Day: December 30, 2022

Electrochemical Intramolecular C-H Amination: Synthesis of Benzoxazoles and Benzothiazoles was written by Morofuji, Tatsuya;Shimizu, Akihiro;Yoshida, Jun-ichi. And the article was included in Chemistry – A European Journal in 2015.COA of Formula: C11H9NO This article mentions the following:

A new method for metal-free intramol. C-H amination has been developed. Electrochem. oxidation of 2-pyrimidyloxybenzenes and 2-pyrimidylthiobenzenes, which can be easily prepared from phenols and thiophenols, resp., followed by the treatment of the resulting pyrimidinium ions with piperidine gives 2-aminobenzoxazoles and 2-aminobenzothiazoles, resp. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0COA of Formula: C11H9NO).

2-Phenoxypyridine (cas: 4783-68-0) 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.COA of Formula: C11H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lewis Basic Salt-Promoted Organosilane Coupling Reactions with Aromatic Electrophiles was written by Reidl, Tyler W.;Bandar, Jeffrey S.. And the article was included in Journal of the American Chemical Society in 2021.HPLC of Formula: 3939-14-8 This article mentions the following:

Lewis basic salts promoted organotrimethylsilane coupling with (hetero)aryl nitriles, sulfones and chlorides as a new route to 1,1-diarylalkanes. This method combined the substrate modularity and selectivity characteristic of cross-coupling with the practicality of a base-promoted protocol. In addition, a Lewis base strategy enabled a complementary scope to existing methods, employed stable and easily prepared organosilanes and achieved selective arylation in the presence of acidic functional groups. The utility of this method was demonstrated by the synthesis of pharmaceutical analogs and its use in multicomponent reactions. In the experiment, the researchers used many compounds, for example, 2-Fluoroisonicotinonitrile (cas: 3939-14-8HPLC of Formula: 3939-14-8).

2-Fluoroisonicotinonitrile (cas: 3939-14-8) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. 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: 3939-14-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Molecular orbital study of some aromatic N-oxide systems was written by Chadha, Rita. And the article was included in Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical & Analytical in 1986.Recommanded Product: 3718-65-8 This article mentions the following:

The effect of substituents on the π-electronic charge distributions in a set of monosubstituted pyridine N-oxides has been analyzed by means of PPP calculations The electronic charge distribution in the ring has been used to predict the electrophilic and nucleophilic reactivities of these systems. The UV spectra of some N-oxide systems have also been calculated and compared with the exptl. ones. The π-electronic charges, bond orders and energies of MOs have been correlated with exptl. quantities such as the proton magnetic resonance chem. shifts, IR stretching frequencies and polarog. half-wave reduction potentials. The unrestricted-Hartree-Fock method of Amos and Snyder (1964) has been used to calculate the spin d. distributions in some N-oxide radical anions. Empirical relation between the spin densities and exptl. ESR hyperfine splitting constants have been derived. In the experiment, the researchers used many compounds, for example, 3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8Recommanded Product: 3718-65-8).

3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8) 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 groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Recommanded Product: 3718-65-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Novel heteroaryl replacements of aromatic 3-tetrafluoroethoxy substituents in trifluoro-3-(tertiary amino)-2-propanols as potent inhibitors of cholesteryl ester transfer protein was written by Massa, M. A.;Spangler, D. P.;Durley, R. C.;Hickory, B. S.;Connolly, D. T.;Witherbee, B. J.;Smith, M. E.;Sikorski, J. A.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2001.Related Products of 175205-82-0 This article mentions the following:

A series of novel N,N-disubstituted trifluoro-3-amino-2-propanols, e.g., I, has been prepared as potent inhibitors of cholesteryl ester transfer protein. Modifying the aromatic 3-tetrafluoroethoxy group in the lead mol. (II) with various heteroaryl moieties produced new 2-furyl analogs with submicromolar potency in vitro. In the experiment, the researchers used many compounds, for example, 2-Bromo-3-(trifluoromethyl)pyridine (cas: 175205-82-0Related Products of 175205-82-0).

2-Bromo-3-(trifluoromethyl)pyridine (cas: 175205-82-0) 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, 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. Related Products of 175205-82-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Thermic reaction of thiopyridones was written by Krowicki, Krzysztof. And the article was included in Polish Journal of Chemistry in 1978.Formula: C11H9NO This article mentions the following:

4-Pyridinethione (I) was heated in refluxing decalin containing heptanal to give 90% R₂S (R = 4-pyridinyl). I was heated with 3-pyridinethiol, PhSH, and PhOH to give 3,4′-dipyridyl sulfide, RSPh, and ROPh; resp. 2-Pyridinethione underwent analogous transformations. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Formula: C11H9NO).

2-Phenoxypyridine (cas: 4783-68-0) 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. 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: C11H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Fragment-Based Discovery of Low-Micromolar ATAD2 Bromodomain Inhibitors was written by Demont, Emmanuel H.;Chung, Chun-wa;Furze, Rebecca C.;Grandi, Paola;Michon, Anne-Marie;Wellaway, Chris;Barrett, Nathalie;Bridges, Angela M.;Craggs, Peter D.;Diallo, Hawa;Dixon, David P.;Douault, Clement;Emmons, Amanda J.;Jones, Emma J.;Karamshi, Bhumika V.;Locke, Kelly;Mitchell, Darren J.;Mouzon, Bernadette H.;Prinjha, Rab K.;Roberts, Andy D.;Sheppard, Robert J.;Watson, Robert J.;Bamborough, Paul. And the article was included in Journal of Medicinal Chemistry in 2015.COA of Formula: C10H13ClN2O2 This article mentions the following:

Overexpression of ATAD2 (ATPase family, AAA domain containing 2) has been linked to disease severity and progression in a wide range of cancers, and is implicated in the regulation of several drivers of cancer growth. Little is known of the dependence of these effects upon the ATAD2 bromodomain, which has been categorized as among the least tractable of its class. The absence of any potent, selective inhibitors limits clear understanding of the therapeutic potential of the bromodomain. Here, the authors describe the discovery of a hit from a fragment-based targeted array. Optimization of this produced the first known micromolar inhibitors of the ATAD2 bromodomain, e.g. I. In the experiment, the researchers used many compounds, for example, (2-Chloro-pyridin-3-yl)-carbamic acid tert-butyl ester (cas: 209798-48-1COA of Formula: C10H13ClN2O2).

(2-Chloro-pyridin-3-yl)-carbamic acid tert-butyl ester (cas: 209798-48-1) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. 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.COA of Formula: C10H13ClN2O2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Syntheses, structural characterization and fluorescent properties of 3D copper(I) coordination polymers with extended π···π interactions was written by Huang, Ting-hong;Zhu, Sheng-lan;Yang, Hu;Zhao, Bin;Yang, Yan. And the article was included in Wuji Huaxue Xuebao in 2016.Quality Control of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole This article mentions the following:

Two copper(I) coordination polymers, {[Cu₄(4-bpo)₄(CH₃CN)₄](BF₄)₄}_n (1) and {[Cu₃(4-bpo)₂(4,4′-bipy)(CH₃CN)₆](BF₄)₃}_n (2) (4,4′-bipy = 4,4′-bipyridine, 4-bpo = 2,5-bis(4-pyridyl)-1,3,4-oxadiazole), have been synthesized and characterized by IR, ¹H NMR, ¹⁹F NMR, ¹¹B NMR and x-ray crystal structure anal. Structural anal. shows that complex 1 contains repeat “8”-shape building units that are linked to each other by the bridging coordination action of 4-bpo, forming a 3D network. The introduction of 4,4′-bipyridine results in the size variance of complex 2, which consists of 1D meso-helical chain, 2D multilayer architecture and 3D network formed by intermol. π···π interactions and hydrogen bonds. All these indicate that the change of secondary ligand might be the key of the extended supramol. networks of the lower-dimensional coordination polymers. Moreover, solid-state emission spectrum of complex 1 displays the existence of ILCT excited states. CCDC: 1043969, 1; 1043970, 2. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Quality Control 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. 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.Quality Control of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Revisiting the Role of Hydrogen Bonding in the Strong Dimer Superexchange of a 2D Copper(II) Halide Honeycomb-Like Lattice: Structural and Magnetic Study was written by Monroe, Jeffrey C.;Carvajal, M. Angels;Deumal, Merce;Landee, Christopher P.;Rademeyer, Melanie;Turnbull, Mark M.. And the article was included in Inorganic Chemistry in 2020.Category: pyridine-derivatives This article mentions the following:

The title compound H₂L(CuCl₃H₂O)Cl (H₂L = 1-(4′-pyridinium)pyridin-4-ol-ium), (1) was synthesized and investigated structurally and magnetically as well as via a first-principles, bottom-up theor. anal. of the potential magnetic superexchange pathways. Compound 1 can be described structurally as a well-isolated, distorted 2D-honeycomb lattice with two potential exchange pathways: a dimeric interaction via hydrogen-bonded pairs of (CuCl₃H₂O) ions and a chain structure via bridging chloride ions. Surprisingly, the exptl. magnetic data are best fitted using both a simple dimer model with a Curie-Weiss correction for interdimer exchange (J_dimer = -107.4(1) K, θ = -1.22(4) K) and a strong-rung ladder model (J_rung = -105.8(7) K, J_rail = 2(7) K). Theor. anal. at the UB3LYP/6-31+G(d) level supports the strong exchange observed through the [CuCl₄(H₂O)]^2- dimer moiety superexchange pathway (-102 K = -71 cm^-1). However, the apparent vanishingly small exchange through the single halide bridge is merely a brute average of competing ferromagnetic (FM) (+24.8 K = +17.0 cm^-1) and antiferromagnetic (AFM) (-21.0 K = -14.6 cm^-1) exchange interactions. Our computational study shows that these fitting parameters carry no phys. meaning since a honeycomb plaquette must be taken as magnetic building block for 1. The competition between FM and AFM pair interactions leads to geometrical frustration in 1 and could induce interesting magnetic response at low temperatures, if the magnetic exchange is adequately tuned by modifying substituents in ligands and, in turn, interactions within the crystal packing. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Category: pyridine-derivatives).

Pyridin-4-ol (cas: 626-64-2) 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. 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

FragLites-Minimal, Halogenated Fragments Displaying Pharmacophore Doublets. An Efficient Approach to Druggability Assessment and Hit Generation was written by Wood, Daniel J.;Lopez-Fernandez, J. Daniel;Knight, Leanne E.;Al-Khawaldeh, Islam;Gai, Conghao;Lin, Shengying;Martin, Mathew P.;Miller, Duncan C.;Cano, Celine;Endicott, Jane A.;Hardcastle, Ian R.;Noble, Martin E. M.;Waring, Michael J.. And the article was included in Journal of Medicinal Chemistry in 2019.Quality Control of (4-Bromopyridin-2-yl)methanol This article mentions the following:

Identifying ligand binding sites on proteins is a critical step in target-based drug discovery. Current approaches to this require resource-intensive screening of large libraries of lead-like or fragment mols. Here, we describe an efficient and effective exptl. approach to mapping interaction sites using a set of halogenated compounds expressing paired hydrogen-bonding motifs, termed FragLites. The FragLites identify productive drug-like interactions, which are identified sensitively and unambiguously by X-ray crystallog., exploiting the anomalous scattering of the halogen substituent. This mapping of protein interaction surfaces provides an assessment of druggability and can identify efficient start points for the de novo design of hit mols. incorporating the interacting motifs. The approach is illustrated by mapping cyclin-dependent kinase 2, which successfully identifies orthosteric and allosteric sites. The hits were rapidly elaborated to develop efficient lead-like mols. Hence, the approach provides a new method of identifying ligand sites, assessing tractability and discovering new leads. pharmacophore double. In the experiment, the researchers used many compounds, for example, (4-Bromopyridin-2-yl)methanol (cas: 131747-45-0Quality Control of (4-Bromopyridin-2-yl)methanol).

(4-Bromopyridin-2-yl)methanol (cas: 131747-45-0) 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. Quality Control of (4-Bromopyridin-2-yl)methanol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Palladium-Catalyzed Hydrocarbonylative Cyclization Enabled by Formal Insertion of Aromatic C=N Bonds into Pd-Acyl Bonds was written by Zhou, Xibing;Chen, Anrong;Du, Wei;Wang, Yawen;Peng, Yu;Huang, Hanmin. And the article was included in Organic Letters in 2019.Recommanded Product: Ethyl 2-bromoisonicotinate This article mentions the following:

An efficient new formal insertion strategy via combination of reductive elimination and oxidative addition sequence was reported, in which the transient N-acyliminium ions formed via hydrocarbonylation function as key intermediates. This strategy has enabled a novel palladium-catalyzed hydrocarbonylative cyclization of azaarene-tethered alkenes or dienes via sequential insertion of a C=C bond, CO, and a C=N bond into palladium-hydride bonds. This method provides a new and highly efficient synthetic approach to quinolizinones and its derivatives with extended π-conjugated systems, possessing tunable emission wavelengths and good photoluminescence capabilities. In the experiment, the researchers used many compounds, for example, Ethyl 2-bromoisonicotinate (cas: 89978-52-9Recommanded Product: Ethyl 2-bromoisonicotinate).

Ethyl 2-bromoisonicotinate (cas: 89978-52-9) 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. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Recommanded Product: Ethyl 2-bromoisonicotinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem