Tag: 100-200

Adsorption and thermodynamic properties of dissymmetric gemini imidazolium surfactants with different spacer length was written by Zhao, Xiaohui;An, Dong;Ye, Zhiwen. And the article was included in Journal of Dispersion Science and Technology in 2017.HPLC of Formula: 21252-69-7 This article mentions the following:

A series of dissym. gemini imidazolium surfactants with different spacer length ([C_mC_sC_ni.m.]Br₂, m + n = 24, m = 12, 14, 16, 18; s = 2, 4, 6) were synthesized and characterized by ₁H NMR and ESI-MS spectroscopy. Their adsorption and thermodn. properties were investigated by the surface tension and elec. conductivity methods. Consequently, the surface activity parameters (cmc, γ_cmc, π_cmc, pC₂₀, cmc/C₂₀, Γ_max, A_min) and thermodn. parameters (Δ;G_m^θ, ΔH_m^θ, ΔS_m^θ) were obtained. The effects of the dissymmetry (m/n) and the spacer length (s) on the surface activity and micellization process of surfactants have been discussed in detail. In the experiment, the researchers used many compounds, for example, 1-Octyl-1H-imidazole (cas: 21252-69-7HPLC of Formula: 21252-69-7).

1-Octyl-1H-imidazole (cas: 21252-69-7) 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.HPLC of Formula: 21252-69-7

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Iron-catalyzed [3+2]-cycloaddition of in situ generated N-ylides with alkynes or olefins: access to multi-substituted/polycyclic pyrrole derivatives was written by Zhou, Kai;Bao, Ming;Huang, Jingjing;Kang, Zhenghui;Xu, Xinfang;Hu, Wenhao;Qian, Yu. And the article was included in Organic & Biomolecular Chemistry in 2020.COA of Formula: C8H8N2 This article mentions the following:

An iron-catalyzed one-pot three-component reaction of 1-substituted benzimidazoles with diazoacetates and electron-deficient alkynes or alkenes has been reported. Mechanistically, the reaction goes through a 1,3-dipolar cycloaddition of catalytically generated benzimidazolium N-ylides with various activated alkynes or alkenes, leading to multi-substituted and polycyclic fused pyrrole derivatives, resp. 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. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. 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.COA of Formula: C8H8N2

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Consistency test of solubility data of ammonia in ionic liquids using the modified Peng-Robinson equation of Kwak and Mansoori was written by Faundez, Claudio A.;Diaz-Valdes, Joaquin F.;Valderrama, Jose O.. And the article was included in Fluid Phase Equilibria in 2013.Safety of 1-Methyl-1H-imidazol-3-ium chloride This article mentions the following:

Phase equilibrium data of temperature, pressure and solubility (T-P-x) of ammonia in different types of ionic liquids over wide ranges of temperatures and pressures are modeled and tested for thermodn. consistency. The modified Peng-Robinson equation of state proposed by Kwak and Mansoori is used for correlating the isothermal PX data and a flexible thermodn. consistency method applied to analyze forty seven isothermal P-x data available in the open literature. Modeling is found acceptable in all cases, meaning that deviations in correlating the data are low, proving at the same time the claimed flexibility of a well-founded model that uses simple van der Waals mixing rules. For all cases, the thermodn. consistency method gives a clear conclusion about consistency or inconsistency of a set of exptl. T-P-x data based on the established criteria. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3Safety of 1-Methyl-1H-imidazol-3-ium chloride).

1-Methyl-1H-imidazol-3-ium chloride (cas: 35487-17-3) 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 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-Methyl-1H-imidazol-3-ium chloride

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

One-pot multicomponent synthesis of N-sulfonyl amidines using magnetic separable nanoparticles-decorated N-heterocyclic carbene complex with copper was written by Pawar, Arvind;Gajare, Shivanand;Patil, Audumbar;Kurane, Rajanikant;Rashinkar, Gajanan;Patil, Suresh. And the article was included in Research on Chemical Intermediates in 2021.Safety of 1-Methylbenzimidazole This article mentions the following:

Magnetic separable nanoparticles-decorated N-heterocyclic carbene complex with copper (MNP[1-Me benzimidazole]NHC@Cu) has been prepared by covalent grafting of ionic liquid like 1-Me benzimidazole unit on the surface of chlorofunctionalized Fe₃O₄ magnetic nanoparticles (MNPs) followed by metalation with copper(I) iodide. MNP[1-Me benzimidazole]NHC@Cu complex has been characterized by different techniques including Fourier transform IR spectroscopy, thermogravimetric anal., energy-dispersive X-ray anal., X-ray diffraction, transmission electron microscopy and vibrating sample magnetometer. MNP[1-Me benzimidazole]NHC@Cu complex was successfully implemented as heterogeneous catalyst in one-pot multicomponent synthesis of N-sulfonyl amidines from phenylacetylene, tosyl azide and amines at room temperature Complex could be recycled six times without significant loss in the yield of product. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3Safety 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. Safety of 1-Methylbenzimidazole

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Proton resonance studies on aromatic heterocycles. III. Hydrogen-deuterium exchange with azoles and azolium salts was written by Staab, Heinz A.;Irngartinger, Hermann;Mannschreck, Albrecht;Wu, Mou-Thai. And the article was included in Justus Liebigs Annalen der Chemie in 1966.Quality Control of 1-Methyl-4-nitroimidazole This article mentions the following:

For several azoles and azolium salts were measured the N.M.R. spectra and assignments made; with their aid the H-D exchange of the ring H atoms was investigated. The dependence of the relative deuteration rates on structural factors was discussed in connection with biochem. questions. The N.M.R. spectra of various oxazoles and oxazolium salts were also measured, and also investigated by H-D exchange. 4-Nitroimidazole (I) in D2O (1% solution) heated 13.5 hrs. at 100° resulted in deuteration at C-2 and C-4 (or 5) in the ratio 5:3. A similar experiment in a citrate buffered solution (pH 5.1) gave the same relative deuteration. After heating I in 0.8M NaOD in D2O 12 hrs., both H-2 and H-4 (or 5) were completely exchanged. In contrast, 1-methyl-4-nitroimidazole in D2O (12.5 hrs., 100°, 2.5% solution) was more strongly deuterated at C-5 than at C-2; 90% for H-5 and 50% for H-2. Surprisingly, 1-methyl-5-nitroimidazole under the sample conditions underwent complete exchange at H-2 and only 10% at H-4. The half-life times for deuteration of 4,5-dipropyloxazole and 4,5-diphenyloxazole in MeOD were 600 min. (60°) and 1100 min. (69°), while the 2-position of the corresponding methiodides was completely deuterated in MeOD at 37° after 3 min., In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Quality Control of 1-Methyl-4-nitroimidazole).

1-Methyl-4-nitroimidazole (cas: 3034-41-1) 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 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.Quality Control of 1-Methyl-4-nitroimidazole

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem