Category: pyridine-derivatives

Xie, Wuchen; Wang, Meng; Yang, Siyu; Chen, Yadong; Feng, Jie; Huang, Yatian published the artcile< C-H chlorination of (hetero)anilines via photo/organo co-catalysis>, Computed Properties of 22961-45-1, the main research area is chloro aniline chemoselective preparation photochem; aniline carbon hydrogen chlorination catalyst tetra carbazolyl benzenedicarbonitrile chlorosuccinimide.

Herein, a photo-redox and organo co-catalyzed chlorination method for anilines to gave chloro-anilines ArNR1R2 [Ar = 4-ClC6H4, 3,4-di-Cl-5-FC6H2, 4-Cl-2,5-di-FC6H2, etc.; R1 = H, Me; R2 = H, Me, C(O)Me, Ph, pyrimidin-2-yl; R1R2 = (CH2)2N(CH3)(CH2)2] was disclose. This method had great substrate generality and excellent mono-chlorination selectivity. Another merit of this method was the late-stage modification of drug mols., which would be useful in medicinal chem.

Organic & Biomolecular Chemistry published new progress about Anilines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 22961-45-1 belongs to class pyridine-derivatives, and the molecular formula is C11H10N2, Computed Properties of 22961-45-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Babaev, Eugene V.; Rybakov, Victor B. published the artcile< Phenacylation of 6-methyl-beta-nitropyridin-2-ones and further heterocyclization of products>, SDS of cas: 22280-62-2, the main research area is betanitropyridinone phenacylation; phenacylpyridone heterocyclization; 8-nitro-5-RO-indolizines; Phenacylation of beta-nitropyridin-2-ones; oxazole-pyrrole ring transformation.

Reaction between the derivatives of 6-methyl-beta-nitropyridin-2-one and phenacyl bromides was studied, and the yields observed were extremely low. The pyridones were converted via chloropyridines to methoxyderivatives, which were N-phenacylated. N-Phenacyl derivatives of 4,6-dimethyl-5-nitropyridin-2-one under the action of base gave 5-hydroxy-8-nitroindolizine and under acidic conditions gave 5-methyl-6-nitrooxazole[3,2-a]pyridinium salt, which underwent recyclization with MeONa to 5-methoxy-8-nitroindolizine.

Molecules published new progress about Acylation. 22280-62-2 belongs to class pyridine-derivatives, and the molecular formula is C6H7N3O2, SDS of cas: 22280-62-2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lantz, Erik; El Mokadem, Roukaya; Schoch, Tim; Fleske, Tyler; Weaver, Jimmie D. III published the artcile< A new twist for Stork-Danheiser products enabled by visible light mediated trans-cyclohexene formation; access to acyclic distal enones>, Related Products of 370878-69-6, the main research area is acyclic distal enone preparation; cycloalkenol ring opening isomerization photocatalyst.

Herein, the use of visible light to indirectly drive ring opening in unstrained 6- and 7-membered ring systems via reaction with a transiently generated trans-cycloalkene was investigated. Identification of conditions that captured visible light energy in the form of ring strain was key to success. Under mildly acidic conditions, cycloalkenols were shown to undergo formally endothermic ring-opening isomerization to give acyclic exo-methylene and distal ketones or aldehydes in high yields. Ultimately, this work demonstrated the ability of cycloalkenes to capture visible light energy and its use to drive both kinetically and thermally unfavorable rearrangements.

Chemical Science published new progress about Cycloalkenols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 370878-69-6 belongs to class pyridine-derivatives, and the molecular formula is C33H21F3IrN3, Related Products of 370878-69-6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Khlebnikov, Vladimir; Patel, Kalpesh; Zhou, Xiaojian; Reddy, M. Madhava; Su, Zhuoyi; Chiacchia, Fabrizio S.; Hansen, Henrik C. published the artcile< Synthesis of 2-aryl-4H-pyrano[2,3-b]pyridin-4-ones by a one-pot deprotection-cyclization reaction>, Category: pyridine-derivatives, the main research area is arylpyranopyridinone preparation deprotection cyclization.

Preparation of 2-aryl-4H-pyrano[2,3-b]pyridin-4-ones is reported. A one-pot, two-step process starting with substituted 2-alkoxynicotinates and acetophenones in the presence of pyridinium hydrochloride is used. The methodol. is compatible with a series of functional groups useful for the synthesis of second generation analogs, as part of our structure/activity relationship program. The method proved to be scalable (>100 g), allowing for efficient synthesis of material to support animal studies.

Tetrahedron published new progress about Flavonoids Role: SPN (Synthetic Preparation), PREP (Preparation). 876919-08-3 belongs to class pyridine-derivatives, and the molecular formula is C7H6FNO2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Dong; Wang, Zhentao; Liu, Zhenlin; Huang, Mindong; Hu, Jianyong; Yu, Peng published the artcile< Strategic C-C Bond-Forming Dearomatization of Pyridines and Quinolines>, Recommanded Product: 3-(Methoxycarbonyl)pyridine, the main research area is regioselective diastereoselective tetrahydropyridine tetrahydroquinoline preparation one pot aromatization; dearomative double nucleophilic addition pyridine quinoline.

A one-pot protocol for the dearomative double nucleophilic addition to pyridines and quinolines, providing convenient, regioselective and diastereoselective access to tetrahydropyridines and tetrahydroquinolines under reductant-free conditions is described. This method also offers a new strategy for the general dearomatization of nitrogen heteroaromatics

Organic Letters published new progress about Crystal structure. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Recommanded Product: 3-(Methoxycarbonyl)pyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Groman, Aleksandra; Stolarczyk, Elobieta; Mucha, Mariola published the artcile< Purity determination of the starting materials used in the synthesis of pharmaceutical substances>, Electric Literature of 350-03-8, the main research area is bosentan imatinib ethylene glycol acetylpyridine GCFID.

High requirements for the API quality mean that the quality control of the starting material is crucial in the manufacturing process of drug substances. Three sensitive methods for the purity determination of the following starting materials: ethylene glycol (method I), 3-acetylpyridine (method II) and 4-chloromethyl-5- methyl-1,3-dioxol-2-one (method III) used in the syntheses of selected drug substances were developed using GC-FID techniques. All the methods were validated according to the International Conference on Harmonization guidelines. The correlation coefficient values were found to be about 0.99. The calculated RSD values from the replicate injections in the range of 20-120% of the nominal concentration ensured the precision of the methods.

Acta Poloniae Pharmaceutica published new progress about Drugs. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Electric Literature of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Brunello, Giulia; Becker, Kathrin; Scotti, Luisa; Drescher, Dieter; Becker, Juergen; John, Gordon published the artcile< The Effects of Three Chlorhexidine-Based Mouthwashes on Human Osteoblast-Like SaOS-2 Cells. An In Vitro Study>, Name: 1-Hexadecylpyridin-1-ium chloride, the main research area is chlorhexidine mouthwash human osteoblast cytotoxicity apoptosis; antiseptic; bone; cetylpyridinium chloride; chlorhexidine; mouthrinse; peri-implantitis; periodontitis.

Several decontamination methods for removing biofilm from implant surfaces during surgical peri-implantitis treatment have been reported, including the intraoperative usage of chlorhexidine (CHX)-based antiseptics. There is a lack of information on possible adverse effects on bone healing. The study aimed to examine the impact of three CHX-based mouthwashes on osteoblast-like cells (SaOS-2) in vitro. Cells were cultured for three days in 96-well binding plates. Each well was randomly treated for either 30, 60 or 120 s with 0.05% CHX combined with 0.05% cetylpyridinium chloride (CPC), 0.1% CHX, 0.2% CHX or sterile saline (NaCl) as control. Cell viability, cytotoxicity and apoptosis were assessed at day 0, 3 and 6. Cell viability resulted in being higher in the control group at all time points. At day 0, the CHX 0.2 group showed significantly higher cytotoxicity values compared to CHX 0.1 (30 s), CHX + CPC (30 s, 60 s and 120 s) and control (60 s and 120 s), while no significant differences were identified between CHX + CPC and both CHX 0.1 and NaCl groups. All test mouthwashes were found to induce apoptosis to a lower extent compared to control. Results indicate that 0.2% CHX presented the highest cytotoxic effect. Therefore, its intraoperative use should be carefully considered.

International Journal of Molecular Sciences published new progress about Antibacterial agents. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Name: 1-Hexadecylpyridin-1-ium chloride.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Buettelmann, Bernd; Alanine, Alexander; Bourson, Anne; Gill, Ramanjit; Heitz, Marie-Paule; Mutel, Vincent; Pinard, Emmanuel; Trube, Gerhard; Wyler, Rene published the artcile< 2-Styrylpyridines and 2-(3,4-dihydro-naphthalen-2-yl)pyridines as potent NR1/2B subtype selective NMDA receptor antagonists>, Application of C6H7BrN2, the main research area is styryl pyridine preparation NMDA receptor antagonist SAR; structure activity relationship NMDA receptor antagonist styryl pyridine; naphthalenyl pyridine preparation NMDA receptor antagonist SAR.

A series of 2-styryl-pyridines, e.g. I, and 2-(3,4-dihydro-naphthalen-2-yl)pyridines, e.g. II, was prepared and evaluated as NR1/2B subtype selective NMDA receptor antagonists. The SAR developed in this series resulted in the discovery of high affinity antagonists that are selective (vs. α1 and M1 receptors) and are active in vivo.

Chimia published new progress about NMDA receptor antagonists. 79055-59-7 belongs to class pyridine-derivatives, and the molecular formula is C6H7BrN2, Application of C6H7BrN2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dill, Ryan D.; Portillo, Romeo I.; Shepard, Samuel G.; Shores, Matthew P.; Rappe, Anthony K.; Damrauer, Niels H. published the artcile< Long-Lived Mixed 2MLCT/MC States in Antiferromagnetically Coupled d3 Vanadium(II) Bipyridine and Phenanthroline Complexes>, Product Details of C10H8N2, the main research area is antiferromagnetically Vanadium bipyridine phenanthroline complex; DFT Long Lived Mixed MLCT MC States; time resolved spectroscopy support spectroelectrochem computational; electronic spectroscopy Antiferromagnetic Vanadium Bipyridine Phenanthroline Complexes.

Exploration of [V(bpy)3]2+ and [V(phen)3]2+ (bpy = 2,2′-bipyridine; phen = 1,10-phenanthroline) using electronic spectroscopy reveals an ultrafast excited-state decay process and implicates a pair of low-lying doublets with mixed metal-to-ligand charge-transfer (MLCT) and metal-centered (MC) character. Transient absorption (TA) studies of the vanadium(II) species probing in the visible and near-IR, in combination with spectroelectrochem. techniques and computational chem., lead to the conclusion that after excitation into the intense and broad visible 4MLCT ← 4GS (ground-state) absorption band (ε400-700 nm = 900-8000 M-1 cm-1), the 4MLCT state rapidly (τisc < 200 fs) relaxes to the upper of two doublet states with mixed MLCT/MC character. Electronic interconversion (τ ~2.5-3 ps) to the long-lived excited state follows, which we attribute to formation of the lower mixed state. Following these initial dynamics, GS recovery ensues with τ = 430 ps and 1.6 ns for [V(bpy)3]2+ and [V(phen)3]2+, resp. This stands in stark contrast with isoelectronic [Cr(bpy)3]3+, which rapidly forms a long-lived doublet metal-centered (2MC) state following photoexcitation and lacks strong visible GS absorption character. 2MLCT character in the long-lived states of the vanadium(II) species produces geometric distortion and energetic stabilization, both of which accelerate nonradiative decay to the GS compared to [Cr(bpy)3]3+, where the GS and 2MC are well nested. These conclusions are significant because (i) long-lived states with MLCT character are rare in first-row transition-metal complexes and (ii) the presence of a 2MLCT state at lower energy than the 4MLCT state has not been previously considered. The spin assignment of charge-transfer states in open-shell transition-metal complexes is not trivial; when metal-ligand interaction is strong, low-spin states must be carefully considered when assessing reactivity and decay from electronic excited states. Metal-to-ligand charge-transfer (MLCT) states of vanadium(II) polypyridyl complexes are characterized by antiferromagnetic coupling, leading to exceptions to Hund′s rule of maximum multiplicity. Time-resolved spectroscopy, with support from spectroelectrochem. and computational studies, suggests mixing of the low-spin 2MLCT with doublet metal-centered states. This should be considered for the development of related complexes for photoredox catalysis. Inorganic Chemistry published new progress about Antiferromagnetic materials. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Product Details of C10H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bhattacharya, Ritwick; Daoud, Ismail; Chatterjee, Arnab; Chatterjee, Soumendranath; Saha, Nimai Chandra published the artcile< An integrated in silico and in vivo approach to determine the effects of three commonly used surfactants sodium dodecyl sulphate, cetylpyridinium chloride and sodium laureth sulphate on growth rate and hematology in Cyprinus carpio L>, SDS of cas: 123-03-5, the main research area is Cyprinus carpio sodium dodecyl sulfate cetylpyridinium chloride hematol; Homology modeling; erythropoietin; hydrogen bond; hydrophobic interaction; molecular docking; somatotropin.

The purpose of this work is to evaluate the homol. modeling, in silico prediction, and characterization of somatotropin and erythropoietin from Cyprinus carpio as well as mol. docking and simulation experiments between the modeled proteins and surfactants sodium dodecyl sulfate (SDS), sodium laureth sulfate (SLES) and cetylpyridinium chloride (CPC). Using the best fit template structure, homol. modeling of somatotropin and erythropoietin of Cyprinus carpio resp. was conducted. The model structures were improved further with 3Drefine, and the final 3D structures were verified with PROCHEK, ERRATA and ProQ. The physiochem., as well as the stereochem. parameters of the modeled proteins, were evaluated using ExPASy’s ProtParam. Mol. docking calculations, protein-ligand interactions, and protein flexibility anal. were carried out to determine the binding pattern of each ligand to the targeted proteins and their effect on the overall proteins’ conformation. Our in silico anal. showed that hydrophobic interactions with the active site amino acid residues of the modeled proteins (somatotropin and erythropoietin) were more prevalent than hydrogen bonds and salt bridges that affect the flexibility and stability of the somatotropin and erythropoietin as revealed from our protein flexibility anal. The in vivo anal. showed that sublethal concentrations of SDS, SLES, and CPC neg. affected the growth and hematol. parameters of Cyprinus carpio. Hence, it may be inferred from the study that the alterations in the flexibility of somatotropin and erythropoietin of Cyprinus carpio upon addition of SDS, CPC and SLES might be attributable to the reduction in growth and hematol. parameters.

Toxicology Mechanisms and Methods published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, SDS of cas: 123-03-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem