Tag: 100-200

Iron-catalysed alkene and heteroarene H/D exchange by reversible protonation of iron-hydride intermediates was written by Britton, Luke;Docherty, Jamie H.;Sklyaruk, Jan;Cooney, Jessica;Nichol, Gary S.;Dominey, Andrew P.;Thomas, Stephen P.. And the article was included in Chemical Science in 2022.Quality Control of 1-Methylbenzimidazole This article mentions the following:

The iron-catalyzed C(sp²)-H bond hydrogen/deuterium exchange reaction using CD₃OD is reported for both heterocycles (furan, Imidazole, Benzofuran, etc.) and, for the first time, alkenes (4-tert-Butylstyrene, Undecene, Sclareol, etc.). Isolation and characterization, including by single-crystal X-ray diffraction, of the key iron-aryl and iron-alkenyl C-H metalation intermediates provided evidence for a reversible protonation of the active iron hydride catalyst. Good chemoselectivity was observed for both substrate classes. The developed procedure is orthogonal to previous iron-catalyzed H/D exchange methods which used C₆D₆, D₂, or D₂O as the deuterium source, and uses only bench-stable reagents, including the iron(II) pre-catalyst. Further, a new mechanism of iron-hydride formation is reported in which β-hydride elimination from an alc. generates the iron hydride. The ability to produce, isolate and characterize the organometallic products arising from C-H activation presents a basis for future discovery and development. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3Quality Control of 1-Methylbenzimidazole).

1-Methylbenzimidazole (cas: 1632-83-3) belongs to imidazole derivatives. 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. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Quality Control of 1-Methylbenzimidazole

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ion-pair solid-phase extraction of trace amounts of ionic liquid cations in fresh and seawater samples was written by Stepnowski, Piotr;Nichthauser, Joanna. And the article was included in Analytical Sciences in 2008.HPLC of Formula: 79917-89-8 This article mentions the following:

The usefulness of ion-pair reagents in selective solid reversed-phase extraction of one N-butyl-4-methylpyridinium and 4 short-chain alkylimidazolium ionic liquid cations from aqueous media was studied using various concentrations of alkylsulfonates with different alkyl chain lengths. Final recoveries of the 2 cations with the shortest alkyl residues were poorer than those of the other, more hydrophobic compounds The recovery values were little affected by the different concentrations of the reagents. In nearly all cases, the best recoveries were obtained with the 1-heptanesulfonate reagent. The anal. performance parameters included excellent linearity over 4 orders of magnitude, with limits of detection 0.01-0.06 ppm, and very good precision and accuracy. The method was used to extract ionic liquids from spiked seawater and freshwater samples. Recoveries and limits of detection were quite similar to those obtained with preconcd. standard solutions In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8HPLC of Formula: 79917-89-8).

1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Imidazole is the basic core of some natural products such as histidine, purine, histamine and DNA based structures, etc. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.HPLC of Formula: 79917-89-8

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

A New Model for Prediction of One Electron Reduction Potential of Nitroaryl Compounds was written by Fareghi-Alamdari, Reza;Zandi, Farzad;Keshavarz, Mohammad Hossein. And the article was included in Zeitschrift fuer Anorganische und Allgemeine Chemie in 2015.COA of Formula: C5H5N3O4 This article mentions the following:

This paper introduces a simple model for prediction of one electron reduction potential [E(RNO₂/R^•NO₂^–)] of various nitroaryl compounds The new method uses energy difference between HOMO (HOMO) and LUMO (LUMO) in gas phase at the B3LYP/6-311++G** level (ΔE_HOMO-LUMO) and some structural parameters. It was used for 35 nitroaryl compounds including nitrobenzenes, nitrofurans, 2-nitroimidazoles, 4-nitroimidazoles, 5-ninuintidazoles, nitroazaindoles, nitroacridines, and miscellaneous nitroaryl compounds The root mean square (rms) percent deviation and the average absolute error of predictions of E(RNO₂/R^•NO₂^–) relative to experiment were decreased from 12.4 % and 0.42 V to 3.5 % and 0.11 V, resp., upon consideration of several structural parameters. Increment of the value of ΔE_HOMO-LUMO and inclusion of specific polar groups can increase thermodn. stability of these compounds In the experiment, the researchers used many compounds, for example, 2-(2-Nitro-1H-imidazol-1-yl)acetic acid (cas: 22813-32-7COA of Formula: C5H5N3O4).

2-(2-Nitro-1H-imidazol-1-yl)acetic acid (cas: 22813-32-7) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.COA of Formula: C5H5N3O4

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ligand-Promoted Rh^I-Catalyzed C2-Selective C-H Alkenylation and Polyenylation of Imidazoles with Alkenyl Carboxylic Acids was written by Zhao, Haoqiang;Luo, Zhenli;Yang, Ji;Li, Bohan;Han, Jiahong;Xu, Lijin;Lai, Wenzhen;Walsh, Patrick J.. And the article was included in Chemistry – A European Journal in 2022.Product Details of 83741-35-9 This article mentions the following:

The first RhI-catalyzed, directed decarbonylative C2-H alkenylation of imidazoles with readily available alkenyl carboxylic acids is reported. The reaction proceeds in a highly regio- and stereoselective manner, providing efficient access to C2-alkenylated imidazoles that are generally inaccessible by known C-H alkenylation methods. This transformation accommodates a wide range of alkenyl carboxylic acids, including challenging conjugated polyene carboxylic acids, and diversely decorated imidazoles with high functional group compatibility. The presence of a removable pyrimidine directing group and the use of a bidentate phosphine ligand are pivotal to the success of the catalytic reaction. This process is also suitable for benzimidazoles. Importantly, the scalability and diversification of the products highlight the potential of this protocol in practical applications. Detailed exptl. and computational studies provide important insights into the underlying reaction mechanism. In the experiment, the researchers used many compounds, for example, 4-Bromo-1H-benzoimidazole (cas: 83741-35-9Product Details of 83741-35-9).

4-Bromo-1H-benzoimidazole (cas: 83741-35-9) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Product Details of 83741-35-9

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

New ionic organic compounds containing a linear tris(imidazolium) core and their thermotropic liquid crystal behavior was written by Schenkel, Magdalene R.;Shao, Renfan;Robertson, Lily A.;Wiesenauer, Brian R.;Clark, Noel A.;Gin, Douglas L.. And the article was included in Liquid Crystals in 2013.Computed Properties of C11H20N2 This article mentions the following:

Imidazolium-containing thermotropic ionic liquid crystals (TILCs) are of interest because of their structural similarity to imidazolium-based ionic liquids (ILs), allowing them to exhibit some IL-like properties in addition to the LC order. More imidazolium units are important for increasing the IL character; however, the effect of multiple imidazolium units on LC behavior is not well known. Most reported imidazolium TILCs contain one imidazolium unit; only a handful containing multiple imidazolium units is known. The only examples of TILCs with multiple imidazolium units sequentially linked with a flexible spacer are based on an alkyl- or oligo(ethylene oxide)-bridged bis(imidazolium) core with an n-alkyl tail at each end. Herein, a series of ten new sym. compounds containing three hexyl-bridged imidazolium bromide units as the core and two terminal alkyl chains was synthesized and analyzed. Thermotropic LC phases were generally not observed for homologs with even-numbered tails less than 16 carbons. However, after initial annealing, the homologs containing 16-carbon, 18-carbon and 20-carbon tails, all form a smectic A phase in the 25-137° range, with the latter two also forming a higher-order smectic phase. This indicates that with sufficiently long alkyl tails to counterbalance the poly(ion) core, these tris(imidazolium) salts can exhibit thermotropic mesomorphism. The title compounds thus formed included a tris[imidazolium] tribromide compound (I) [1,3-bis[6-(1-alkyl-1H-imidazolium-3-yl)hexyl]imidazolium tribromide] and related substances. The synthesis of the target compounds was achieved by a reaction of 1,3-bis(6-bromohexyl)-1H-imidazolium bromide with alkyl bromides. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7Computed Properties of C11H20N2).

1-Octyl-1H-imidazole (cas: 21252-69-7) belongs to imidazole derivatives. 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. This ring system is present in important biological building blocks, such as histidine and the related hormone histamine.Computed Properties of C11H20N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Catalytic Behavior of Au Confined in Ionic Liquid Film: A Kinetics Study for the Hydrochlorination of Acetylene was written by Wang, Bolin;Zhang, Haifeng;Yue, Yuxue;Li, Changlin;Zhao, Jia. And the article was included in Catalysts in 2022.Recommanded Product: 79917-89-8 This article mentions the following:

A systematic study of the kinetics of supported-ionic-liquid-phase (SILP) Au catalysis (Au-IL/AC) has been established in the continuous gas-phase hydrochlorination of acetylene. We reveal that the effect of ionic liquid (IL) film on substrate diffusion can be eliminated. The reaction order of the catalyst indicates that Au is confirmed to exist as a monomer in the IL film of the Au-IL/AC system, which is different from the fast equilibrium of the “Au dimer and monomer” for the classical Au/AC catalyst. The homogeneous reaction micro-environment is confirmed for Au-IL/AC since the activation energy was little changed under both heterogeneous and homogeneous catalysis, further verifying the monat. characteristics of Au in Au-IL/AC. Due to the supported IL film, the reaction order of hydrogen chloride was decreased from 1 to 0.5 while creating a hydrogen chloride enrichment system around Au, which provides the possibility of producing vinyl chloride with an equal substrates feed ratio. This kinetic-perspective-based revelation of the catalytic behavior of the metal active sites confined in IL film enriches and expands the SILP catalytic system for acetylene hydrochlorination. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Recommanded Product: 79917-89-8).

1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Recommanded Product: 79917-89-8

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Electrophilic properties of nitroheterocyclic compounds. was written by Zieba-Mizgala, Anna;Puszko, Aniela;Regiec, Andrzej;Kuduk-Jaworska, Janina. And the article was included in Bioelectrochemistry in 2005.Reference of 3034-41-1 This article mentions the following:

Investigation of the reduction potential and calculation of the partition coefficient n-octanol/water allow the assessment of the potential suitability of nitropyridine N-oxide compounds in radiotherapy of cancer. Experiments were carried out using cyclic voltammetry with HMDE as working electrode. The electrode reduction of the investigated compounds is quite irreversible and strongly dependent on pH. In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Reference of 3034-41-1).

1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Reference of 3034-41-1

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Electrospun nylon 6 nanofibers incorporated with 2-substituted N-alkylimidazoles and their silver(I) complexes for antibacterial applications was written by Kleyi, Phumelele;Frost, Carminita L.;Tshentu, Zenixole R.;Torto, Nelson. And the article was included in Journal of Applied Polymer Science in 2014.Application of 21252-69-7 This article mentions the following:

The article presents the incorporation of biocides [2-substituted N-alkylimidazoles and their silver(I) complexes] into electrospun nylon 6 nanofibers for application as antimicrobial materials. The electrospun nylon 6/biocides nanofiber composites were characterized by IR spectroscopy (ATR-FTIR) and SEM (SEM-EDX). The antimicrobial activity of the electrospun nylon 6/biocides nanofiber composites was evaluated against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis subsp. spizizenii using the disk diffusion method, the American Association for Textile Chemists and Colorists test method 100-2004 and the dynamic shake flask method (American Society for Testing and Materials E2149-10). The electrospun nylon 6 nanofibers incorporated with 2-substituted N-alkylimidazoles displayed moderate to excellent levels of growth reduction against S. aureus (73.2-99.8%). For the electrospun nylon 6 nanofibers incorporated with silver(I) complexes, the levels of growth reduction were >99.99%, for both E. coli and S. aureus, after the antimicrobial activity evaluation using the shake flask method. The study demonstrated that the electrospun nanofibers, fabricated using the incorporation strategy, have the potential to be used as attractive antimicrobial materials. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7Application of 21252-69-7).

1-Octyl-1H-imidazole (cas: 21252-69-7) belongs to imidazole derivatives. 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. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Application of 21252-69-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ligand-free Pd/Ag-mediated dehydrogenative alkynylation of imidazole derivatives was written by Bellina, Fabio;Biagetti, Matteo;Guariento, Sara;Lessi, Marco;Fausti, Mattia;Ronchi, Paolo;Rosadoni, Elisabetta. And the article was included in RSC Advances in 2021.COA of Formula: C8H8N2 This article mentions the following:

A variety of 2-alkynyl(benzo)imidazoles I (R = Ph, n-hexyl, 2-chlorophenyl, etc.; R¹ = R² = H; R¹R² = -CH=CH-CH=CH-) have been synthesized by dehydrogenative alkynation of N-methylimidazole or 1-methyl-1H-1,3-benzodiazole with terminal alkynes RCCH in NMP under air in the presence of Ag₂CO₃ as the oxidant and Pd(OAc)₂ as the catalyst precursor. The data obtained in this study support a reaction mechanism involving a non-concerted metalation deprotonation (n-CMD) pathway. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3COA of Formula: C8H8N2).

1-Methylbenzimidazole (cas: 1632-83-3) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole based anticancer drug find applications in cancer chemotherapy. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC).COA of Formula: C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthesis and properties of amides of 2-[(4-methylphenyl)(2-thienylsulfonyl)amino]acetic acid was written by Tyuneva, I. V.;Filimonov, S. I.;Balakin, K. V.;Skorenko, A. V.;Kravchenko, D. V.;Dorogov, M. V.. And the article was included in Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya in 2004.Recommanded Product: 24134-26-7 This article mentions the following:

A series of [(4-methylphenyl)(2-thienylsulfonyl)amino]acetamides I (R¹ = H, R² = cyclopentyl, 2-ClC₆H₄CH₂, PhCHMe, 4-ClC₆H₄CH₂CH₂, etc.; R¹R²N = 4-benzyl-1-piperidinyl, 2,3-dihydro-1-indolyl, etc.) was synthesized by reaction of 2-thiophenesulfonyl chloride with Me (4-methylphenylamino)acetate followed by the ether group hydrolysis and amination with various primary and secondary amines. Some important physico-chem. properties of I, such as partition coefficient, solubility, amount of non-terminal rotating bonds and the total number of hydrogen bond donors and acceptors, were calculated In the experiment, the researchers used many compounds, for example, 2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7Recommanded Product: 24134-26-7).

2,3-Dihydro-1H-benzo[d]imidazo[1,2-a]imidazole (cas: 24134-26-7) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Recommanded Product: 24134-26-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem