined in the CSPU. It is highly anticipated that this line of research will provide a facile and general method to construct various crosslinked polymer materials with superior recyclability and mech. properties. The experimental process involved the reaction of Di(1H-imidazol-1-yl)methanone(cas: 530-62-1Quality Control of Di(1H-imidazol-1-yl)methanone)

Di(1H-imidazol-1-yl)methanone(cas: 530-62-1) is a coupling agent in the synthesis of dipolar polyamides for nonlinear optical applications and polypeptides. It also used to make β-keto sulfones and sulfoxides, lead sequestering agents, and β-enamino acid derivatives.Quality Control of Di(1H-imidazol-1-yl)methanone

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Recommanded Product: 16681-56-4In 2008 ,《Rescoring Docking Hit Lists for Model Cavity Sites: Predictions and Experimental Testing》 appeared in Journal of Molecular Biology. The author of the article were Graves, Alan P.; Shivakumar, Devleena M.; Boyce, Sarah E.; Jacobson, Matthew P.; Case, David A.; Shoichet, Brian K.. The article conveys some information:

Mol. docking computationally screens thousands to millions of organic mols. against protein structures, looking for those with complementary fits. Many approximations are made, often resulting in low “”hit rates.””. A strategy to overcome these approximations is to rescore top-ranked docked mols. using a better but slower method. One such is afforded by mol. mechanics-generalized Born surface area (MM-GBSA) techniques. These more phys. realistic methods have improved models for solvation and electrostatic interactions and conformational change compared to most docking programs. To investigate MM-GBSA rescoring, the authors reranked docking hit lists in three small buried sites: a hydrophobic cavity that binds apolar ligands, a slightly polar cavity that binds aryl and hydrogen-bonding ligands, and an anionic cavity that binds cationic ligands. These sites are simple; consequently, incorrect predictions can be attributed to particular errors in the method, and many likely ligands may actually be tested. In retrospective calculations, MM-GBSA techniques with binding-site minimization better distinguished the known ligands for each cavity from the known decoys compared to the docking calculation alone. This encouraged us to test rescoring prospectively on mols. that ranked poorly by docking but that ranked well when rescored by MM-GBSA. A total of 33 mols. highly ranked by MM-GBSA for the three cavities were tested exptl. Of these, 23 were observed to bind-these are docking false negatives rescued by rescoring. The 10 remaining mols. are true negatives by docking and false positives by MM-GBSA. X-ray crystal structures were determined for 21 of these 23 mols. In many cases, the geometry prediction by MM-GBSA improved the initial docking pose and more closely resembled the crystallog. result; yet in several cases, the rescored geometry failed to capture large conformational changes in the protein. Intriguingly, rescoring not only rescued docking false positives, but also introduced several new false positives into the top-ranking mols. The authors consider the origins of the successes and failures in MM-GBSA rescoring in these model cavity sites and the prospects for rescoring in biol. relevant targets. The experimental process involved the reaction of 2-Bromo-1H-imidazole(cas: 16681-56-4Recommanded Product: 16681-56-4)

2-Bromo-1H-imidazole(cas: 16681-56-4) is a member of imidazole. Its exclusive structural characteristics with enviable electron-rich features are favorable for imidazole-based fused heterocycles to bind efficiently with an array of enzymes and receptors in biological systems through various weak interactions like hydrogen bonds, ion-dipole, cation-π, π-π stacking, coordination, Van der Waals forces, hydrophobic effects, etc., and therefore they demonstrate widespread bioactivities. Recommanded Product: 16681-56-4

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

SDS of cas: 174501-65-6In 2021 ,《Mobility gradients yield rubbery surfaces on top of polymer glasses》 appeared in Nature (London, United Kingdom). The author of the article were Hao, Zhiwei; Ghanekarade, Asieh; Zhu, Ningtao; Randazzo, Katelyn; Kawaguchi, Daisuke; Tanaka, Keiji; Wang, Xinping; Simmons, David S.; Priestley, Rodney D.; Zuo, Biao. The article conveys some information:

Abstract: Many emerging materials, such as ultrastable glasses1,2 of interest for phone displays and OLED television screens, owe their properties to a gradient of enhanced mobility at the surface of glass-forming liquids The discovery of this surface mobility enhancement3-5 has reshaped our understanding of the behavior of glass formers and of how to fashion them into improved materials. In polymeric glasses, these interfacial modifications are complicated by the existence of a second length scale-the size of the polymer chain-as well as the length scale of the interfacial mobility gradient6-9. Here we present simulations, theory and time-resolved surface nano-creep experiments to reveal that this two-scale nature of glassy polymer surfaces drives the emergence of a transient rubbery, entangled-like surface behavior even in polymers comprised of short, subentangled chains. We find that this effect emerges from superposed gradients in segmental dynamics and chain conformational statistics. The lifetime of this rubbery behavior, which will have broad implications in constraining surface relaxations central to applications including tribol., adhesion, and surface healing of polymeric glasses, extends as the material is cooled. The surface layers suffer a general breakdown in time-temperature superposition (TTS), a fundamental tenet of polymer physics and rheol. This finding may require a reevaluation of strategies for the prediction of long-time properties in polymeric glasses with high interfacial areas. We expect that this interfacial transient elastomer effect and TTS breakdown should normally occur in macromol. systems ranging from nanocomposites to thin films, where interfaces dominate material properties5,10. The experimental process involved the reaction of 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6SDS of cas: 174501-65-6)

3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6) is a member of lonic liquids. Actually, lonic liquids as innovative fluids have received wide attention only during the past two decades. The number of SCI papers published on lonic liquids has exponentially increased from a few in 1996 to >5000 in 2016, exceeding the annual growth rates of other popular scientific areas. SDS of cas: 174501-65-6

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Pandey, Himanshu; Shrivastava, S. P. published their research in Oriental Journal of Chemistry in 2021. The article was titled 《One pot synthesis, characterization of benzothiazole/benzimidazole tethered imidazole derivatives using clay as catalyst》.Formula: C7H7N3 The article contains the following contents:

A green approach for benzothiazole/benzimidazole tethered imidazole derivative synthesis utilizing brick derived clay as a catalyst were reported. Brick clay catalyst used in this synthesis were shown excellent catalytic activity by increasing efficiency, reducing the reaction time and most importantly it was reusable for further reaction runs. These derivatives were synthesized by multi component condensation reaction that involved benzil, aldehyde, 2-aminobenzimidazole/2-amino-6-nitrobenzothiazole and ammonium acetate. The clay catalyst was characterized by FT-IR while the synthesized derivatives were characterized by FT-IR, 1H NMR and 13C NMR. Brick clay was a cheap, non-hazardous catalyst and were reused up to many reaction runs with good to excellent yields. In the experimental materials used by the author, we found 1H-Benzo[d]imidazol-2-amine(cas: 934-32-7Formula: C7H7N3)

1H-Benzo[d]imidazol-2-amine(cas: 934-32-7) can be used in the hydrolysis of a choline carbonate. It was also used in the synthesis of imidazo[1,2-a]benzimidazoles.Formula: C7H7N3

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In 2010,Chemistry – A European Journal included an article by Smejkal, Tomas; Gribkov, Denis; Geier, Jens; Keller, Manfred; Breit, Bernhard. Formula: C6H10N2O2S. The article was titled 《Transition-State Stabilization by a Secondary Substrate-Ligand Interaction: A New Design Principle for Highly Efficient Transition-Metal Catalysis》. The information in the text is summarized as follows:

A library of monodentate phosphane ligands, each bearing a guanidine receptor unit for carboxylates, was designed. Screening of the library gave some excellent catalysts for regioselective hydroformylation of β,γ-unsaturated carboxylic acids. A terminal alkene, but-3-enoic acid, was hydroformylated with a linear/branched (l/b) regioselectivity up to 41. An internal alkene, pent-3-enoic acid was hydroformylated with regioselectivity up to 18:1. Further substrate selectivity (e.g., acid vs. Me ester) and reaction site selectivity (monofunctionalization of 2-vinylhept-2-enoic acid) were also achieved. Exploration of the structure-activity relationship and a practical and theor. mechanistic study gave us an insight into the nature of the supramol. guanidinium-carboxylate interaction within the catalytic system. This allowed us to identify a selective transition-state stabilization by a secondary substrate-ligand interaction as the basis for catalyst activity and selectivity. The results came from multiple reactions, including the reaction of Methyl 2-(methylthio)-4,5-dihydro-1H-imidazole-1-carboxylate(cas: 60546-77-2Formula: C6H10N2O2S)

Methyl 2-(methylthio)-4,5-dihydro-1H-imidazole-1-carboxylate(cas: 60546-77-2) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies. Formula: C6H10N2O2S

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Product Details of 866926-59-2On October 14, 2005 ,《Room-Temperature Negishi Cross-Coupling of Unactivated Alkyl Bromides with Alkyl Organozinc Reagents Utilizing a Pd/N-Heterocyclic Carbene Catalyst》 was published in Journal of Organic Chemistry. The article was written by Hadei, Niloufar; Kantchev, Eric Assen B.; O’Brien, Christopher J.; Organ, Michael G.. The article contains the following contents:

A high-yielding cross-coupling reaction of unactivated alkyl bromides possessing β-hydrogens with alkylzinc halides utilizing a Pd/N-heterocyclic carbene (NHC) catalyst at room temperature is described. A variety of Pd sources, Pd2(dba)3, Pd(OAc)2, or PdBr2, with the com. available ligand precursor 1,3-bis(2,6-diisopropylphenyl)imidazolium chloride successfully coupled 1-bromo-3-phenylpropane with n-butylzinc bromide in THF/NMP. An investigation of different NHC precursors showed that the bulky 2,6-diisopropylphenyl moiety was necessary to achieve high coupling yields (75-85%). The corresponding Et analog was moderately active (11%). A range of unsym. NHC precursors were prepared and evaluated. The ligand precursor containing one 2,6-diisopropylphenyl and one 2,6-diethylphenyl afforded the coupling product in 47% yield, clearly suggesting a direct relationship between the steric topog. created by the flanking N-substituents and catalyst activity. Under optimal conditions, a number of alkyl bromides and alkylzinc halides possessing common functional groups (amide, nitrile, ester, acetal, and alkyne) were effectively coupled (61-92%). It is noteworthy that β-substituted alkyl bromides and alkylzinc halides successfully underwent cross-coupling. Also, under these conditions alkyl chlorides were unaffected. In the part of experimental materials, we found many familiar compounds, such as 1-(2,6-Diisopropylphenyl)-3-mesityl-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 866926-59-2Product Details of 866926-59-2)

1-(2,6-Diisopropylphenyl)-3-mesityl-4,5-dihydro-1H-imidazol-3-ium chloride(cas: 866926-59-2) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies. Product Details of 866926-59-2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Recommanded Product: 372147-50-7On October 5, 2001 ,《Heterocyclization of Functionalized Vinylic Derivatives of Imidazo[1,2-a]pyridines》 was published in Journal of Organic Chemistry. The article was written by Chezal, Jean M.; Moreau, Emmanuel; Delmas, Gregory; Gueiffier, Alain; Blache, Yves; Grassy, Gerard; Lartigue, Claire; Chavignon, Olivier; Teulade, Jean C.. The article contains the following contents:

Heterocyclization of functionalized vinylic derivatives of imidazo[1,2-a]pyridines was explored exptl. and theor. using semiempirical AM1 and ab initio methods. A range of functionalized vinylic derivatives (azido, amino, and carbodiimide groups) were prepared for conversion into pyrroloazaindoles, imidazo[1,x]-, (x = 5, 6, 7, 8), [2,6]-, and [2,7]naphthyridines by thermal reaction. In the case of vinylic groups in the 5 position, peri annulation also was observed The exptl. and theor. data are compared and discussed. The results came from multiple reactions, including the reaction of Imidazo[1,2-a]pyridine-5-carbaldehyde(cas: 372147-50-7Recommanded Product: 372147-50-7)

Imidazo[1,2-a]pyridine-5-carbaldehyde(cas: 372147-50-7) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. Recommanded Product: 372147-50-7 In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

《Thiolate Bridged Gold(I)-NHC Catalysts: New Approach for Catalyst Design and its Application to Trapping Catalytic Intermediates》 was published in Chemistry – A European Journal in 2019. These research results belong to Visbal, Renso; Herrera, Raquel P.; Gimeno, M. Concepcion. Category: imidazoles-derivatives The article mentions the following:

New dinuclear N-heterocyclic carbene gold complexes [[(NHC)Au]2(μ-SC6F5)][OTf] (5-8; NHC = IPr, SIPr, IMes, SIMes) with bridging thiolate ligands have been designed as catalytic precursors with desired properties such as stability, recyclability and that do not require additives. The dinuclear compounds 5-8 could slowly release the active catalytic species [Au(NHC)]+ and the precursor [Au(SC6F5)(NHC)] in solution, which means that both species would remain stable throughout the catalytic cycle and the pre-catalyst could easily be recovered. The properties exhibited by the complexes have been taken advantage of to gain new insights on the gold-catalyzed hydroalkoxylation of alkynes, with the aim of clarifying all the steps of the catalytic cycle, together with the characterization of intermediates and final products. Isolation and characterization of the pure final spiroketals and the thermodn. intermediate have been achieved for the first time. Moreover, the kinetic intermediate has also been detected for the first time. In the experimental materials used by the author, we found Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2Category: imidazoles-derivatives)

Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. Category: imidazoles-derivatives In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem