Month: October 2022

Gleave, Robert J.; Beswick, Paul J.; Brown, Andrew J.; Giblin, Gerard M. P.; Haslam, Carl P.; Livermore, David; Moses, Andrew; Nicholson, Neville H.; Page, Lee W.; Slingsby, Brian; Swarbrick, Martin E. published their research in Bioorganic & Medicinal Chemistry Letters on December 1 ,2009. The article was titled 《2-Amino-5-aryl-pyridines as selective CB2 agonists: Synthesis and investigation of structure-activity relationships》.Related Products of 102645-33-0 The article contains the following contents:

2-Amino-5-aryl-pyridines e.g. I, had been identified as a synthetically tractable series of CB2 agonists from a high-throughput screen of the GlaxoSmithKline compound collection. The results of an investigation of the structure-activity relationships (SAR) which led to the identification a number of potent and selective agonists are described. After reading the article, we found that the author used 2,5-Dichloroisonicotinaldehyde(cas: 102645-33-0Related Products of 102645-33-0)

2,5-Dichloroisonicotinaldehyde(cas: 102645-33-0) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Related Products of 102645-33-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Palladium-catalyzed Heck cyclization/carbonylation with formates: synthesis of azaindoline-3-acetates and furoazaindolines》 were Ye, Hao; Wu, Linhui; Zhang, Minrui; Jiang, Guomin; Dai, Hong; Wu, Xin-Xing. And the article was published in Chemical Communications (Cambridge, United Kingdom) in 2022. Recommanded Product: 39856-58-1 The author mentioned the following in the article:

Herein a palladium-catalyzed domino cyclization/carbonylation to access ester-functionalized azaindolines, e.g., I applying formates, e.g., phenylformate as a convenient carbonyl source was reported. All four azaindoline isomers were constructed, exhibiting good functional group compatibility. On this basis, modifying the starting tether on the aminopyridine led to furoazaindolines, e.g., II via an intramol. reductive cyclization after the palladium-catalyzed process. The experimental part of the paper was very detailed, including the reaction process of 2-Bromopyridin-3-amine(cas: 39856-58-1Recommanded Product: 39856-58-1)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Milder oxidation, using reagents such as NaOCl, can remove four hydrogen atoms from primary amines of the type RCH2NH2 to form nitriles (R―C≡N), and oxidation with reagents such as MnO2 can remove two hydrogen atoms from secondary amines (R2CH―NHR′) to form imines (R2C=NR′). Tertiary amines can be oxidized to enamines (R2C=CHNR2) by a variety of reagents.Recommanded Product: 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2014,Guan, Aiying; Li, Huichao; Li, Zhinian; Yang, Fan; Xie, Yong; Yang, Xiaoping; Liu, Changling published 《N-Phenyl heteroarylamine analogues of fluazinam using the intermediate derivatization methods approach》.Journal of Chemical Sciences (Bangalore, India) published the findings.Recommanded Product: 6-Bromopyridin-3-amine The information in the text is summarized as follows:

Twenty-one N-Ph heteroarylamine analogs of fluazinam were prepared via nucleophilic substitution reaction of 2,6-dichloro-3,5-dinitrotoluene with heteroarylamines using the intermediate derivatization method. 2,6-Dichloro-3,5-dinitrotoluene, the key intermediate, was synthesized by nitration of 2,6-dichlorotoluene. Preliminary bioassays indicated that most of the compounds showed good fungicidal activity against rice blast. The activity of I was equal to that of fluazinam. The relationship between mol. structure and biol. activity suggested that introduction of electron-withdrawing groups in the pyridine ring was important for optimizing fungicidal activity against rice blast. The results came from multiple reactions, including the reaction of 6-Bromopyridin-3-amine(cas: 13534-97-9Recommanded Product: 6-Bromopyridin-3-amine)

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Milder oxidation, using reagents such as NaOCl, can remove four hydrogen atoms from primary amines of the type RCH2NH2 to form nitriles (R―C≡N), and oxidation with reagents such as MnO2 can remove two hydrogen atoms from secondary amines (R2CH―NHR′) to form imines (R2C=NR′). Tertiary amines can be oxidized to enamines (R2C=CHNR2) by a variety of reagents.Recommanded Product: 6-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Pagire, Santosh K.; Kreitmeier, Peter; Reiser, Oliver published 《Visible-Light-Promoted Generation of α-Ketoradicals from Vinyl-bromides and Molecular Oxygen: Synthesis of Indenones and Dihydroindeno[1,2-c]chromenes》.Angewandte Chemie, International Edition published the findings.Related Products of 128071-75-0 The information in the text is summarized as follows:

Ortho-alkynylated α-bromocinnamates can be converted by a visible-light-mediated photocascade reaction with mol. oxygen into either indenones or dihydroindeno[1,2-c]chromenes. The one-step process features key photochem. steps, i.e., the initial activation of vinyl bromides through energy transfer to give α-ketoradicals in a reaction with mol. oxygen, followed by α-oxidation of an arene moiety by 6-π electrocyclization and subsequent hydroxylation by an electron-transfer process from the same photocatalyst leads to the dihydroindeno[1,2-c]chromenes. In the experiment, the researchers used 2-Bromonicotinaldehyde(cas: 128071-75-0Related Products of 128071-75-0)

2-Bromonicotinaldehyde(cas: 128071-75-0) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Related Products of 128071-75-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Keylor, Mitchell H.; Niemeyer, Zachary L.; Sigman, Matthew S.; Tan, Kian L. published 《Inverting Conventional Chemoselectivity in Pd-Catalyzed Amine Arylations with Multiply Halogenated Pyridines》.Journal of the American Chemical Society published the findings.Formula: C5H3BrClN The information in the text is summarized as follows:

A new catalyst system capable of selective chloride functionalization in the Pd-catalyzed amination of 3,2- and 5,2- Br/Cl-pyridines is reported. A reaction optimization strategy employing ligand parametrization led to the identification of 1,1′-bis[bis(dimethylamino)phosphino]ferrocene “”DMAPF””, a readily available yet previously unutilized diphosphine, as a uniquely effective ligand for this transformation. In the part of experimental materials, we found many familiar compounds, such as 5-Bromo-2-chloropyridine(cas: 53939-30-3Formula: C5H3BrClN)

5-Bromo-2-chloropyridine(cas: 53939-30-3) 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. Formula: C5H3BrClN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Chemical Communications (Cambridge, United Kingdom) included an article by Yang, Fei; Liu, Caiping; Yin, Di; Xu, Yanqing; Wu, Mingyan; Wei, Wei. Application of 1692-25-7. The article was titled 《Atropisomer-based construction of macrocyclic hosts that selectively recognize tryptophan from standard amino acids》. The information in the text is summarized as follows:

A syn-atropisomer of naphthalene diimide as a highly preorganized precursor was used to construct a type of trapezoid-shape macrocycle, namely ′trapezoid′ mol. boxes (TBox). As supramol. hosts, TBox can bind electron-rich guests and selectively recognize free tryptophan and tryptophanyl residues from 20 standard amino acids. After reading the article, we found that the author used Pyridin-3-ylboronic acid(cas: 1692-25-7Application of 1692-25-7)

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.Application of 1692-25-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Chemical Communications (Cambridge, United Kingdom) included an article by Chen, Jian; Zhu, Shengqing; Qin, Jian; Chu, Lingling. Recommanded Product: 100-48-1. The article was titled 《Intermolecular, redox-neutral azidoarylation of alkenes via photoredox catalysis》. The information in the text is summarized as follows:

An intermol., redox-neutral azidoarylation of alkenes with pyridines and TMSN3 was reported via visible light-induced photoredox catalysis. This protocol utilized a radical addition/radical coupling sequence, allowing for facile and regioselective installation of versatile β-azido pyridines under redox-neutral and mild conditions. In the experiment, the researchers used 4-Cyanopyridine(cas: 100-48-1Recommanded Product: 100-48-1)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Recommanded Product: 100-48-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Electrochemical Reduction of the Carbonyl Functional Group: The Importance of Adsorption Geometry, Molecular Structure, and Electrode Surface Structure》 were Bondue, Christoph J.; Koper, Marc T. M.. And the article was published in Journal of the American Chemical Society in 2019. HPLC of Formula: 1122-54-9 The author mentioned the following in the article:

This paper studies the electrochem. hydrogenation of the carbonyl functional group of acetophenone and 4-acetylpyridine at platinum single-crystal electrodes. Comparison with results obtained for the hydrogenation of acetone featuring an isolated carbonyl functional group reveals the influence of the Ph ring and the pyridine ring, resp. Lack of acetone adsorption at Pt(111) and Pt(100) due to a weak interaction between surface and carbonyl functional group renders these surfaces inactive for the hydrogenation of acetone. Adsorption through a strong interaction with the Ph ring of acetophenone activates the Pt(111) and Pt(100) surfaces for hydrogenation of the acetyl substituent. In agreement with previous results for acetone reduction, the Pt(100) surface is specifically active for the hydrogenolysis reaction, breaking the C-O bond, whereas the other surfaces only hydrogenate the carbonyl functionality. In contrast to the Ph ring, the pyridine ring has a very different effect: due to the dominant interaction of the N atom of the pyridine ring with the platinum electrode, a vertical adsorption mode is realized. The resulting large phys. distance between the carbonyl functional group and the electrode surface inhibits the hydrogenation at all platinum surfaces. This also holds for the Pt(110) electrode, which is otherwise active for the electrochem. hydrogenation of the isolated carbonyl functional group of aliphatic ketones. Our results show how the combination of mol. structure of the reactant and surface structure of the catalyst determine the selective electroreduction of functionalized ketones.4-Acetylpyridine(cas: 1122-54-9HPLC of Formula: 1122-54-9) was used in this study.

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. HPLC of Formula: 1122-54-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Ligand-free copper-catalyzed regio- and stereoselective 1,1-alkylmonofluoroalkylation of terminal alkynes》 was written by Lv, Yunhe; Pu, Weiya; Wang, Xiaoxing. Category: pyridine-derivatives And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:

The copper-catalyzed highly regio- and stereoselective 1,1-alkylmonofluoroalkylation of terminal alkynes with α-chloroacetamides and dialkyl 2-fluoromalonate or 2-fluoro-N,N-dialkyl-3-oxobutanamide without an external ligand was realized. With this novel methodol., (E)-β-monofluoroalkyl-β,γ-unsaturated amides containing quaternary C-F centers I [R = CH2OMe, 3-thienyl, Ph, etc.] could be easily constructed in good to excellent yields. The experimental part of the paper was very detailed, including the reaction process of 4-Ethynylpyridine(cas: 2510-22-7Category: pyridine-derivatives)

4-Ethynylpyridine(cas: 2510-22-7) 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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Xia, Dong; Duan, Xin-Fang published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Tandem vinyl radical Minisci-type annulation on pyridines: one-pot expeditious access to azaindenones》.Category: pyridine-derivatives The article contains the following contents:

A new regiospecific alkylative/alkenylative cascade annulation of pyridines e.g., I has been achieved while the corresponding classic Minisci alkylative annulation failed. This protocol provides a novel and expeditious access to azaindenones and related compounds e.g., II via cross-dehydrogenative coupling with the long-standing problem of C2/C4 regioselectivity of pyridines being well addressed. In addition to this study using Pyridin-3-ylboronic acid, there are many other studies that have used Pyridin-3-ylboronic acid(cas: 1692-25-7Category: pyridine-derivatives) was used in this study.

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem