Category: pyridine-derivatives

High pressure structural investigations of 2,5-di(4-pyridyl)-1,3,4-oxadiazole-importance of strain studies for the description of intermolecular interactions was written by Orgzall, Ingo;Franco, Olga;Schulz, Burkhard. And the article was included in Journal of Physics: Condensed Matter in 2006.Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole This article mentions the following:

Results of a high pressure x-ray study of 2,5-di(4-pyridyl)-1,3,4-oxadiazole up to 2.5 GPa are presented and discussed. Parameters for the Murnaghan equation of state are derived. The bulk modulus amounts to K₀ = 4.6 ± 0.3 GPa and its pressure derivative to K’₀ = 7.4 ± 0.6. These values are comparable to values of other diphenyl-1,3,4-oxadiazoles. The anisotropy of the compression is analyzed using the strain tensor and discussed based on the anisotropy of the intermol. interactions. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. 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. Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of Electron-Rich Covalent Organic Frameworks COF-JLU25 for Photocatalytic Aerobic Oxidative Hydroxylation of Arylboronic Acids to Phenols was written by Xiao, Guangjun;Li, Wenqian;Chen, Tao;Hu, Wei-Bo;Yang, Hui;Liu, Yahu A.;Wen, Ke. And the article was included in European Journal of Organic Chemistry in 2021.Application In Synthesis of Pyridin-4-ol This article mentions the following:

Visible-light-driven organic reactions are environmentally friendly green chem. transformations among which photosynthetic oxidative hydroxylation of arylboronic acids to phenols has attracted increasing research interest during the very recent years. Given the efficiency and reusability of heterogeneous catalysts, COF-JLU25, an electron-rich COF-based photocatalyst constructed by integrating electron-donating blocks 1,3,6,8-tetrakis(4-aminophenyl)pyrene (PyTA) and 4-[4-(4-formylmethyl)-2,5-dimethoxyphenyl] benzaldehyde (TpDA), was selected as a photocatalyst for the oxidative hydroxylation of arylboronic acids. In our studies, COF-JLU25 demonstrated excellent photocatalytic activity with high efficiency, robust reusability, and low catalyst loading, showcasing an application potential of previously underexplored COF-based photocatalyst composed solely of electron-rich units. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Application In Synthesis of Pyridin-4-ol).

Pyridin-4-ol (cas: 626-64-2) 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. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. 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.Application In Synthesis of Pyridin-4-ol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Palladium-Catalyzed C-H Bond Functionalization Reactions Using Phosphate/Sulfonate Hypervalent Iodine Reagents was written by He, Yimiao;Huang, Lilan;Xie, Limei;Liu, Peng;Wei, Qiongmei;Mao, Fangfang;Zhang, Xuehong;Huang, Jun;Chen, Sijing;Huang, Chusheng. And the article was included in Journal of Organic Chemistry in 2019.Application of 4373-61-9 This article mentions the following:

In the presence of Pd(OAc)₂, 8-methylquinolines and 8-ethylquinoline underwent directed and regioselective oxidative phosphorylation, phosphination, sulfonylation, and hydroxylation reactions with (hydroxy)aryliodine phosphates, phosphinates, and sulfonates to yield 8-quinolinylmethyl phosphates, phosphinates, sulfonates, and alcs. 2-Arylpyridines underwent hydroxylation and arylation reactions under similar conditions to yield 2-(2-pyridinyl)phenols and biarylpyridines, resp. The quinolinylmethyl sulfonates underwent further substitution reactions. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Application of 4373-61-9).

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� in pyridine vs. 150 kJ·mol� in benzene). 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. Application of 4373-61-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Design and Synthesis of New Pyrazole-Based Heterotricycles and their Derivatization by Automated Library Synthesis was written by Fricero, Prisca;Bialy, Laurent;Czechtizky, Werngard;Mendez, Maria;Harrity, Joseph P. A.. And the article was included in ChemMedChem in 2020.SDS of cas: 116922-60-2 This article mentions the following:

This work highlighted how a readily assembled N-hydroxyethyl pyrazole trifluoroborate offered rapid access to architecturally distinct 5-6-6- and 5-7-6-fused tricyclic compounds such as I [R = F, NO₂, CO₂H, etc.] and II [R¹ = NEt₂, N-morpholino, NHCH₂-2-pyridyl, etc.]. This chem. was not only amenable to single compound synthesis, but also to high-throughput experimentation. It give easy access to diverse compound arrays with various physicochem. and ADME profiles by fully automated library synthesis. The combination of the high-throughput experimentation with rapid testing of the compounds in an integrated physicochem. and ADME profiling workflow allowed accelerated design of novel lead compounds in drug-discovery projects. In the experiment, the researchers used many compounds, for example, 3-Bromo-4-fluoropyridine (cas: 116922-60-2SDS of cas: 116922-60-2).

3-Bromo-4-fluoropyridine (cas: 116922-60-2) 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. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. 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. SDS of cas: 116922-60-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis and fungicidal activity of novel oxathiapiprolin derivatives was written by Ding, Chengrong;Pan, Yayun;Yin, Xu;Tan, Chengxia;Wang, Xuedong. And the article was included in Youji Huaxue in 2019.Computed Properties of C11H20N2O2S This article mentions the following:

In order to explore the structure of lead compounds with biol. activities, using oxathiapiprolin as a template, sixteen oxathiapiprolin derivatives I [R = Me, cyclopropyl, 2,6-di-ClC₆H₃; R¹ = H, Ph, 2-FC₆H₄, etc.] were designed and synthesized to study the influences of substituent to the fungicidal activity. All the structures I were confirmed by ¹H NMR, ¹³C NMR and HRMS. Preliminary bioassay showed that the target compounds I generally had fungicidal activitives in vitro at a concentration of 100μg/mL, the fungicidal activities of compounds I [R = cyclopropyl; R¹ = 2-FC₆H₄] against F. graminearum was 60%, the fungicidal activities of six target compounds against D. mali were 70%, the fungicidal activities of four target compounds against Phytophthora infestans were 50%, and the fungicidal activities of I [R = Me; R¹ = 3-MeC₆H₄] against B. cinerea was 75%. In addtion, the fungicidal activities of the target compounds aganist Diplocarpon mali and Botrytis cinerea at 100μg/mL were higher to azoxystrobin at 50μg/mL. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1Computed Properties of C11H20N2O2S).

tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1) 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. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Computed Properties of C11H20N2O2S

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Catalyst-Free N-Deoxygenation by Photoexcitation of Hantzsch Ester was written by Konev, Mikhail O.;Cardinale, Luana;Jacobi von Wangelin, Axel. And the article was included in Organic Letters in 2020.Reference of 3718-65-8 This article mentions the following:

A mild and operationally simple protocol for the deoxygenation of a variety of heteroaryl N-oxides and nitroarenes has been developed. A mixture of substrate and Hantzsch ester is proposed to result in an electron donor-acceptor complex, which upon blue-light irradiation undergoes photoinduced electron transfer between the two reactants to afford the products. N-oxide deoxygenation is demonstrated with 22 examples of functionally diverse substrates, and the chemoselective reduction of nitroarenes to the corresponding hydroxylamines is also shown. In the experiment, the researchers used many compounds, for example, 3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8Reference of 3718-65-8).

3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8) 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. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Reference of 3718-65-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

π-Conjugated N-heterocyclic compounds: correlation of computational and electrochemical data was written by Al-Anber, M.;Vatsadze, S.;Holze, R.;Lang, H.;Thiel, W. R.. And the article was included in Dalton Transactions in 2005.Category: pyridine-derivatives This article mentions the following:

Electrochem. reduction potentials of a broad selection of nitrogen-containing mols. suitable as bridging (dipodal and tripodal) ligands in coordination and organometallic chem. are reported and compared with results of semiempirical calculations Trends of electrode potentials observed exptl. agree with resp. calculated data, deviations can be explained by invoking peculiarities of the involved MOs and ligand-electrode surface interactions. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Category: pyridine-derivatives).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of âˆ?8.7 × 10âˆ? cm3·molâˆ?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·molâˆ? in the liquid phase and 140.4 kJ·molâˆ? 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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Diarylthiazole: an antimycobacterial scaffold potentially targeting PrrB-PrrA two-component system was written by Bellale, Eknath;Naik, Maruti;Varun, V. B.;Ambady, Anisha;Narayan, Ashwini;Ravishankar, Sudha;Ramachandran, Vasanthi;Kaur, Parvinder;McLaughlin, Robert;Whiteaker, James;Morayya, Sapna;Guptha, Supreeth;Sharma, Sreevalli;Raichurkar, Anandkumar;Awasthy, Disha;Achar, Vijayshree;Vachaspati, Prakash;Bandodkar, Balachandra;Panda, Manoranjan;Chatterji, Monalisa. And the article was included in Journal of Medicinal Chemistry in 2014.Reference of 214834-18-1 This article mentions the following:

Diarylthiazole (DAT), a hit from diversity screening, was found to have potent antimycobacterial activity against Mycobacterium tuberculosis (Mtb). In a systematic medicinal chem. exploration, the authors demonstrated chem. opportunities to optimize the potency and physicochem. properties. The effort led to more than 10 compounds with submicromolar MICs and desirable physicochem. properties. The potent antimycobacterial activity, in conjunction with low mol. weight, made the series an attractive lead (antibacterial ligand efficiency (ALE) >0.4). The series exhibited excellent bactericidal activity and was active against drug-sensitive and resistant Mtb. Mutational anal. showed that mutations in prrB impart resistance to DAT compounds but not to reference drugs tested. The sensor kinase PrrB belongs to the PrrBA two component system and is potentially the target for DAT. PrrBA is a conserved, essential regulatory mechanism in Mtb and has been shown to have a role in virulence and metabolic adaptation to stress. Hence, DATs provide an opportunity to understand a completely new target system for antimycobacterial drug discovery. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1Reference of 214834-18-1).

tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol� in pyridine vs. 150 kJ·mol� in benzene). Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Reference of 214834-18-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis of phenoxypyridines under phase transfer catalysis conditions was written by Abele, E.;Gol’dberg, Yu. Sh.;Gavars, M.;Gaukhman, A. P.;Shimanskaya, M. V.. And the article was included in Khimiya Geterotsiklicheskikh Soedinenii in 1988.Quality Control of 2-Phenoxypyridine This article mentions the following:

Reaction of halopyridines with PhOM (M = Na, K) in a two-phase liquid-solid catalytic system gave phenoxypyridine. With polyhalopyridines, substitution occurred at the α- and γ-positions. Reaction of o-(KO)₂C₆H₄ with 2,3,5,6-tetrabromopyridine gave azaphenoxane I. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Quality Control of 2-Phenoxypyridine).

2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol� in pyridine vs. 150 kJ·mol� in benzene). Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Quality Control of 2-Phenoxypyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Chemoselective oxidation of aryl organoboron systems enabled by boronic acid-selective phase transfer was written by Molloy, John J.;Clohessy, Thomas A.;Irving, Craig;Anderson, Niall A.;Lloyd-Jones, Guy C.;Watson, Allan J. B.. And the article was included in Chemical Science in 2017.Electric Literature of C6H7NO2 This article mentions the following:

The authors report the direct chemoselective Brown-type oxidation of aryl organoboron systems containing two oxidizable B groups. Basic biphasic reaction conditions enable selective formation and phase transfer of a boronic acid trihydroxyboronate in the presence of boronic acid pinacol (BPin) esters, while avoiding speciation equilibrium Spectroscopic studies validate a base-promoted phase-selective discrimination of organoboron species. This phenomenon is general across a broad range of organoboron compounds and can also be used to invert conventional protecting group strategies, enabling chemoselective oxidation of BMIDA species over normally more reactive BPin substrates. The authors also demonstrate the selective oxidation of diboronic acid systems with chemoselectivity predictable a priori. The utility of this method is exemplified through the development of a chemoselective oxidative nucleophile coupling. In the experiment, the researchers used many compounds, for example, 5-Hydroxy-2-methoxylpyridine (cas: 51834-97-0Electric Literature of C6H7NO2).

5-Hydroxy-2-methoxylpyridine (cas: 51834-97-0) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Electric Literature of C6H7NO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem