Day: January 5, 2023

The role of ammonium oxidising bacteria (AOB) in ionic liquid 1-dodecylpyridinium chloride removal was written by Chua, Feng Jun Desmond;Zhou, Yan. And the article was included in Applied Microbiology and Biotechnology in 2019.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Ionic liquids (IL) have emerged as the next-generation “green” solvent that can replace traditional organic solvent due to properties such as high thermal stability and no vapor pressure. However, their increased usage inevitably allows them to find their way into the environment. The objective of this study was to evaluate the role of autotrophic ammonia-oxidising bacteria (AOB) in the potential removal of 1-dodecylpyridinium chloride ([DPy]⁺Cl) in both short- and long-term studies. In short-term batch experiments, it was observed that a notable amount of [DPy]⁺ can be removed by the AOB culture with the removal mechanism being biodegradation and absorption, with the latter playing a greater role. It was also found that [DPy]⁺ can be released back into the liquid phase when AOB’s preferred substrate, NH₃, was present. In the long-term study, [DPy]⁺Cl was successfully biodegraded and a total of nine transformation products were identified. The biodegradation pathway was also proposed. This study demonstrated that [DPy]⁺Cl can be biol. transformed by enriched AOB culture and the accumulation of the byproduct did not show long-term neg. impact on AOB activities. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application In Synthesis of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cp*Co(III)-Catalyzed C-H Acylmethylation of Arenes by Employing Sulfoxonium Ylides as Carbene Precursors was written by Ji, Shuying;Yan, Kelu;Li, Bin;Wang, Baiquan. And the article was included in Organic Letters in 2018.SDS of cas: 4373-61-9 This article mentions the following:

A Cp*Co(III)-catalyzed C-H bond functionalization of a range of arenes by employing sulfoxonium ylides as carbene precursors instead of diazo compounds and other carbene precursors has been established. This reaction is highly efficient without any additive, possesses high step and atom economies, and tolerates a range of functional groups. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9SDS of cas: 4373-61-9).

2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.SDS of cas: 4373-61-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Rational design of the platinahelicene enantiomers for deep-red circularly polarized organic light-emitting diodes was written by Yan, Zhi-Ping;Luo, Xu-Feng;Liao, Kang;Zheng, You-Xuan;Zuo, Jing-Lin. And the article was included in Frontiers in Chemistry (Lausanne, Switzerland) in 2020.Electric Literature of C6H3BrF3N This article mentions the following:

[n]Helicene derivatives are most popular chiral structures to construct luminescent materials with circularly polarized (CP) light, which have revealed appealing application in chiral optoelectronics. Particularly, because of the unique phosphorescent emission, platinahelicene has great application prospects in CP organic light-emitting diode (CP-OLED). Herein, by decorating the pyridinyl-helicene ligand with trifluoromethyl (-CF3) unit in a specific position, a pair of platinahelicene enantiomers was prepared and separated with extremely twisted structure showing not only superior thermal and configurational stability but also good CP luminescence (CPL) property with dissymmetry factors (|gPL|) of 6 x 10^-3. Moreover, the evaporated CP-OLEDs based on platinahelicene enantiomers exhibited the deep-red emission with the peak at 653 nm as well as obvious CP electroluminescence (CPEL) signals with the |gEL| in 10^-3 order. Therefore, the design strategy provides an efficient way to improve the CPL properties of platinahelicene to cope with the future application in CP-OLEDs. In the experiment, the researchers used many compounds, for example, 2-Bromo-3-(trifluoromethyl)pyridine (cas: 175205-82-0Electric Literature of C6H3BrF3N).

2-Bromo-3-(trifluoromethyl)pyridine (cas: 175205-82-0) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Electric Literature of C6H3BrF3N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Importance of hydrophobic interactions in the single-chained cationic surfactant-DNA complexation was written by Lopez-Lopez, Manuel;Lopez-Cornejo, Pilar;Martin, Victoria Isabel;Ostos, Francisco Jose;Checa-Rodriguez, Cintia;Prados-Carvajal, Rosario;Lebron, Jose Antonio;Huertas, Pablo;Moya, Maria Luisa. And the article was included in Journal of Colloid and Interface Science in 2018.Recommanded Product: 104-73-4 This article mentions the following:

The goal of this work was to understand the key factors determining the DNA compacting capacity of single-chained cationic surfactants. Fluorescence, zeta potential, CD, gel electrophoresis and AFM measurements were carried out to study the condensation of the nucleic acid resulting from the formation of the surfactant-DNA complexes. The apparent equilibrium binding constant of the surfactants to the nucleic acid, K_app, estimated from the exptl. results obtained in the ethidium bromide competitive binding experiments, can be considered directly related to the ability of a given surfactant as a DNA compacting agent. The plot of ln(K_app) vs. ln(cmc), cmc being the critical micelle concentration, for all the bromide and chloride surfactants studied, is a reasonably good linear correlation. Hydrophobic interactions mainly control the surfactant DNA compaction efficiency. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Recommanded Product: 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Recommanded Product: 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Photo-Induced Ruthenium-Catalyzed C-H Benzylations and Allylations at Room Temperature was written by Struwe, Julia;Korvorapun, Korkit;Zangarelli, Agnese;Ackermann, Lutz. And the article was included in Chemistry – A European Journal in 2021.HPLC of Formula: 4373-61-9 This article mentions the following:

The ruthenium-catalyzed synthesis of diarylmethane compounds was realized under exceedingly mild photoredox conditions without the use of exogenous photocatalysts. The versatility and robustness of the ruthenium-catalyzed C-H benzylation was reflected by an ample scope, including multifold C-H functionalizations, as well as transformable pyrazoles, imidates and sensitive nucleosides. Mechanistic studies were indicative of a photoactive cyclometalated ruthenium complex, which also enabled versatile C-H allylations. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9HPLC of Formula: 4373-61-9).

2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.HPLC of Formula: 4373-61-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Facilitating Rh-Catalyzed C-H Alkylation of (Hetero)arenes and 6-Arylpurine Nucleosides (Nucleotides) with Electrochemistry was written by Yang, Qi-Liang;Liu, Ying;Liang, Lei;Li, Zhi-Hao;Qu, Gui-Rong;Guo, Hai-Ming. And the article was included in Journal of Organic Chemistry in 2022.Safety of 2-(m-Tolyl)pyridine This article mentions the following:

An electrochem. approach to promote the ortho C-H alkylation of (hetero)arenes via rhodium catalysis under mild conditions was described. This approach features mild conditions with high levels of regio- and monoselectivity that tolerated a variety of aromatic and heteroaromatic groups and offered a widely applicable method for late-stage diversification of complex mol. architectures including tryptophan, estrone, diazepam, nucleosides and nucleotides. Alkyl boronic acids, esters and alkyl trifluoroborates were demonstrated as suitable coupling partners. The isolation of key rhodium intermediates and mechanistic studies provided strong support for a rhodium(III/IV or V) regime. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Safety of 2-(m-Tolyl)pyridine).

2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Safety of 2-(m-Tolyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Studies on bismaleimides and related materials: 1. DMTA investigation of the reaction of bismaleimides with m-tolualdehyde azine and 3,5-dimethylpyridine N-oxide: an approach to the design of novel reactive diluents was written by Davidson, G.;Soutar, I.;Preston, P. N.;Shah, V. K.;Simpson, S. W.;Stewart, N. J.. And the article was included in Polymer in 1994.Application of 3718-65-8 This article mentions the following:

Dynamic mech. thermal anal. (DMTA) profiles have been recorded for interaction of m-tolualdehyde azine and 3,5-dimethylpyridine N-oxide with the bismaleimide (BMI) derived from 3,3′-diaminobenzophenone. Addnl. chem. events for each system are recognized at temperatures below the conventional BMI curing region. Resins prepared from the BMI/azine and BMI/N-oxide systems have lower thermal stability than the neat resin but differences are moderate at low additive concentrations In the experiment, the researchers used many compounds, for example, 3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8Application of 3718-65-8).

3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Application of 3718-65-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Indolizine synthesis via copper-catalyzed cyclization of gem-difluoroalkenes and 2-(pyridin-2-yl)acetate derivatives was written by Lu, Chuan-Jun;Yu, Xin;Chen, Yu-Ting;Song, Qing-Bao;Wang, Hong. And the article was included in Organic Chemistry Frontiers in 2020.Application of 917023-06-4 This article mentions the following:

A novel and versatile approach to construct substituted indolizines I (R = H, 6-Br; Ar = Ph, 3,4-dimethoxyphenyl, thiophen-2-yl, (3E)-4-phenylbut-3-en-1-yl, etc.) through copper-catalyzed coupling cyclization of 2-(pyridin-2-yl)acetate II (R¹ = C(O)OMe, C(O)OEt, C(O)Oi-Pr, C(O)Me) with gem-difluoroalkenes ArCH=C(F)₂ has been developed. This method takes advantage of the cleavage of C-F bonds, providing a straightforward and efficient access to a variety of bisubstituted indolizine derivatives I in moderate to good yields with brilliant functional group compatibility. In the experiment, the researchers used many compounds, for example, Methyl 2-(5-bromopyridin-2-yl)acetate (cas: 917023-06-4Application of 917023-06-4).

Methyl 2-(5-bromopyridin-2-yl)acetate (cas: 917023-06-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Application of 917023-06-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Predicting Toxicity of Ionic Liquids in Acetylcholinesterase Enzyme by the Quantitative Structure-Activity Relationship Method Using Topological Indexes was written by Yan, Fangyou;Xia, Shuqian;Wang, Qiang;Ma, Peisheng. And the article was included in Journal of Chemical & Engineering Data in 2012.SDS of cas: 17281-59-3 This article mentions the following:

A new topol. index (TI) was proposed based on atom characters (e.g., atom radius, atom electronegativity, etc.) and atom positions in the hydrogen-suppressed mol. structure in our previous work. In this work, the TI was used for predicting the toxicity of ILs in acetylcholin esterase (log EC₅₀ AChE) by the multiple linear regression (MLR) method. For ILs composed entirely of cations and anions, the TIs are calculated from cations and anions, resp. The 221 ILs used in the MLR model are based on imidazolium (Im), pyridinium (Pyi), pyrrolidinium (Pyo), ammonium (Am), phosphonium (Ph), quinolinium (Qu), piperidinium (Pi), and morpholinium (Mo). The regression coefficient (R²) and the overall average absolute error (AAE) are 0.877 and 0.153, resp. In the experiment, the researchers used many compounds, for example, 1-(Cyanomethyl)pyridin-1-ium chloride (cas: 17281-59-3SDS of cas: 17281-59-3).

1-(Cyanomethyl)pyridin-1-ium chloride (cas: 17281-59-3) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.SDS of cas: 17281-59-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Experimental and modeling investigation of pure and mixed surfactant aggregation and associated steel corrosion inhibition in aqueous media was written by Ning, Zhiqiang;Zhu, Yakun;Free, Michael L.. And the article was included in International Journal of Electrochemical Science in 2015.Formula: C17H30BrN This article mentions the following:

The corrosion issues have led to great interest in industry and academia to control corrosion of metallic pipelines in various oilfields around the world. Among the existing corrosion control methods, surfactant inhibitors have widely been used for corrosion inhibition of metallic pipelines. One model for the prediction of corrosion inhibition efficiency of various pure surfactant and mixed surfactants in aqueous media is developed and validated. The prediction model is based on Langmuir adsorption (LA) sub-model in combination with a critical micelle concentration (cmc) prediction sub-model to create an integrated corrosion inhibition prediction model. The model derivation is introduced by using an example of mixed homologous benzalkonium chlorides (BAC) in NaCl-containing aqueous media and further validated using addnl. testing systems of pure and mixed surfactants. This developed corrosion inhibition prediction model provides a potential method to evaluate the effectiveness of various surfactants in metal corrosion inhibition under various conditions of aqueous media. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Formula: C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem