Tag: M.W=150-200

Estenne, Genevieve published the artcileAn efficient synthesis of chlorinated imidazoles through tert-butyldimethylsiloxy derivatives, COA of Formula: C8H13ClN2O, the publication is Journal of Heterocyclic Chemistry (1994), 31(5), 1121-3, database is CAplus.

The protection of 2-substituted imidazole-5-methanol derivatives by a tert-butyldimethylsilyl group allowed the chlorination of the heterocycle in position 4 with good yield whereas direct chlorination of the imidazole alc. was unsuccessful. The preparation of 4-chloroimidazole derivative I was described.

Journal of Heterocyclic Chemistry published new progress about 79047-41-9. 79047-41-9 belongs to imidazoles-derivatives, auxiliary class Imidazole,Chloride,Alcohol, name is (2-Butyl-4-chloro-1H-imidazol-5-yl)methanol, and the molecular formula is C8H13ClN2O, COA of Formula: C8H13ClN2O.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Majdan-Cegincara, Roghayeh published the artcileEffect of 1-Butyl-1-methylpyrrolidinium trifluoromethanesulfonate on water activity of ternary aqueous ionic liquid solutions containing [BMIm]Br, [BMIm]Cl, [HMIm]Br, and [HMIm]Cl, at 298.15 K, HPLC of Formula: 79917-90-1, the publication is Journal of Chemical Thermodynamics (2022), 106858, database is CAplus.

In improved isopiestic method, the effect of 1-Bu 1-methylpyrrolidinium trifluoromethanesulfonate ([BMP][TfO]) on the activity of water of aqueous solutions of 1-Bu 3-Me imidazolium bromide ([BMIm]Br), 1-Bu 3-Me imidazolium chloride ([BMIm]Cl), 1-hexyl 3-Me imidazolium bromide ([HMIm]Br), and 1-hexyl 3-Me imidazolium chloride ([HMIm]Cl) was determined Some quantities of vapor liquid equilibrium were calculated from the exptl. values. The activity coefficients of [BMIm]Br, [BMIm]Cl, [HMIm]Br, and [HMIm]Cl in binary and ternary systems were calculated by the results obtained from correlating the activity of water measured in these systems with TNRF-mNRTL local composition based model. Through it, the transfer of these ionic liquids from water to aqueous ternary solutions containing [BMP][TfO] was investigated with respect to the transfer Gibbs energy. The interactions between solute and solvent were highlighted using the transfer Gibbs energy, water activity and partial pressure of water data.

Journal of Chemical Thermodynamics published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, HPLC of Formula: 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Popov, I. I. published the artcileTransformations of 2-(α-chloroalkyl)benzimidazoles, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1993), 664-72, database is CAplus.

Phase-transfer dehydrochlorination/cyclodimerization of title compounds I (X = Cl: R = H, Me) in water-DMSO system afforded pyrazinobis(benzimidazole)s II in 96 and 93% yields, resp. II (R = Me) was similarly obtained (in 76% yield) via dehydration/cyclodimerization of I (X = OH, R = Me) in polyphosphoric or sulfuric acid; I (X = OH, R = H) was inert under the reaction conditions. II (R = H) was obtained in 90% yield via diazotization of I (X = NH₂, R = H). Phase-transfer dehydrochlorination of (chloromethyl)benzimidazole III using DMF or EtOH afforded the corresponding carbene-derived products IV (R¹ = NMe₂, OEt, resp.). Phase-transfer dehydrochlorination of (chloromethyl)benzimidazoles (using DMSO) in presence of β-diketones MeCOCH₂COR (R = Me, Ph) afforded pyrrolobenzimidazoles V (R¹ = H, Me).

Khimiya Geterotsiklicheskikh Soedinenii published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Popov, I. I. published the artcile(1-Methylbenzimidazo-2-yl)carbene. Reaction of 1-methyl-2-(chloromethyl)benzimidazole with nucleophiles, Computed Properties of 4760-35-4, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1989), 1422, database is CAplus.

Treating 2-(chloromethyl)-1-methylbenzimidazole (I) with aqueous NH₃ in the presence of 40% aqueous NaOH gave 2-(aminomethyl)-1-methylbenzimidazole. Under phase-transfer catalyzed conditions (50% NaOH, Et₃(PhCH₂)N⁺Cl^–) in Me₂CO or DMSO pyrazinobisbenzimidazole II was formed, but in DMF or EtOH 2-(dimethylamino)- and 2-ethoxy-1-methylbenzimidazoles were obtained, resp.

Khimiya Geterotsiklicheskikh Soedinenii published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Computed Properties of 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Popov, I. I. published the artcileReaction of 2-(chloromethyl)benzimidazoles with acetylacetone and benzoylacetone. Acidic cleavage of substituted β-diketones, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1996), 1067-1071, database is CAplus.

The title reactions gave benzimidazolyl ketones I (R = R¹ = Me; R = Ph, R¹ = H, Me). When 2-(chloromethyl)benzimidazole reacted with acetylacetone, the product was the pyrrolobenzimidazole II.

Khimiya Geterotsiklicheskikh Soedinenii published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Cao, Mengyan published the artcileIonic Liquid-Assisted Fast Synthesis of Carbon Dots with Strong Fluorescence and Their Tunable Multicolor Emission, Synthetic Route of 79917-90-1, the publication is Small (2022), 18(11), 2106683, database is CAplus and MEDLINE.

Conventional synthesis of carbon dots (CDs) mostly involves a hydrothermal or solvent-thermal reaction which needs relatively high temperature and pressure. In this work, ionic liquid is used to assist in fast synthesizing CDs with an ultrahigh photoluminescent quantum yield (98.5%) by heating at a low temperature (≤100°C) and at atm. pressure. In addition, through this approach, tunable multicolor emissive CDs can be successfully achieved and used for preparing high-performance white light-emitting diodes. Theor. computation proves that the activity of synthesis reaction can be significantly enhanced by ionic liquids D. functional theory calculation reveals that the size and graphite nitrogen ratios of CDs have an effect on bandgap reduction, resulting in a red shift of the emission, which is in good agreement with the exptl. results. This simple and promising approach for fast synthesis of tunable emissive CDs using ionic liquid affords the facilitation of CDs-based luminescent materials for fast manufacturing of functional devices.

Small published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Synthetic Route of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Ma, Yingchong published the artcileRheological Characterization of Mixed Aqueous Solutions of Enzymatic Hydrolysis Lignin and Ionic Liquid, Quality Control of 79917-90-1, the publication is ChemistrySelect (2022), 7(21), e202200020, database is CAplus.

Here we present a rheol. study of enzymic hydrolysis lignin (EH lignin) in 1-butyl-3-methylimidazolium chloride ([C₄min]Cl) aqueous solutions The effects of ionic liquid mass fraction, shear rate and temperature on the viscosity and macromol. chain configuration of EH lignin / [C₄min] Cl aqueous solution were studied. The results showed that the viscosity of the aqueous solutions increased with the increase of lignin content. The mass percentages of overlapping and winding, responding to divisions of lignin macromols. existence state, were varied with changing in the temperature and mass percentages of ionic liquid Increasing the mass of ionic liquid will significantly change the viscosity of lignin solution Most of the lignin solutions had shear thinning behavior, suggesting that macromol. chains of lignin moved with orientation to the fluid, and disentangled under the shear force. The viscosity of lignin solution decreased with the increase of temperature, and the viscosity activation energy increased with the increase of lignin or ionic liquid mass fraction.

ChemistrySelect published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Quality Control of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Mutti, Francesco G. published the artcileBiomimetic modelling of copper enzymes: synthesis, characterization, EPR analysis and enantioselective catalytic oxidations by a new chiral trinuclear copper(II) complex, Category: imidazoles-derivatives, the publication is European Journal of Inorganic Chemistry (2009), 554-566, database is CAplus.

The new octadentate ligand (R)-(+)-N,N’-dimethyl-N,N’-bis{-2-[bis(1-methyl-2-benzimidazolylmethyl)]-2-methyl-aminoethyl}-1,1′-binaphthyl-2,2′-diamine [(R)-(+)-DABN-L-Ala-Bz₄; L] was employed for the synthesis of dinuclear and trinuclear copper(II) complexes. The ligand design is based on the insertion of chiral residues derived from L-alanine between the diaminobinaphthyl (R)-(+)-DABN spacer and the aminobis(benzimidazole) metal binding units. The chiroptical properties of the ligand and the complexes are described. EPR experiments were performed on [Cu₂L]⁴⁺ and [Cu₃L]⁶⁺ at low temperatures In the case of [Cu₂L]⁴⁺, a weak dipolar interaction between the two spin centers was found. A similar weak spin interaction occurred in the trinuclear copper cluster, which could be treated likewise as a weakly coupled three-spin system. The anal. was substantiated by studying the complex EPR temperature behavior, where population of the quartet state occurred only at high temperature (77 K), whereas at cryogenic temperatures (4 K) the system adopted a doublet state as a ground-state spin configuration. Titration with sodium azide of [Cu₂L]⁴⁺ was consistent with terminal binding of one N₃^– mol. to each copper ion. Furthermore, dipolar interactions between spin centers were strongly suppressed in this case. For [Cu₃L]⁶⁺, the adduct formed by the interaction with two azido mols. induced formation of a μ-azido bridges among the three Cu²⁺ ions and led to population of the quartet state even at cryogenic temperatures This bridged configuration was, however, lost upon further addition of azido mols. The copper(II) complexes were tested as catalysts in the oxidation of biogenic catechols and flavonoids by dioxygen to give the corresponding quinones, which were trapped as adducts with MBTH. The dinuclear complex [Cu₂L]⁴⁺ displays poor substrate enantiodifferentiating ability, even though it exhibits catalytic activity comparable to that of [Cu₃L]⁶⁺. The trinuclear complex [Cu₃L]⁶⁺ exhibits significant enantioselectivity in the oxidations of the catecholamines L-/D-DOPA Me ester and L-/D-norepinephrine. The origin of this enantioselectivity must be associated with the mode of substrate binding, as it depends almost entirely on K_m.

European Journal of Inorganic Chemistry published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Category: imidazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Domanski, Michal published the artcileTunable Microwave Flow System for Scalable Synthesis of Alkyl Imidazolium-type Ionic Liquids, HPLC of Formula: 79917-90-1, the publication is Organic Process Research & Development (2022), 26(8), 2498-2509, database is CAplus.

A continuous flow auto-frequency tuning single-mode microwave reactor is disclosed as a powerful platform to synthesize alkyl imidazolium salts, e.g., I and II, as ionic liquids/ionic liquid precursors in up to near-quant. yields, 100-600 g h^-1 productivities with record space-time yields. Challenges faced, including viscosity changes, dielec. property changes, and phase separation, were addressed by different operation modes of the reactor without reactor redesigning. Depending on the purpose, this highly productive method could prove to be useful for intensive applications of ionic liquids

Organic Process Research & Development published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, HPLC of Formula: 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Tan, Shuai published the artcileTuning the Charge and Hydrophobicity of Graphene Oxide Membranes by Functionalization with Ionic Liquids at Epoxide Sites, Quality Control of 79917-90-1, the publication is ACS Applied Materials & Interfaces (2022), 14(16), 19031-19042, database is CAplus and MEDLINE.

Functionalization of graphene oxide (GO) membranes is generally achieved using carboxyl groups as binding sites for ligands. Herein, by taking advantage of the ability of imidazolium-based ionic liquids (ILs) to undergo an epoxide ring-opening reaction, a new approach of GO modification was established, in which ILs were bonded to the abundant epoxides on GO without sacrificing the carboxyl groups. Computational methods confirmed this unique configuration of ILs on GO, which enabled the dispersion of IL/GO flakes in water for facile casting into laminate membranes. Compared with neat GO, the ILs in IL/GO membranes served as spacers that substantially reduced the multi-valent cation mobility, simultaneously facilitated ion desolvation, and increased the water flux across the membrane. Our studies found that the higher separation efficiency of IL/GO membranes may be attributed to the synergistic modification of the hydrophobicity and surface charge. Specifically, the protonated nitrogen of the imidazolium cations altered the surface charge of GO, thereby generating electrostatic repulsion that enhanced the selectivity of cation rejection. On the other hand, the increased length of the alkyl chains bound to the imidazolium rings was found to increase the hydrophobicity of GO, which, in turn, aided the fine-tuning of the water desolvation/transport dynamics at the GO/IL interface to achieve a high water flux. Addnl., the water retention was reduced on the hydrophobic planes, which inhibited GO swelling during aqueous separations Mol. dynamics simulations revealed increased water diffusivity when ILs were intercalated within GO layers. We establish that without requiring a high energy input, functionalization of GO membranes with ILs may be a promising approach to achieve efficient ion separation and critical material recovery.

ACS Applied Materials & Interfaces published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H11BO2, Quality Control of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem