Category: pyridine-derivatives

Lu, Yinfu; Wang, Jinglan; Wu, Yaqian; Xu, Shengxian; Zhao, Feng; He, Haifeng; Wang, Yibo published their research in Polyhedron in 2021. The article was titled 《Yellow-green luminescence of four-coordinate copper(I) complexes bearing N-heterocyclic carbene (NHC) ligands: Synthesis, photophysical and computational studies》.Related Products of 3510-66-5 The article contains the following contents:

The synthesis and photophys. investigation of a series of six copper(I) complexes [(1,2-Ph2PC6H4OC6H4PPh2)(1-PhCH2BimMe2-3-PyR1R2)Cu][PF6] (1-6; BimMe2 = 5,6-dimethylbenzimidazol-2-ylidene; PyR1R2 = 6-R1-5-R2-2-pyridyl) bearing benzimidazolylidene-type N-heterocyclic carbene (NHC) ligands with different groups are reported. Their photophys. properties can be tuned by adjusting the groups at the R1/R2 positions of the pyridine ring. The lowest-lying metal-to-ligand (MLCT) absorption bands at 325-437 nm can be observed for all the complexes. Upon excitation with UV light all the complexes emit bright yellow-green light (λem = 540-573 nm) with higher emission quantum yields of 21.1-55.6% and excited state lifetimes on the microsecond scale (τ = 30.6-62.1μs) in PMMA films. The substituents (R2 = COMe, F, Br, Me, or OMe) on R2-position of the pyridine ring were shown to have effects on the emission wavelengths of these complexes, while the introduction of R1 substituents (R1 = CH3) shows negligible effects on the emission wavelength but allow the enhancement of photoluminescence quantum yield (Φ) of the complexes. Addnl., the electronic properties, absorption and emission profiles of these complexes were further explored using DFT/TDDFT methods. In the experimental materials used by the author, we found 2-Bromo-5-methylpyridine(cas: 3510-66-5Related Products of 3510-66-5)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Related Products of 3510-66-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Tetrahedron included an article by Wan, Xiao-Min; Liu, Zi-Lin; Liu, Wan-Qing; Cao, Xiao-Niu; Zhu, Xinju; Zhao, Xue-Mei; Song, Bing; Hao, Xin-Qi; Liu, Guoji. Computed Properties of C6H4N2. The article was titled 《NNN pincer Ru(II)-catalyzed dehydrogenative coupling of 2-aminoarylmethanols with nitriles for the construction of quinazolines》. The information in the text is summarized as follows:

An efficient NNN pincer Ru(II)-catalyzed preparation of quinazolines via acceptorless dehydrogenative strategy was developed. Under the optimized conditions, a broad range of substituted o-aminobenzyl alcs. and (hetero)aryl or alkyl nitriles were well tolerated to afford various 2-substituted quinazolines in high yields. Subsequently, a set of control experiments was performed to elucidate the reaction mechanism, which underwent alc. oxidation, nitrile hydration and cyclocondensation steps. This protocol was featured with several advantages, such as environmental benignity, operational simplicity, broad substrate scope (compatible with aliphatic nitriles, up to 87% yield) and short reaction time (mostly in 2 h). The results came from multiple reactions, including the reaction of 4-Cyanopyridine(cas: 100-48-1Computed Properties of C6H4N2)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine is widely used in the precursor to agrochemicals and pharmaceuticals. Also, it is used as an important reagent and organic solvent.Computed Properties of C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Zhou, Pei; Wang, Lei; Wu, Guangyu; Zhou, Yuting; Hegazy, Mohammad; Huang, Xin published 《In Situ Generation of Core-Shell Protein-Based Microcapsules with Regulated Ion Absorbance Capacity》.ChemistrySelect published the findings.COA of Formula: C7H9NO The information in the text is summarized as follows:

In this study, we presented a way to generate organic/protein hybrid core-shell micro-compartment structure by in situ generating poly(o-phenylenediamine) (POPD) nanoparticles inside a robust and flexible protein-based shell. Both the size and number of the generated POPD core inside the protein microcapsules could be well varied by using different oxidants including, H2O2, tert-Bu hydroperoxide (TBHP) and glucose oxidase (GO)/ glucose (Glu). Significantly, via operating the membrane permeability by either the cleavage of the conjugated polymer or addnl. formation of tannic acid/Fe3+ complex outer shell, the adsorption capacity towards Cu2+ of the constructed multiple cores in single shell model could be well modulated. In general, our studies contribute to the establishment of an improved model with its potential applications in catalysis system, biotechnol. and biomedicine. In the part of experimental materials, we found many familiar compounds, such as 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2COA of Formula: C7H9NO)

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. COA of Formula: C7H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Viologen Derivatives Extended with Aromatic Rings Acting as Negative Electrode Materials for Use in Rechargeable Molecular Ion Batteries》 was written by Kato, Minami; Sano, Hikaru; Kiyobayashi, Tetsu; Yao, Masaru. Application of 624-28-2This research focused onviologen derivative aromatic ring electrode rechargeable mol battery; anions; charge transfer; energy storage; fluorescence; redox chemistry. The article conveys some information:

Many types of batteries have been proposed as next-generation energy-storage systems. One candidate is a rocking-chair-type “”mol. ion battery”” in which a mol. ion, instead of Li+, works as a charge carrier. Previously, a viologen-type derivative is reported as a neg. electrode material that releases and receives PF6- anions during the charge-discharge process; however, its redox potential was not satisfactorily low. Further, the two potential plateaus of this material (difference = 0.5 V) should be reduced. In this study, PF6- salts of viologen (bipyridinium) derivatives extended by aromatic rings were synthesized to obtain a neg. electrode material with a lower redox potential and small potential change during the charge and discharge processes. Some of the synthesized viologen derivatives were fluorescent even in solid-state electrodes. In the half-cell configuration, the prepared neg. electrode materials showed average voltages of approx. 2 V (vs. Li+/Li), which is lower than that of conventional viologen derivatives The experimental process involved the reaction of 2,5-Dibromopyridine(cas: 624-28-2Application of 624-28-2)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Application of 624-28-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Substituent Effects of 2-Pyridones on Selective O-Arylation with Diaryliodonium Salts: Synthesis of 2-Aryloxypyridines under Transition-Metal-Free Conditions》 was written by Li, Xiao-Hua; Ye, Ai-Hui; Liang, Cui; Mo, Dong-Liang. Application In Synthesis of Methyl 6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxylate And the article was included in Synthesis on April 30 ,2018. The article conveys some information:

An efficient transition-metal-free strategy to synthesize 2-aryloxypyridine derivatives was developed by a selective O-arylation of 2-pyridones with diaryliodonium salts. The reaction was compatible with a series of functional groups for 2-pyridones and diaryliodonium salts such as halides, nitro, cyano and ester groups. The substituents at the C6-position of 2-pyridones favored O-arylation products because of steric hindrance. The reaction was easily performed on a gram-scale and 6-chloro-2-pyridone was a good precursor to access various unsubstituted 2-aryloxypyridines by dehalogenation. A P2Y1 lead compound analog I could be prepared in good yield over two steps. The experimental part of the paper was very detailed, including the reaction process of Methyl 6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxylate(cas: 77837-09-3Application In Synthesis of Methyl 6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxylate)

Methyl 6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxylate(cas: 77837-09-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Application In Synthesis of Methyl 6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxylateThe lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Manganese-Catalyzed Synthesis of Imines from Primary Alcohols and (Hetero)Aromatic Amines》 was written by Raydan, Daniel; Friaes, Sofia; Viduedo, Nuno; Santos, A. Sofia; Gomes, Clara S. B.; Royo, Beatriz; Marques, M. Manuel B.. Computed Properties of C5H5BrN2 And the article was included in Synlett on August 31 ,2022. The article conveys some information:

Herein, the synthesis of a wide variety of imines through oxidative coupling of alcs. and aromatic amines catalyzed by Mn complexes bearing NN triazole ligands was described. A wide variety of imines in excellent yields (up to 99%) was prepared Mn-based catalysts proved to be highly efficient and versatile, allowing for the first time the preparation of several imines containing N-based heterocycles. In addition to this study using 2-Bromopyridin-3-amine, there are many other studies that have used 2-Bromopyridin-3-amine(cas: 39856-58-1Computed Properties of C5H5BrN2) was used in this study.

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Computed Properties of C5H5BrN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Intramolecular electrochemical dehydrogenative N-N bond formation for the synthesis of 1,2,4-triazolo[1,5-a]pyridines》 was written by Li, Yong; Ye, Zenghui; Chen, Na; Chen, Zhenkun; Zhang, Fengzhi. Formula: C6H4N2This research focused ontriazolopyridine preparation green chem; amidine pyridyl electrochem dehydrogenation. The article conveys some information:

A metal- and oxidant-free intramol. dehydrogenative N-N bond formation has been developed under mild and scalable electrolytic conditions. Various valuable 1,2,4-triazolo[1,5-a]pyridines I (R1 = t-Bu, cyclopropyl, 2,6-dichlorophenyl, 2-naphthyl, pyridin-4-yl, etc.; R2 = H, Me; R3 = H, Me, Et, F, Cl, 4-methylphenyl, 2-thiophenyl; R4 = H, Me, MeO; R5 = H, Me, Cl; R3R4 = CH=CH-CH=CH) were synthesized efficiently from the readily available N-(2-pyridyl)amidines II. The reactions were conducted in a simple undivided cell under constant current conditions with n-Bu4NBr as both the redox mediator and the electrolyte. This protocol was applied to the efficient synthesis of key intermediates for anti-diabetic compounds After reading the article, we found that the author used 4-Cyanopyridine(cas: 100-48-1Formula: C6H4N2)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Formula: C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C12H12N2In 2022 ,《A self-oscillating gel system with complex dynamic behavior based on a time delay between the oscillations》 was published in Soft Matter. The article was written by Li, Xiuchen; Li, Jie; Zheng, Zhaohui; Deng, Jinni; Pan, Yi; Ding, Xiaobin. The article contains the following contents:

The time delay existing between the chem. oscillation and mech. oscillation (C-M delay) in a self-oscillating gel (SOG) system is observable in previous exptl. studies. However, how the C-M delay affects the dynamic behavior of a large anisotropic SOG has not been quantified or reported systematically. In this study, we observed that the oscillation period increases with a decrease in the crosslinking d. of the anisotropic SOG, and this determined whether regular mech. oscillation occurs. Unlike before, the disrupted mech. oscillations interestingly tend to be regular and periodic under visible light, which is an inhibitor for the B-Z reaction incorporating the Ru complex as a catalyst (Ru-BZ reaction). Moreover, the study of the C-M delay at different scales has far-reaching implications for intelligent soft actuators. The experimental part of the paper was very detailed, including the reaction process of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Electric Literature of C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Electric Literature of C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Name: 4-CyanopyridineIn 2019 ,《Synthesis of Secondary Aldimines from the Hydrogenative Cross-Coupling of Nitriles and Amines over Al2O3-Supported Ni Catalysts》 was published in ACS Catalysis. The article was written by Zhou, Peng; Jiang, Liang; Wang, Shuguo; Hu, Xun; Wang, Hongming; Yuan, Ziliang; Zhang, Zehui. The article contains the following contents:

A heterogeneous Ni catalyst was discovered to be active in the synthesis of secondary cross-imines via hydrogenative coupling of nitriles and amines. The mesoporous Al2O3-supported Ni nanoparticles (abbreviated as Ni/m-Al2O3-600, where 600 represents the reduction temperature) were active in hydrogenative coupling of nitriles and amines reaction at 80 °C and 1 bar H2, affording corresponding cross-imines with yields in the range 64.1-98.1%. D. functional theory calculations reveal the hydrogenation of benzonitrile (PhCN) to benzylamine (PhCH2NH2) has higher activation energy than that for hydrogenative cross-coupling of PhCN and RNH2 on the Ni/m-Al2O3-600 catalyst, suggesting the latter reaction is more favorable. The theor. calculations are in good agreement with our exptl. results. In the experiment, the researchers used many compounds, for example, 4-Cyanopyridine(cas: 100-48-1Name: 4-Cyanopyridine)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Name: 4-Cyanopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2,6-DiaminopyridineIn 2020 ,《New Pyridine-Bridged Ferrocene-Rhodamine Receptor for the Multifeature Detection of Hg2+ in Water and Living Cells》 appeared in ACS Omega. The author of the article were Guo, Yu-Shuang; Zhao, Mei; Wang, Qiong; Chen, Yu-Qin; Guo, Dian-Shun. The article conveys some information:

A challenge in the design of optical and redox-active receptors is how to combine a specific recognition center with an efficient responsive system to facilely achieve multifeature detection in biol. and environmental analyses. Herein, a novel ferrocene-rhodamine receptor conjugated with a pyridine bridge was designed and synthesized. This receptor can sensitively sense Hg2+ in aqueous media via chromogenic, fluorogenic, and electrochem. multisignal outputs with a low detection limit and fast response time. Moreover, it can be qualified as a fluorescent probe for effectively monitoring Hg2+ in living cells. A plausible recognition mode was proposed and rationalized with theor. calculations In the experiment, the researchers used many compounds, for example, 2,6-Diaminopyridine(cas: 141-86-6Application In Synthesis of 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Application In Synthesis of 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem