Category: pyridine-derivatives

Pan, Sheng-Dong; Shen, Hao-Yu; Zhou, Li-Xin; Chen, Xiao-Hong; Zhao, Yong-Gang; Cai, Mei-Qiang; Jin, Mi-Cong published the artcile< Controlled synthesis of pentachlorophenol-imprinted polymers on the surface of magnetic graphene oxide for highly selective adsorption>, Synthetic Route of 14121-36-9, the main research area is pentachlorophenol imprinted polymer surface magnetic graphene oxide adsorption.

A novel, well-designed magnetic graphene oxide sheet embedded with core-shell molecularly imprinted polymer microspheres (MGO@MIP) was controllably synthesized via a reflux-precipitation polymerization and surface imprinting technique. The as-prepared MGO@MIP was fully characterized and the specific selectivity and remarkable adsorption capacity to pentachlorophenol (PCP) are closely related to the synergetic effect of hydrogen bonding and π-π interactions, which are strongly associated with the solution pH and the distribution of magnetic microspheres on the surface of GO sheets. Under the optimal conditions, i.e., pH of 4.0 and a ratio of monomers to Fe3O4 of 15, the maximum adsorption capacity and the imprinting factor (α) of MGO@MIP towards PCP were 789.4 mg g-1 and 4.36, resp. The newly synthesized MGO@MIPs proved to be a great adsorbent for PCP in environmental water.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Adsorption. 14121-36-9 belongs to class pyridine-derivatives, and the molecular formula is C5HCl4N, Synthetic Route of 14121-36-9.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhao, Huaxin; Ma, Guobin; Xie, Xiaojuan; Wang, Yong; Hao, Jian; Wan, Wen published the artcile< Pd(II)-Catalyzed decarboxylative meta-C-H difluoromethylation>, Name: 2,4-Bipyridine, the main research area is difluoroacetic acid arylpyridine decarboxylative meta selective difluoromethylation palladium catalyst.

A palladium(II)-catalyzed decarboxylative meta-selective C-H difluoromethylation of arenes has been developed from easily accessible difluoroacetic acids. Initial mechanistic studies disclosed that a migratory insertion is involved in this meta-C-H functionalization.

Chemical Communications (Cambridge, United Kingdom) published new progress about Fluoromethylation (decarboxylative). 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Name: 2,4-Bipyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wandas, M.; Lorenc, J.; Kucharska, E.; Maczka, M.; Hanuza, J. published the artcile< Molecular structure and vibrational spectra of 3 (or 4 or 6)-methyl-5-nitro-2-pyridinethiones: FT-IR, FT-Raman and DFT quantum chemical calculations>, Recommanded Product: 2-Amino-3-nitro-6-picoline, the main research area is structure vibrational spectra methylnitropyridinethione FT IR Raman DFT quantum.

IR and Raman spectra (RS) of polycrystalline 3-(or 4 or 6)-methyl-5-nitro-2-pyridinethione were measured and analyzed by d. functional theory (DFT) quantum chem. calculations The B3LYP/6-311G(2d,2p) approach was applied for both the thiol and thione tautomers due to the possibility of the formation of these two thiole forms. Mol. structures of these compounds were optimized starting from different mol. geometries of the thiol group and thione group. Two conformations of the 2-mercaptopyridine, trans and cis, were taken into account. The studied compounds appear in the solid state in the thione form. The effect of the hydrogen-bond formation in the studied compounds was considered.

Journal of Raman Spectroscopy published new progress about Conformation. 21901-29-1 belongs to class pyridine-derivatives, and the molecular formula is C6H7N3O2, Recommanded Product: 2-Amino-3-nitro-6-picoline.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Choi, Hyukjae; Lee, Wonhwa; Kim, Eonmi; Ku, Sae-Kwang; Bae, Jong-Sup published the artcile< Inhibitory effects of collismycin C and pyrisulfoxin A on particulate matter-induced pulmonary injury>, Name: 2,2′-Bipyridine, the main research area is pulmonary injury collismycin C pyrisulfoxin A particulate matter; Akt; Collismycin C; Particulate matter; Pyrisulfoxin A; Vascular permeability.

Inhalation of fine particulate matter (PM2.5) is associated with elevated pulmonary injury caused by the loss of vascular barrier integrity. Marine microbial natural products isolated from microbial culture broths were screened for pulmonary protective effects against PM2.5. Two 2,2′-bipyridine compounds isolated from a red alga-associated Streptomyces sp. MC025-collismycin C (2) and pyrisulfoxin A (5)-were found to inhibit PM2.5-mediated vascular barrier disruption. To confirm the inhibitory effects of collismycin C and pyrisulfoxin A on PM2.5-induced pulmonary injury. In this study, we investigated the beneficial effects of collismycin C and pyrisulfoxin A on PM-induced lung endothelial cell (EC) barrier disruption and pulmonary inflammation. Permeability, leukocyte migration, proinflammatory protein activation, reactive oxygen species (ROS) generation, and histol. were evaluated in PM2.5-treated ECs and mice. Collismycin C and pyrisulfoxin A significantly scavenged PM2.5-induced ROS and inhibited the ROS-induced activation of p38 mitogen-activated protein kinase as well as activated Akt, which helped in maintaining endothelial integrity, in purified pulmonary endothelial cells. Furthermore, collismycin C and pyrisulfoxin A reduced vascular protein leakage, leukocyte infiltration, and proinflammatory cytokine release in the bronchoalveolar lavage fluid of PM-treated mice. These data suggested that collismycin C and pyrisulfoxin A might exert protective effects on PM-induced inflammatory lung injury and vascular hyperpermeability.

Phytomedicine published new progress about Bronchoalveolar lavage fluid. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Name: 2,2′-Bipyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zheng, Qiang; Kurpiewska, Katarzyna; Domling, Alexander published the artcile< SNAr Isocyanide Diversification>, COA of Formula: C6H8N2, the main research area is imino isocyanide preparation; isocyanide amine multicomponent nucleophilic aromatic substitution.

The first-time isocyanide diversification based on nucleophilic aromatic substitution of suitable precursor isocyanides like 1-fluoro-4-isocyano-2-nitrobenzene has been described. The mild conditions allow for easy access to multiple novel isocyanides I (R = morpholin-4-yl, pyrrolidin-1-yl, piperidin-1-yl, etc.) useful in organic synthesis. The resulting isocyanides I are solid and non-noxious, yet react nicely in multicomponent reactions.

European Journal of Organic Chemistry published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, COA of Formula: C6H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kim, Haewon; Yoo, Jean; Lim, Yeon-Mi; Kim, Eun-Ji; Yoon, Byung-Il; Kim, Pilje; Yu, Seung Do; Eom, Ig-Chun; Shim, Ilseob published the artcile< Comprehensive pulmonary toxicity assessment of cetylpyridinium chloride using A549 cells and Sprague-Dawley rats>, Application In Synthesis of 123-03-5, the main research area is pulmonary toxicity cetylpyridinium chloride; bronchoalveolar lavage fluid; cetylpyridinium chloride; inhalation toxicity; intratracheal instillation; polymorphonuclear leukocyte; quaternary ammonium compound.

Cetylpyridinium chloride (CPC), a quaternary ammonium compound and cationic surfactant, is used in personal hygiene products such as toothpaste, mouthwash, and nasal spray. Although public exposure to CPC is frequent, its pulmonary toxicity has yet to be fully characterized. Due to high risks of CPC inhalation, we aimed to comprehensively elucidate the in vitro and in vivo toxicity of CPC. The results demonstrated that CPC is highly cytotoxic against the A549 cells with a half-maximal inhibitory concentration (IC50) of 5.79μg/mL. Following CPC exposure, via intratracheal instillation (ITI), leakage of lactate dehydrogenase, a biomarker of cell injury, was significantly increased in all exposure groups. The bronchoalveolar lavage fluid (BALF) anal. showed a significant increase in proinflammatory cytokines interleukin (IL)-6, IL-1β, and tumor necrosis factor (TNF)-α levels. ITI of CPC induced focal inflammation of the pulmonary parenchyma in rats lungs. Our study demonstrated that TNF-α was the most commonly secreted proinflammatory cytokine during CPC exposure in both in vitro and in vivo models. Polymorphonuclear leukocytes in the BALF, which are indicators of pulmonary inflammation, significantly increased in a concentration-dependent manner in all in vivo studies including the ITI, acute, and subacute inhalation assays, demonstrating that PMNs are the most sensitive parameters of pulmonary toxicity.

Journal of Applied Toxicology published new progress about Blood urea nitrogen. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Application In Synthesis of 123-03-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Domarco, Olaya; Kieler, Claudia; Pirker, Christine; Dinhof, Carina; Englinger, Bernhard; Reisecker, Johannes M.; Timelthaler, Gerald; Garcia, Marcos D.; Peinador, Carlos; Keppler, Bernhard K.; Berger, Walter; Terenzi, Alessio published the artcile< Subcellular Duplex DNA and G-Quadruplex Interaction Profiling of a Hexagonal PtII Metallacycle>, HPLC of Formula: 3731-53-1, the main research area is platinum metallacycle duplex DNA quadruplex interaction; G-quadruplex; SCC; metallacycle; platinum; subcellular localization.

Metal-driven self-assembly afforded a multitude of fascinating supramol. coordination complexes (SCCs) with applications as catalysts, host-guest, and stimuli-responsive systems. However, the interest in the biol. applications of SCCs is only starting to emerge and thorough characterization of their behavior in biol. milieus is still lacking. Herein, we report on the synthesis and detailed in-cell tracking of a Pt2L2 metallacycle. We show that our hexagonal supramol. accumulates in cancer cell nuclei, exerting a distinctive blue fluorescence staining of chromatin resistant to UV photobleaching selectively in nucleolar G4-rich regions. SCC co-localizes with epitopes of the quadruplex-specific antibody BG4 and replaces other well-known G4 stabilizers. Moreover, the photophys. changes accompanying the metallacycle binding to G4s in solution (fluorescence quenching, absorption enhancement) also take place intracellularly, allowing its subcellular interaction tracking.

Angewandte Chemie, International Edition published new progress about Biocompatibility. 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, HPLC of Formula: 3731-53-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Rocco, Dalila; Novak, Samantha; Prescimone, Alessandro; Constable, Edwin C.; Housecroft, Catherine E. published the artcile< Coordination networks assembled from Co(NCS)2 and 4'-[4-(naphthalen-1-yl)phenyl]-3,2':6',3''-terpyridine: Role of lattice solvents>, Electric Literature of 350-03-8, the main research area is cobalt naphthalenylphenylterpyridine complex preparation thermal stability; crystal structure cobalt naphthalenylphenylterpyridine complex.

The preparation and characterization of 4′-[4-(naphthalen-1-yl)phenyl]-3,2′:6′,3”-terpyridine (1) are described. Reactions of 1 with Co(NCS)2 under conditions of crystal growth by layering using different solvent combinations produced crystals of [Co(1)2(NCS)2]n·2nCHCl3 and [Co(1)2(NCS)2]n·2nC6H5Me, each of which comprised a (4,4) net. The orientations of 1 with respect to the planar network defined by the Co atoms are significantly different in [Co(1)2(NCS)2]n·2nC6H5Me compared to [Co(1)2(NCS)2]n·2nCHCl3, and the toluene mols. in [Co(1)2(NCS)2]n·2nC6H5Me are involved in π-stacking interactions. The solvent-accessible void-space in the latter consists of a series of interlinked cavities in contrast to the open channels in [Co(1)2(NCS)2]n·2nCHCl3. Thermogravimetric anal. was used to investigate solvent loss and uptake in the two coordination networks. After solvent loss from [Co(1)2(NCS)2]n·2nCHCl3, CHCl3, CDCl3 or CH2Cl2 could be taken up by the lattice. In contrast, removal of toluene from [Co(1)2(NCS)2]n·2nC6H5Me was found to be irreversible.

Polyhedron published new progress about Crystal structure. 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

Senapak, W.; Saeeng, R.; Jaratjaroonphong, J.; Kasemsuk, T.; Sirion, U. published the artcile< Green synthesis of dipyrromethanes in aqueous media catalyzed by SO3H-functionalized ionic liquid>, Application of C9H13NO3S, the main research area is dipyrromethane green synthesis aldehyde pyrrole ionic liquid catalyst.

A mild, efficient and metal-free method was described for the green synthesis of dipyrromethanes from aldehydes and unsubstituted pyrrole catalyzed by SO3H-functionalized ionic liquids (SO3H-ILs) in aqueous media at room temperature Notably, SO3H-ILs, 1-butylsulfonic-3-methylimidazolium hydrogen sulfate ([bsmim][HSO4]) was the most efficient catalyst for moderate to good yields of the corresponding desired products.

Organic & Biomolecular Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 21876-43-7 belongs to class pyridine-derivatives, and the molecular formula is C9H13NO3S, Application of C9H13NO3S.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Shi, Wei; Zhang, Ping; Zou, Feng; Zhou, Jiaqi; Yin, Ziyu; Cai, Zilong; Ghaleb, Hesham; Jiang, Yuxuan; Huang, Wenlong; Liu, Yan; Qiu, Qianqian; Qian, Hai published the artcile< Exploration of novel phthalazinone derivatives as potential efflux transporter inhibitors for reversing multidrug resistance and improving the oral absorption of paclitaxel>, Electric Literature of 3731-53-1, the main research area is phthalazinone preparation antitumor efflux transporter inhibitor SAR pharmacokinetic; BCRP; Efflux transporter; Multidrug resistance; Oral bioavailability; P-gp.

A series of phthalazinone ring derivatives, I [R = 4-pyridylmethylamino, 2-phenylethylamino, 4-(2-morpholinoethyl)anilino, etc.] with different aromatic heterocycles substituents on the amide bond were designed and synthesized for dual inhibition of P-gp and BCRP. Most target compoundsI significantly increased the accumulation of P-gp substrates in the chemo-resistant cancer cell lines by inhibiting the efflux of transporters. Compound I [R = 4-(2-morpholinoethyl)anilino] in particular showed stronger MDR reversal compared to Gefitinib and Verapamil, and comparable to that of the BCRP inhibitor Ko143. In addition, compound I [R = 4-(2-morpholinoethyl)anilino] improved intestinal absorption of paclitaxel (PTX) and enhanced the bioavailability of the orally administered drug in vivo.

European Journal of Medicinal Chemistry published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Electric Literature of 3731-53-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem