Pyridine-derivatives

Tripathi, Suparna; Hossain, Anowar; Seth, Saikat Kumar; Mukhopadhyay, Subrata published an article on February 15 ,2021. The article was titled 《Supramolecular association and quantification of intermolecular interactions of 4′-functionalized 2,2′:6′,2”-terpyridines: Experimental observation and theoretical studies》, and you may find the article in Journal of Molecular Structure.Synthetic Route of C20H14N4 The information in the text is summarized as follows:

Three versatile 4′-substituted 2,2′:6′,2”-terpyridine compounds (1-3) having different substitutions (4-ethoxyphenyl, 4-methoxyphenyl and pyridyl) at 4′-position of the central pyridine ring have been synthesized and structurally characterized. Three representative crystal structures have been determined through single crystal X-ray diffraction anal. X-ray crystallog. revels that the structures are stabilized through C-H···π and π-π stacking interactions. In the solid-state, the supramol. assemblies of the title compounds have been explored in detail. Compounds (1) and (3) exhibits both C-H···π and π-π interactions in building supramol. assemblies whereas compound (2) exhibit π-π interaction only. All the intermol. interactions that are involved within the structures are quantified through Hirshfeld surface analyses. The weak noncovalent interactions that played significant role in building supramol. assemblies are further characterized by Bader’s theory of ‘atoms-in-mols.’ (AIM). Finally, the supramol. networks are characterized by theor. ‘Noncovalent Interaction’ (NCI) plot index. The supramol. solid-state frameworks of three 4′-functionalized 2,2′:6′,2”-terpyridine derivatives have been quantified which are further characterized theor. by the Bader’s theory of ‘atoms-in-mols.'(AIM) and ‘noncovalent interaction’ (NCI) plot index. In the part of experimental materials, we found many familiar compounds, such as 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Synthetic Route of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) 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. Synthetic Route of C20H14N4 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2013,Zhang, Yuanyuan; Yang, Weiqing; Xu, Keping; Ma, Menglin; Wang, Yuliang published 《Synthesis and antibacterial activities of pleuromutilin derivatives containing aryl urea groups》.Letters in Drug Design & Discovery published the findings.Safety of 6-Bromopyridin-3-amine The information in the text is summarized as follows:

A series of novel pleuromutilin derivatives containing aryl urea groups was synthesized and their antibacterial activity was evaluated in vitro against Staphylococcus aureus ATCC 26113, Staphylococcus aureus SC, Staphylococcus albus ATCC 8799 and Pseudomonas aeruginosa ATCC 27853. Most of compounds exhibited more potent activities than reference drug Tiamulin against Staphylococcus aureus ATCC 26113 and Saphylococcus aureus SC. Several compounds containing a pyridine urea group and a compound with a quinoline urea group showed excellent activity with the MIC value less than 0.001 μg/mL against Staphylococcus aureus SC. The title compounds thus formed included a thioether urea pyridine derivative (I) and related substances. The synthesis of the target compounds was achieved by a reaction of 2-[(2-amino-1,1-dimethylethyl)thio]acetic acid 6-ethenyldecahydro-5-hydroxy-4,6,9,10-tetramethyl-1-oxo-3a,9-propano-3aH-cyclopentacycloocten-8-yl ester with 2,2,2-trichloro-N-phenylacetamide derivatives and analogs. In the experiment, the researchers used 6-Bromopyridin-3-amine(cas: 13534-97-9Safety of 6-Bromopyridin-3-amine)

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Many important products require amines as part of their syntheses. Methylamine is utilized in the production of the analgesic meperidine (trade name Demerol) and the photographic developer Metol (trademark), and dimethylamine is used in the synthesis of the antihistamine diphenhydramine (trade name Benadryl), the solvent dimethylformamide (DMF), and the rocket propellant 1,1-dimethylhydrazine. The synthesis of the insect repellent N,N-diethyl-m-toluamide (DEET) incorporates diethylamine while that of the synthetic fibre Kevlar requires aromatic amines.Safety of 6-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2014,Flanagan, Jack U.; Atwell, Graham J.; Heinrich, Daniel M.; Brooke, Darby G.; Silva, Shevan; Rigoreau, Laurent J. M.; Trivier, Elisabeth; Turnbull, Andrew P.; Raynham, Tony; Jamieson, Stephen M. F.; Denny, William A. published 《Morpholylureas as a new class of potent and selective inhibitors of the type 5 17-β-hydroxysteroid dehydrogenase (AKR1C3)》.Bioorganic & Medicinal Chemistry published the findings.Computed Properties of C5H3BrClN The information in the text is summarized as follows:

Inhibitors of the aldo-keto reductase enzyme AKR1C3 are of interest as potential drugs for leukemia and hormone-related cancers. A series of non-carboxylate morpholino(phenylpiperazin-1-yl)methanones were prepared by palladium-catalyzed coupling of substituted Ph or pyridyl bromides with the known morpholino(piperazin-1-yl)methanone, and shown to be potent (IC50 ∼ 100 nM) and very isoform-selective inhibitors of AKR1C3. Lipophilic electron-withdrawing substituents on the Ph ring were pos. for activity, as was an H-bond acceptor on the other terminal ring, and the ketone moiety (as a urea) was essential. These structure-activity relationships are consistent with an X-ray structure of a representative compound bound in the AKR1C3 active site, which showed H-bonding between the carbonyl oxygen of the drug and Tyr55 and His117 in the ‘oxyanion hole’ of the enzyme, with the piperazine bridging unit providing the correct twist to allow the terminal benzene ring to occupy the lipophilic pocket and align with Phe311.5-Bromo-2-chloropyridine(cas: 53939-30-3Computed Properties of C5H3BrClN) was used in this study.

5-Bromo-2-chloropyridine(cas: 53939-30-3) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Computed Properties of C5H3BrClN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2015,Maity, Pintu; Kundu, Debasish; Ranu, Brindaban C. published 《Visible-Light-Photocatalyzed Metal-Free C-H Heteroarylation of Heteroarenes at Room Temperature: A Sustainable Synthesis of Biheteroaryls》.European Journal of Organic Chemistry published the findings.Application In Synthesis of 6-Bromopyridin-3-amine The information in the text is summarized as follows:

An efficient C-H heteroarylation of heteroarenes is achieved through visible-light photoredox-catalyzed diazotization of heteroarylamines in situ by tBuONO at room temperature A library of functionalized biheteroaryls is obtained by using this protocol. The reaction avoids the use of transition-metal catalysts, additives, and acidic reaction medium. In addition to this study using 6-Bromopyridin-3-amine, there are many other studies that have used 6-Bromopyridin-3-amine(cas: 13534-97-9Application In Synthesis of 6-Bromopyridin-3-amine) was used in this study.

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Application In Synthesis of 6-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2015,Kobayashi, Toshiki; Furusawa, Yuki; Yamada, Shoya; Akehi, Masaru; Takenaka, Fumiaki; Sasaki, Takanori; Akahoshi, Akiya; Hanada, Takahisa; Matsuura, Eiji; Hirano, Hiroyuki; Tai, Akihiro; Kakuta, Hiroki published 《Positron Emission Tomography to Elucidate Pharmacokinetic Differences of Regioisomeric Retinoid X Receptor Agonists》.ACS Medicinal Chemistry Letters published the findings.Safety of 5-Bromo-2-chloropyridine The information in the text is summarized as follows:

RXR partial agonist NEt-4IB (2a, 6-[ethyl-(4-isobutoxy-3-isopropylphenyl)amino]pyridine-3-carboxylic acid: EC50 = 169 nM, Emax = 55%) showed a blood concentration higher than its Emax after single oral administration at 30 mg/kg to mice, and repeated oral administration at 10 mg/kg/day to KK-Ay mice afforded antitype 2 diabetes activity without the side effects caused by RXR full agonists. However, RXR full agonist NEt-3IB (1a), in which the isobutoxy and iso-Pr groups of 2a are interchanged, gave a much lower blood concentration than 2a. Here we used positron emission tomog. (PET) with tracers [11C]1a, [11C]2a and fluorinated derivatives [18F]1b, [18F]2b, which have longer half-lives, to examine the reason why 1a and 2a exhibited significantly different blood concentrations As a result, the reason for the high blood concentration of 2a after oral administration was found to be linked to higher intestinal absorbability together with lower biliary excretion, compared with 1a. The experimental part of the paper was very detailed, including the reaction process of 5-Bromo-2-chloropyridine(cas: 53939-30-3Safety of 5-Bromo-2-chloropyridine)

5-Bromo-2-chloropyridine(cas: 53939-30-3) 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. Safety of 5-Bromo-2-chloropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2018,Ding, Shi; Dai, Rui-Yang; Wang, Wen-Ke; Cao, Qiao; Lan, Le-Fu; Zhou, Xian-Li; Yang, Yu-She published 《Design, synthesis and structure-activity relationship evaluation of novel LpxC inhibitors as Gram-negative antibacterial agents》.Bioorganic & Medicinal Chemistry Letters published the findings.SDS of cas: 29682-15-3 The information in the text is summarized as follows:

LpxC inhibitors are new-type antibacterial agents developed in the last twenty years, mainly against Gram-neg. bacteria infections. To develop novel LpxC inhibitors with good antibacterial activities and biol. metabolism, the authors summarized the basic skeleton of reported LpxC inhibitors, designed and synthesized several series of compounds and tested their antibacterial activities against Escherichia coli and Pseudomonas aeruginosa in vitro. Structure-activity relations are discussed. The metabolism stability of YDL-2, YDL-5, YDL-8, YDL-14, YDL-20-YDL-23 were evaluated in liver microsomes, which indicated that the 2-amino iso-Pr group may be a preferred structure than the 2-hydroxy Et group in the design of LpxC inhibitors. In addition to this study using Methyl 5-bromopicolinate, there are many other studies that have used Methyl 5-bromopicolinate(cas: 29682-15-3SDS of cas: 29682-15-3) was used in this study.

Methyl 5-bromopicolinate(cas: 29682-15-3) 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.SDS of cas: 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2018,Kim, Jun Ki; Lim, Hwan Jung; Jeong, Kyung Chae; Park, Seong Jun published 《One-pot sequential synthesis of tetrasubstituted thiophenes via sulfur ylide-like intermediates》.Beilstein Journal of Organic Chemistry published the findings.HPLC of Formula: 31106-82-8 The information in the text is summarized as follows:

A novel approach for the practical synthesis of tetrasubstituted thiophenes was developed. The mechanism for this reaction was based on the formation of a sulfur ylide-like intermediate. It was clearly suggested by (i) the intramol. cyclization of ketene N,S-acetals to the corresponding thiophenes, (ii) 1H NMR studies of Meldrum’s acid-substituted aminothioacetals and (iii) substitution studies of the methoxy group on Meldrum’s acid containing N,S-acetals. Notably, in terms of structural effects on the reactivity and stability of sulfur ylide-like intermediates, 2-pyridyl substituted compound exhibited superior properties over those of others. In the experiment, the researchers used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8HPLC of Formula: 31106-82-8)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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. HPLC of Formula: 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Journal of Heterocyclic Chemistry included an article by Heppell, Jacob T.; Islam, Amirul Md.; McAlpine, Shelli R.; Al-Rawi, Jasim M. A.. Synthetic Route of C5H6BNO2. The article was titled 《Functionalization of Quinazolin-4-ones Part 3: Synthesis, Structures Elucidation, DNA-PK, PI3K, and Cytotoxicity of Novel 8-Aryl-2-morpholino-quinazolin-4-ones》. The information in the text is summarized as follows:

A series of novel 8-aryl-2-morpholino quinazolines I (X = H, Cl; Ar = C6H5, 4-ClC6H4, 3-pyridyl, etc.) and II (X = H, Cl; R1 = Me, Bn; Ar = C6H5, 4-MeOC6H4, 3-H2NC6H4, etc.) were synthesized from the precursor 2-thioxo quinazolin-4-one. The compounds I and II were assayed for DNA-dependent protein kinase (DNA-PK) and phosphatidylinositol 3-kinase (PI3K). All compounds showed low DNA-PK % inhibition activity at 10 μM compound concertation, and the compound I (X = H; Ar = dibenzo[b,d]thiophen-4-yl) was most active with 38% inhibition. Similar pattern of PI3K α, β, γ, and δ isoforms inhibition activity at 10 μM were observed and the most active isoform was PI3K δ of 41% inhibition for compound I (X = Cl; Ar = dibenzo[b,d]thiophen-4-yl). Most compounds were less active than expected in spite of the strong structural resemblance to known inhibitors. Loss of activity could be attributed to the tautomerization to the aromatic enol (4-OH), which could specify that the carbonyl (C=O) group is important functional group for the activity. Selected compounds displayed appreciable cytotoxicity and compound I (X = Cl; Ar = dibenzo[b,d]thiophen-4-yl) exhibiting the greatest activity with an IC50 of 9.95 μM, therefore, the mechanism of the cytotoxicity of this compd, were not through DNA-PK or PI3K inhibition activity. The experimental part of the paper was very detailed, including the reaction process of Pyridin-3-ylboronic acid(cas: 1692-25-7Synthetic Route of C5H6BNO2)

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Synthetic Route of C5H6BNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,European Journal of Inorganic Chemistry included an article by Wang, Ping; Liang, Guangchao; Boyd, Chanteal Laquita; Webster, Charles Edwin; Zhao, Xuan. Electric Literature of C6H7Br2N. The article was titled 《Catalytic H2 Evolution by a Mononuclear Cobalt Complex with a Macrocyclic Pentadentate Ligand》. The information in the text is summarized as follows:

The use of H2 as fuel is considered as a potential solution for future energy demand, and there has been great interest in the design of metal catalysts for the H2 evolution from water with light and/or electricity over the past years. A mononuclear water soluble polypyridyl cobalt complex [Co(N4-Py)(H2O)](PF6)3 (4b) (N4-Py = N-methylpyridine-2,11-diaza[3,3](2,6)pyridinophane) was synthesized and characterized by elemental anal., mass spectrum, electrochem., and theor. calculations 4B can catalyze both electro- and photocatalytic H2 production in aqueous solutions Photocatalytic H2 production is achieved with a turnover number (TON) of 200 at pH 6 while electrolytic H2 production is accomplished with a TON of 140 at pH 7. Results from DFT computations indicate that the pentacoordinated CoII species is the active catalyst in the homogeneous H2 evolution by 4b, and the generation of H2 from a CoII-H species occurring via mononuclear heterolytic coupling is favorable by -23.0 kcal/mol. In the experimental materials used by the author, we found 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Electric Literature of C6H7Br2N)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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. Electric Literature of C6H7Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,ACS Medicinal Chemistry Letters included an article by Harrison, Tyler J.; Bauer, Daniel; Berdichevsky, Alina; Chen, Xin; Duvadie, Rohit; Hoogheem, Benjamin; Hatsis, Panos; Liu, Qian; Mao, Justin; Miduturu, Vasumathy; Rocheford, Erik; Zecri, Frederic; Zessis, Richard; Zheng, Rui; Zhu, Qingming; Streeper, Ryan; Patel, Sejal J.. Application of 13534-97-9. The article was titled 《Successful Strategies for Mitigation of a Preclinical Signal for Phototoxicity in a DGAT1 Inhibitor》. The information in the text is summarized as follows:

Diacylglycerol O-acyltransferase 1 (DGAT1) inhibitor Pradigastat (1) was shown to be effective at decreasing postprandial triglyceride levels in a patient population with familial chylomicronemia syndrome (FCS). Although pradigastat does not cause photosensitization in humans at the high clin. dose of 40 mg, a pos. signal was observed in preclin. models of phototoxicity. Herein, we describe a preclin. phototoxicity mitigation strategy for diarylamine containing mols. utilizing the introduction of an amide or suitable heterocyclic function. This strategy led to the development of two second-generation compounds with low risk of phototoxicity, disparate exposure profiles, and comparable efficacy to 1 in a rodent lipid bolus model for post-prandial plasma triglycerides. After reading the article, we found that the author used 6-Bromopyridin-3-amine(cas: 13534-97-9Application of 13534-97-9)

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. The reaction of alkyl halides, R―X, where X is a halogen, or analogous reagents with ammonia (or amines) is useful with certain compounds. Not all alkyl halides are effective reagents; the reaction is sluggish with secondary alkyl groups and fails with tertiary ones. Its usefulness is largely confined to primary alkyl halides (those having two hydrogen atoms on the reacting site).Application of 13534-97-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem