Tag: 100-200

Universal and low energy-demanding platform to produce propylene carbonate from CO₂ using hydrophilic ionic liquids was written by Hernandez, Elisa;Santiago, Ruben;Belinchon, Alejandro;Maria Vaquerizo, Gema;Moya, Cristian;Navarro, Pablo;Palomar, Jose. And the article was included in Separation and Purification Technology in 2022.Related Products of 35487-17-3 This article mentions the following:

Ionic liquids (ILs) have been extensively proposed as efficient catalysts to promote CO₂ cycloaddition reaction to epoxides for producing cyclic carbonates. Recently, liquid-liquid extraction with water as an enhancer approach to regenerate ILs and to purify the product was proposed, since it reduces energy consumption and enhances the neat catalytic activity of the IL due to hydroxyl groups of water. In this work, a comprehensive sample of homogeneous IL catalysts proposed in the literature is exptl. evaluated both in the catalytic step and in its separation by liquid-liquid extraction with water, to demonstrate the universality of the proposed reaction-separation proposal for hydrophilic ILs. Then the complete processes for CO₂ conversion to propylene carbonate were modelled using Aspen Plus to compare the catalyst/product separation efficiency and the specific energy consumption using liquid-liquid extraction and distillation-based platforms. The energy consumption is significantly lower using liquid-liquid platform (1.1-1.3 kWh/kg_PC) than distillation one (2.4-3.1 kWh/kg_PC). It is concluded that hydrophilic ionic liquids, as those formed by [EtOHmim] cation and halide anions, are promising catalysts since they allow: (i) reducing the process energy consumption due to their high catalytic activity and (ii) full catalyst recovering, even at high catalyst loadings, by improving the water extractive properties for IL separation from PC. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Related Products of 35487-17-3).

1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. 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.Related Products of 35487-17-3

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Formation constants of metal complexes of substituted benzimidazoles with different bivalent metal ions was written by Murthy, A. Krishna;Lingaiah, P.. And the article was included in Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical & Analytical in 1984.COA of Formula: C8H8N2 This article mentions the following:

The formation constants of the complexes of 4 (or 7)-methylbenzimidazole, 2-(2′-hydroxyphenyl)benzimidazole, 2-(2′-hydroxy-5′-bromophenyl)benzimidazoles, 2-(2′-hydroxy-3′-methoxy)benzimidazole, 2-(1′-hydroxyethyl)benzimidazole with Mn(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) were determined pH-metrically at different ionic strengths, temperatures, and in solutions of varying dielec. constant The results show that the metal ion reacts with the neutral ligand in the 1st stage and with the anionic ligand in the second stage. In the experiment, the researchers used many compounds, for example, 7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6COA of Formula: C8H8N2).

7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6) belongs to imidazole derivatives. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3–C6) is higher than in water and generally decreases with a 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: C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Examining the unique retention behavior of volatile carboxylic acids in gas chromatography using zwitterionic liquid stationary phases was written by Nan, He;Kuroda, Kosuke;Takahashi, Kenji;Anderson, Jared L.. And the article was included in Journal of Chromatography A in 2019.Safety of 1-Octyl-1H-imidazole This article mentions the following:

For the first time, gas chromatog. (GC) stationary phases consisting of zwitterionic liquids (ZILs) possessing sulfonate functional groups were utilized for the anal. of volatile carboxylic acids (VCAs). The highly polar and acidic nature of VCAs significantly limits the number of currently available GC stationary phases, which are all largely based on acid-modified polyethylene glycol. In this study, it is shown that this class of ZILs exhibit strong retention of VCAs with excellent peak symmetry. Unique chromatog. selectivity toward VCAs is also demonstrated by tuning the structural features of the ZILs. The solvation properties of the three ZILs as well as a structurally similar conventional monocationic IL were characterized using the Abraham solvation parameter model. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7Safety of 1-Octyl-1H-imidazole).

1-Octyl-1H-imidazole (cas: 21252-69-7) 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 has been usedin the lysis, wash and elution buffer for the purification of histidine tagged Sonic Hedgehog(shh-N) protein, in elution buffer in stepwise gradient for the purification of histidine tagged aldo keto reductases using nickel affinity chromatography, as a component of homogenization buffer for the purification of phagosomal compartments from dendritic cells.Safety of 1-Octyl-1H-imidazole

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Microfibers of embellished cobalt-zeolite imidazole framework for vitamin-B2 detection was written by Girija, S.;Sankar, S. Sam;Kundu, Subrata;Wilson, J.. And the article was included in Journal of the Electrochemical Society in 2020.Product Details of 1632-83-3 This article mentions the following:

Co-Zeolite Imidazole Framework (Co-ZIF) microfibers were synthesized by electrospinning method used for the quantification of Riboflavin (RF). Co ions are tethered uniformly along the surface of the ZIF by electrostatic attraction. Crystalline Co ions are interconnected with ZIFs, which makes strongly bonded tetrahedral structure of Co-ZIF providing the improved stability in the composite. The cyclic voltammetric profile reveals, excellent catalytic behavior of the electrodes and the linear plot evidences for interfacial electron transfer of RF to Co-ZIF microfiber modified GCE surface. A selective determination of RF with the linear range of 100 nM to 1 mM with the low limit detection of 81 nM by square wave voltammetry (SWV) technique is demonstrated. The developed RF sensor shows anti-interference ability towards other electroactive species and it was successfully employed toward the real sample for the detection of RF with good recovery result. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3Product Details of 1632-83-3).

1-Methylbenzimidazole (cas: 1632-83-3) belongs to imidazole derivatives. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3–C6) is higher than in water and generally decreases with a Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.Product Details of 1632-83-3

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Modification of Yttrium Silyl-Bridged Amide Alkyl Complexes through Si-H/C-H Cross-Dehydrocoupling of Silanes with a Silylamino Ligand: Synthesis, Reactivity, and Mechanism was written by You, Qing;Zhang, Jie;Zhou, Xigeng. And the article was included in Chemistry – A European Journal in 2020.COA of Formula: C8H8N2 This article mentions the following:

A new method for the modification of a silylamino ligand was developed through mono and dual C(sp³)-H/Si-H cross-dehydrocoupling with silanes. The reaction of [LY{η²-(C,N)-CH₂Si(Me₂)NSiMe₃}] (L = bis(2,6-diisopropylphenyl)-β-diketiminato, L’ (2^L’); L = Tp^Me2 (2^TpMe2)). Also, 1^TpMe2 reacted with the secondary silanes Ph₂SiH₂ and Et₂SiH₂ to afford the corresponding mono C-H activation products [Tp^Me2Y{η²-(C,N)-CH(SiHR₂)Si(Me₂)NSiMe₃}] (R = Ph (4b); R = Et (4c)). The equimolar reaction of 1^TpMe2 with PhSiH₃ also produced the mono C-H activation product 4a ([Tp^Me2Y{η²-(C,N)-CH(SiH₂Ph)Si(Me₂)NSiMe₃}(THF)]). A study of their reactivity showed that 4a facilely reacted with 2 equiv of benzothiazole by an unusual 1,1-addition of the C:N bond of the benzothiazolyl unit to the Si-H bond to give the C-H/Si-H cross-dehydrocoupling product [(Tp^Me2)Y{η³-(N,N,N)-N(SiMe₃)SiMe₂CH₂Si(Ph)(CSC₆H₄N)(CHSC₆H₄N)}] (5). This modification endows the silylamino ligand with novel reactivity. 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. The solubility of imidazoles in ethers is lower than that in alcohols and decreases with increasing chain length of the ethers . In contrast, the solubility of benzimidazoles in alcohols (C3–C6) is higher than in water and generally decreases with a Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.COA of Formula: C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The Role of the Cation in the Solvation of Cellulose by Imidazolium-Based Ionic Liquids was written by Rabideau, Brooks D.;Agarwal, Animesh;Ismail, Ahmed E.. And the article was included in Journal of Physical Chemistry B in 2014.Category: imidazoles-derivatives This article mentions the following:

We present a systematic mol. dynamics study examining the roles of the individual ions of different alkylimidazolium-based ionic liquids in the solvation of cellulose. We examine combinations of chloride, acetate, and dimethylphosphate anions paired with cations of increasing tail length to elucidate the precise role of the cation in solvating cellulose. In all cases we find that the cation interacts with the nonpolar domains of cellulose through dispersion interactions, while interacting electrostatically with the anions bound at the polar domains of cellulose. The structure and dimensions of the imidazolium head facilitate the formation of large chains and networks of alternating cations and anions that form a patchwork, satisfying both the polar and nonpolar domains of cellulose. A subtle implication of increasing tail length is the dilution of the anion concentration in the bulk and at the cellulose surface. We show how this decreased concentration of anions in the bulk affects hydrogen bond formation with cellulose and how rearrangements from single hydrogen bonds to multiple shared hydrogen bonds can moderate the loss in overall hydrogen bond numbers Addnl., for the tail lengths examined in this study we observe only a very minor effect of tail length on the solvation structure and overall interaction energies. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Category: imidazoles-derivatives).

1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) 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. Category: imidazoles-derivatives

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Visible light mediated C-H trifluoromethylation of (hetero)arenes was written by Xiao, Fang;Lin, Jin-Hong;Hao, Fei;Zheng, Xing;Guo, Yu;Xiao, Ji-Chang. And the article was included in Organic Chemistry Frontiers in 2022.Formula: C7H9N3O4 This article mentions the following:

A protocol for visible light mediated C-H trifluoromethylation of unactivated (hetero)arenes under blue LED irradiation has been developed. The reaction enables the rapid construction of a range of CF₃-containing (hetero)arenes in moderate to high yields from the readily accessible trifluoromethylsulfonyl-pyridinium salt (TFSP). This protocol is also suitable for nitrogen-containing aromatic heterocycles, which are potentially useful in medicinal chem. In the experiment, the researchers used many compounds, for example, Ethyl 1-methyl-4-nitro-1H-imidazole-2-carboxylate (cas: 109012-23-9Formula: C7H9N3O4).

Ethyl 1-methyl-4-nitro-1H-imidazole-2-carboxylate (cas: 109012-23-9) belongs to imidazole derivatives. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Formula: C7H9N3O4

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Silver-catalyzed regioselective deuteration of (hetero)arenes and α-deuteration of 2-alkyl azaarenes was written by Dong, Baobiao;Cong, Xuefeng;Hao, Na. And the article was included in RSC Advances in 2020.COA of Formula: C8H8N2 This article mentions the following:

A simple silver-catalyzed regioselective deuteration of (hetero)arenes and α-deuteration of 2-alkyl azaarenes was described. This strategy provides an efficient and practical avenue to access various deuterated electron-rich arenes, azaarenes and α-deuterated 2-alkyl azaarenes with good to excellent deuterium incorporation utilizing D2O as the source of deuterium atoms. 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. 1H-imidazole is an imidazole tautomer which has the migrating hydrogen at position 1. It is a conjugate base of an imidazolium cation. It is a conjugate acid of an imidazolide. It is a tautomer of a 4H-imidazole. 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

CO₂-responsive Pickering emulsions stabilized by in-situ generated ionic liquids and silica nanoparticles was written by Shi, Yunlei;Xiong, Dazhen;Chen, Yongkui;Wang, Huiyong;Wang, Jianji. And the article was included in Journal of Molecular Liquids in 2019.Electric Literature of C11H20N2 This article mentions the following:

Stimuli-responsive Pickering emulsions have attracted increasing interest because of the advantages of applications in numerous industrial processes. In this work, Pickering emulsions have been obtained by using neg. charged silica nanoparticles in association with very small amount of CO₂-responsive ionic liquids as stabilizer. Ionic liquids N-alkylimidazole bicarbonates ([C_ni.m.]⁺HCO^–₃, n = 6, 8, 10, 12, 14) are in-situ generated by bubbling CO₂ into aqueous solution of N-alkylimidazoles (C_ni.m., n = 6, 8, 10, 12, 14), and this process is reversible by removal of CO₂ with bubbling of N₂. Thus the Pickering emulsions may be switched multiple times between emulsification and demulsification states by alternatively bubbling and removal of CO₂ at 25°C. The effect of concentration and alkyl chain length of [C_ni.m.]⁺HCO^–₃ on Pickering emulsions is investigated systematically, and the possible mechanism of CO₂-responsive Pickering emulsion is also studied by conductivity, surface tension, zeta potential, adsorption isotherm, water contact angle and ¹³C NMR spectroscopy. This CO₂-responsive Pickering emulsion is cheap, simple, eco-friendly, and may have potential applications in emulsification and demulsification. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7Electric Literature of C11H20N2).

1-Octyl-1H-imidazole (cas: 21252-69-7) 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 derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.Electric Literature of C11H20N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Substituent effects on carbon-13 chemical shifts of aromatic carbons in β-O-4 and β-5 type lignin model compounds was written by Hassi, H. Y.;Aoyama, M.;Tai, D.;Chen, C. L.;Gratzl, J. S.. And the article was included in Journal of Wood Chemistry and Technology in 1987.Computed Properties of C6H8N2O This article mentions the following:

Substituent effects on the chem. shifts of aromatic carbons in lignin model compounds were elucidated from ¹³C NMR spectra of guaiacyl and syringyl type monomeric and β-O-4 model compounds and guaiacyl type β-5 model compounds Evaluation of the observed values of substituent chem. shift (SCS) for the aromatic carbons leads to elucidation of a generalized SCS additivity rule, for estimation of the chem. shifts of aromatic carbons in ring A of β-O-4 and β-5 type substructures in model compounds and in ring B of β-O-4 substructures in lignin preparations, with errors of <1 ppm. The rule is applicable to substructures of both guaiacyl and syringyl types, using an appropriate parent compound as reference instead of C₆H₆. Signals in the aromatic region of the ¹³C NMR spectra of β-O-4 and β-5 type model compds are reassigned on the basis of the observed SCSs, as well as APT spectra (Patt, S. L.; Shoorley, J., 1982) of the compounds In the experiment, the researchers used many compounds, for example, 1-(1-Methyl-1H-imidazol-2-yl)ethanone (cas: 85692-37-1Computed Properties of C6H8N2O).

1-(1-Methyl-1H-imidazol-2-yl)ethanone (cas: 85692-37-1) 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 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.Computed Properties of C6H8N2O

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem