Tag: M.W=150-200

The critical parameters of pyridine are pressure 6.70 MPa, temperature 620 K and volume 229 cm3·mol−1. 31181-90-5, formula is C6H4BrNO, Name is 5-Bromopicolinaldehyde. In the temperature range 340–426 °C its vapor pressure p can be described with the Antoine equation.. Application of C6H4BrNO.

Knezevic, Melina;Heilmann, Michael;Piccini, Giovanni Maria;Tiefenbacher, Konrad research published 《 Overriding Intrinsic Reactivity in Aliphatic C-H Oxidation: Preferential C3/C4 Oxidation of Aliphatic Ammonium Substrates》, the research content is summarized as follows. The site-selective C-H oxidation of unactivated positions in aliphatic ammonium chains poses a tremendous synthetic challenge, for which a solution has not yet been found. Here, we report the preferential oxidation of the strongly deactivated C3/C4 positions of aliphatic ammonium substrates by employing a novel supramol. catalyst. This chimeric catalyst was synthesized by linking the well-explored catalytic moiety Fe(pdp) to an alkyl ammonium binding mol. tweezer. The results highlight the vast potential of overriding the intrinsic reactivity in chem. reactions by guiding catalysis using supramol. host structures that enable a precise orientation of the substrates.

31181-90-5, 5-Bromopyridine-2-carbaldehyde is a useful research compound. Its molecular formula is C6H4BrNO and its molecular weight is 186.01 g/mol. The purity is usually 95%.

5-Bromopyridine-2-carbaldehyde is a water soluble organic molecule that has been shown to inhibit the mitochondrial respiratory chain. It is a structural analog of the natural substrate for mitochondrial cytochrome c oxidase, 5-aminolevulinic acid. This compound has been shown to be selective against cancer cells and has anti-viral properties. The photophysical properties of 5-bromopyridine-2-carbaldehyde have been studied extensively. The fluorescence quantum yield of this molecule in aqueous solution is 0.06%., Application of C6H4BrNO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridine is colorless, but older or impure samples can appear yellow. 5315-25-3, formula is C6H6BrN, Name is 2-Bromo-6-methylpyridine. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Historically, pyridine was produced from coal tar. COA of Formula: C6H6BrN.

Koller, Sebastian;Klein, Philippe;Reinhardt, Katja;Ochmann, Lukas;Seitz, Antonia;Jandl, Christian;Pothig, Alexander;Hintermann, Lukas research published 《 New Access Routes to Privileged and Chiral Ligands for Transition-Metal Catalyzed Hydrogen Autotransfer (Borrowing Hydrogen), Dehydrogenative Condensation, and Alkene Isomerization Reactions》, the research content is summarized as follows. A group of transition-metal catalyzed hydrogen moving reactions, encompassing hydrogen autotransfer (HAT; also called borrowing hydrogen, BH), dehydrogenative condensation (DHC) and alkene isomerization, displays high atom economy and relies on widely available starting materials. Such reactions have considerable potential for clean reaction design and application in sustainable synthesis. With the aim to develop and study synthetic applications of the title reactions, authors have set up synthetic access routes to a toolbox of structurally varied ligands for and pincer complexes of some transition metals (cobalt, ruthenium, iridium) that are well established for the title reactions. Ligand target structures, for which often improved syntheses have been found, encompass 6,6′-dihydroxy-2,2′-bipyridine, 2(3-hydroxyphenyl)pyridines (as backbones for PCN pincers), 2(6-methylpyridine-2-yl)pyridines (as backbones for PNN pincers) and 2(3-tolyl)pyridines (as backbones for PCN pincers). To support research towards asym. versions of the title reactions, they have prepared asym. modified versions of well-established catalysts, including chiral, enantiopure versions of Milstein’s PNN-ruthenium pincer, Kempe’s triazinyl-diaminophosphanyl PNP-iridium- or -cobalt pincers, Huang’s PCN-iridium pincers, and Grotjahn’s alkene zipper complex. The strategy applied to ‘chiral switching’ relied on replacing sym. dialkylphosphine donor-groups by dimenthylphosphine or aryl(menthyl)phosphine donor units. The resulting ligands or complexes have been structurally characterized, and the catalytic potential of the catalysts has been established in exploratory model reactions (transfer hydrogenation; diol to lactone dehydrogenative condensation; alkene isomerization). Several model reactions have been designed which will allow to study asym. catalytic hydrogen moving reactions.

5315-25-3, 2-Bromo-6-methylpyridine (2BMPy) is a bromopyridine derivative. It is formed when 2-chloro-6-methylpyridine is heated with bromotrimethylsilane. Its synthesis from various methods have been reported.
2-Bromo-6-methylpyridine is a building block in the preparation of nitrogen containing heterocyclic compounds.
2-Bromo-6-methylpyridine is an organic compound that belongs to the group of pyridinium halides. It is soluble in common solvents such as water, ethanol, and acetone. 2BMPy has been shown to act as a glutamate receptor antagonist and has been used in the study of glutamate receptors, including their subtypes. This chemical has also been shown to have antioxidant properties and can be used in the prevention of atherosclerosis., COA of Formula: C6H6BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. 5315-25-3, formula is C6H6BrN, Name is 2-Bromo-6-methylpyridine. For this reason, 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). Category: pyridine-derivatives.

Kong, Degong;Hu, Bowen;Yang, Min;Chen, Dafa;Xia, Haiping research published 《 Highly Regio- and Stereoselective Tridentate N^CNN Cobalt-Catalyzed 1,3-Diyne Hydrosilylation》, the research content is summarized as follows. A highly regio- and stereoselective tridentate N^CNN Co-catalyzed hydrosilylation of 1,3-diynes was developed. A wide range of 1,3-diynes was suitable for such transformations at room temperature, affording the corresponding silyl-functionalized 1,3-enynes in good yields within 5 min. These reactions can be readily scaled up to gram scale under mild conditions. To date, this is the most efficient Co catalytic system for the hydrosilylation of 1,3-diynes.

Category: pyridine-derivatives, 2-Bromo-6-methylpyridine (2BMPy) is a bromopyridine derivative. It is formed when 2-chloro-6-methylpyridine is heated with bromotrimethylsilane. Its synthesis from various methods have been reported.
2-Bromo-6-methylpyridine is a building block in the preparation of nitrogen containing heterocyclic compounds.
2-Bromo-6-methylpyridine is an organic compound that belongs to the group of pyridinium halides. It is soluble in common solvents such as water, ethanol, and acetone. 2BMPy has been shown to act as a glutamate receptor antagonist and has been used in the study of glutamate receptors, including their subtypes. This chemical has also been shown to have antioxidant properties and can be used in the prevention of atherosclerosis., 5315-25-3.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 766-11-0, formula is C5H3BrFN, Name is 5-Bromo-2-fluoropyridine. TThe standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Name: 5-Bromo-2-fluoropyridine.

Kosobokov, Mikhail;Cui, Benqiang;Balia, Andrii;Matsuzaki, Kohei;Tokunaga, Etsuko;Saito, Norimichi;Shibata, Norio research published 《 Importance of a Fluorine Substituent for the Preparation of meta- and para-Pentafluoro-λ⁶-sulfanyl-Substituted Pyridines》, the research content is summarized as follows. 3- And 4-(Pentafluorosulfanyl)pyridines are prepared by oxidative chlorotetrafluorination of the corresponding disulfides to give pyridylsulfur chlorotetrafluorides (SF₄Cl-pyridines), followed by chloride/fluoride exchange with fluorides; the presence of at least one fluoro substituent on the pyridine rings is necessary for the oxidative chlorotetrafluorination of the pyridinyl disulfides. A variety of 3- and 4-pentafluorosulfanyl pyridines were prepared; pentafluorosulfanylpyridines with 2- or 6-fluoro substituents underwent nucleophilic substitution reactions with benzyl alc., benzylamine, benzylthiol, ammonia, sodium azide, and trimethylsilyl cyanide to yield 3- or 4-pentafluorosulfanyl pyridines with cyano, amino, alkoxy, or azido substituents. This method provides access to a variety of previously unavailable SF₅-substituted pyridine building blocks.

766-11-0, 5-Bromo-2-fluoropyridine is a useful research compound. Its molecular formula is C5H3BrFN and its molecular weight is 175.99 g/mol. The purity is usually 95%.
5-Bromo-2-fluoropyridine is a boronic acid that has been shown to react with iodides and form 5-bromo-2-fluoroiodobenzene. The reaction of 5-bromo-2-fluoropyridine with benzene gives the same product as the reaction with 1,3,5-trioxane. The UV absorption of 5-bromo-2-fluoropyridine is found at 230 nm and 260 nm. It also has an absorption band in the infrared region at 1625 cm−1. Vibrational progressions have been observed for this molecule, which are due to dipole moments and electron density distributions in the molecule.
5-bromo-2-fluoropyridine is used in the synthesis of heteroaromatic and aniline derivatives of piperidines as potent ligands used for vesicular acetylcholine transport. , Name: 5-Bromo-2-fluoropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. 16133-25-8, formula is C5H4ClNO2S, Name is Pyridine-3-sulfonyl chloride. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell. Electric Literature of 16133-25-8.

Kraupner, Nicolas;Dinh, Chau Phi;Wen, Xiaoan;Landry, Valerie;Herledan, Adrien;Leroux, Florence;Bosc, Damien;Charton, Julie;Maillard, Clara;Warenghem, Sandrine;Duplan, Isabelle;Piveteau, Catherine;Hennuyer, Nathalie;Staels, Bart;Deprez, Benoit;Deprez-Poulain, Rebecca research published 《 Identification of indole-based activators of insulin degrading enzyme》, the research content is summarized as follows. Insulin degrading enzyme (IDE) is a zinc metalloprotease that cleaves numerous substrates among which amyloid-β and insulin. It has been linked through genetic studies to the risk of type-2 diabetes (T2D) or Alzheimer’s disease (AD). Pharmacol. activation of IDE is an attractive therapeutic strategy in AD. While IDE inhibition gave paradoxical activity in glucose homeostasis, recent studies, in particular in the liver suggest that IDE activators could be also of interest in diabetes. Here we describe the discovery of an original series of IDE activators by screening and structure-activity relationships. Early cellular studies show that hit I decreases glucose-stimulating insulin secretion. Docking studies revealed it has an unprecedented extended binding to the polyanion-binding site of IDE. These indole-based pharmacol. tools are activators of both Aβ and insulin hydrolysis by IDE and could be helpful to explore the multiple roles of IDE.

16133-25-8, Pyridine-3-sulfonyl chloride is a useful research compound. Its molecular formula is C5H4ClNO2S and its molecular weight is 177.61 g/mol. The purity is usually 95%.
Pyridine-3-sulfonyl chloride is a reagent used in the synthesis of pyrimidine derivatives with anti-proliferative activity against negative breast cancer cells.
Pyridine-3-sulfonyl chloride is a chemical compound that binds to the active site of cytochrome P450 enzymes. It can be used to study the effects of matrix effect on reaction solution. Pyridine-3-sulfonyl chloride has been shown to have an UV absorption spectrum with a maximum at 280 nm and a p450 activity that is proportional to the concentration of human serum. This compound has been shown to inhibit kinase domain in vitro assays, which may have clinical relevance in the treatment of obesity., Electric Literature of 16133-25-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. 31181-90-5, formula is C6H4BrNO, Name is 5-Bromopicolinaldehyde. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell. Safety of 5-Bromopicolinaldehyde.

Kuimov, Anatoly D.;Becker, Christina S.;Koskin, Igor P.;Zhaguparov, Daniiar E.;Sonina, Alina A.;Shundrina, Inna K.;Sherin, Peter S.;Kazantsev, Maxim S. research published 《 2-((9H-fluoren-9-ylidene)methyl)pyridine as a new functional block for aggregation induced emissive and stimuli-responsive materials》, the research content is summarized as follows. Highly-emissive mechanofluorochromic (MFC) organic solids changing their emission colors upon exposure to mech. stimuli are highly demanded for various practical applications. In this work we introduced a planarizable by intramol. N···H bond 2-((9H-fluoren-9-ylidene)methyl)pyridine fragment featuring an Aggregation-Induced Emission Enhancement and, particularly, MFC property for its bithiophene derivative A two compounds, 2-((9H-fluoren-9-ylidene)methyl)-5-(5-phenylthiophen-2-yl)pyridine (FTP) and 2-((9H-fluoren-9-ylidene)methyl)-5-([2,2′-bithiophen]-5-yl)pyridine (FTT) were synthesized and fully characterized. In liquid solution both compounds are low emissive, however in the solid state they exhibit the photoluminescence quantum yield of 33% and 13% for FTP and FTT, resp. Remarkably, the powder of FTT demonstrates a self-reversible mechanofluorochromism: the emission spectrum red-shifts after the grinding or pressurization and it recovers during one-day of storage without any treatment. The powder X-ray diffraction and differential scanning calorimetry revealed the reversible phase transition under temperature and mechanic stimuli. Anal. of mol. structure shows that in the gas phase FTT has a planar geometry while in the solid state it loses the flatness due to the crystal environment. Our results speak in favor of the increase of FTT planarity under the pressure to be responsible for the observed mechanofluorochromism.

Safety of 5-Bromopicolinaldehyde, 5-Bromopyridine-2-carbaldehyde is a useful research compound. Its molecular formula is C6H4BrNO and its molecular weight is 186.01 g/mol. The purity is usually 95%.

5-Bromopyridine-2-carbaldehyde is a water soluble organic molecule that has been shown to inhibit the mitochondrial respiratory chain. It is a structural analog of the natural substrate for mitochondrial cytochrome c oxidase, 5-aminolevulinic acid. This compound has been shown to be selective against cancer cells and has anti-viral properties. The photophysical properties of 5-bromopyridine-2-carbaldehyde have been studied extensively. The fluorescence quantum yield of this molecule in aqueous solution is 0.06%., 31181-90-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. 5315-25-3, formula is C6H6BrN, Name is 2-Bromo-6-methylpyridine. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell. Reference of 5315-25-3.

Kuleshova, Olena;Asako, Sobi;Ilies, Laurean research published 《 Ligand-Enabled, Iridium-Catalyzed ortho-Borylation of Fluoroarenes》, the research content is summarized as follows. A terpyridine derivative and an iridium complex catalyze the C-H borylation of a stoichiometric amount of a fluoroarene with high ortho-selectivity and tolerance of functional groups such as bromide, chloride, ester, ketone, amine, and in situ-borylated hydroxyl. Complex drug mols. such as haloperidol can be selectively borylated ortho to the F atom. The terpyridine ligand undergoes rollover cyclometalation to produce an N,N,C-coordinated iridium complex, which may either selectively borylate the fluoroarene by itself or undergo reductive elimination to produce a borylated ligand.

5315-25-3, 2-Bromo-6-methylpyridine (2BMPy) is a bromopyridine derivative. It is formed when 2-chloro-6-methylpyridine is heated with bromotrimethylsilane. Its synthesis from various methods have been reported.
2-Bromo-6-methylpyridine is a building block in the preparation of nitrogen containing heterocyclic compounds.
2-Bromo-6-methylpyridine is an organic compound that belongs to the group of pyridinium halides. It is soluble in common solvents such as water, ethanol, and acetone. 2BMPy has been shown to act as a glutamate receptor antagonist and has been used in the study of glutamate receptors, including their subtypes. This chemical has also been shown to have antioxidant properties and can be used in the prevention of atherosclerosis., Reference of 5315-25-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom. 5315-25-3, formula is C6H6BrN, Name is 2-Bromo-6-methylpyridine. It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell. COA of Formula: C6H6BrN.

Kumar, Gadde Sathish;Peshkov, Anatoly;Brzozowska, Aleksandra;Nikolaienko, Pavlo;Zhu, Chen;Rueping, Magnus research published 《 Nickel-Catalyzed Chain-Walking Cross-Electrophile Coupling of Alkyl and Aryl Halides and Olefin Hydroarylation Enabled by Electrochemical Reduction》, the research content is summarized as follows. The first electrochem. approach for nickel-catalyzed cross-electrophile coupling was developed. This method provides a novel route to 1,1-diarylalkane derivatives from simple and readily available alkyl and aryl halides in good yields and excellent regioselectivity under mild conditions. The procedure shows good tolerance for a broad variety of functional groups and both primary and secondary alkyl halides can be used. Furthermore, the reaction was successfully scaled up to the multigram scale, thus indicating potential for industrial application. Mechanistic study suggested the formation of a nickel hydride in the electroreductive chain-walking arylation, which led to the development of a new nickel-catalyzed hydroarylation of styrenes to provide a series of 1,1-diaryl alkanes in good yields under mild reaction conditions.

COA of Formula: C6H6BrN, 2-Bromo-6-methylpyridine (2BMPy) is a bromopyridine derivative. It is formed when 2-chloro-6-methylpyridine is heated with bromotrimethylsilane. Its synthesis from various methods have been reported.
2-Bromo-6-methylpyridine is a building block in the preparation of nitrogen containing heterocyclic compounds.
2-Bromo-6-methylpyridine is an organic compound that belongs to the group of pyridinium halides. It is soluble in common solvents such as water, ethanol, and acetone. 2BMPy has been shown to act as a glutamate receptor antagonist and has been used in the study of glutamate receptors, including their subtypes. This chemical has also been shown to have antioxidant properties and can be used in the prevention of atherosclerosis., 5315-25-3.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Chen, Xiaoxia; Cai, Wenjuan; Liu, Gang; Tu, Yayi; Fan, Congbin; Pu, Shouzhi published the artcile< A highly selective colorimetric and fluorescent probe Eu(tdl)2abp for H2S sensing: Application in live cell imaging and natural water>, Category: pyridine-derivatives, the main research area is Eu(tdl)(2)abp; H(2)S; Large stokes shift; Living cells; Natural water.

Using 4-([2,2′: 6′, 2′- terpyridin] -4′-yl) -N, N-dimethylaniline (tdl) as auxiliary ligand and 6-azido-2,2′-bipyridine (abp) as recognition ligand, a europium complex fluorescent probe Eu(4-([2,2′: 6′, 2′-terpyridin] -4′ -yl) -N, N-dimethylaniline)2-6-azido-2,2′-bipyridine Eu(tdl)2abp for efficient and specific recognition of hydrogen sulfide (H2S) was successfully synthesized and characterized by NMR and MS. Eu(tdl)2abp represented “”on-off”” fluorescence signals for H2S and its color changes could be identified with naked eyes. Eu(tdl)2abp had short response time (2 min) to H2S, high selectivity and good anti-interference, large stokes shift (207 nm). In various samples, when H2S existed, the azide group was reduced to amine group, resulting in closed fluorescence signal, and the fluorescence intensity reached the degree of quenching without being affected by other interference. At the same time, there was a good linear relationship between relative fluorescence intensity and H2S concentration with the detection limit (LOD) of 0.64 μM. The sensing mechanism of Eu(tdl)2abp to detect H2S was characterized by 1H NMR and HR-MS. Eu(tdl)2abp was used with success for the sensitive detection of H2S in natural water and living cells.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about 366-18-7. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ma, Zhuang; Lu, Helin; Liao, Ke; Chen, Zhilong published the artcile< Tungstate-Catalyzed Biomimetic Oxidative Halogenation of (Hetero)Arene under Mild Condition>, Recommanded Product: 3-Bromo-1H-pyrrolo[3,2-c]pyridine, the main research area is arene metal halide tungstate catalyst regioselective chemoselective oxidative halogenation; haloarene preparation green chem; Green Chemistry; Organic Chemistry; Pharmaceutical Engineering.

A biomimetic approach for halogenation (Br, Cl, I) of (hetero)arene catalyzed by tungstate under mild pH in a cost-efficient and environment- and operation-friendly manner was reported. Broad substrates diverse functional group tolerance and good chemo- and regioselectivities were observed, even in late-stage halogenation of complex mols. Moreover, this approach was scaled up to over 100 g without time-consuming and costly column purification Several drugs and key precursors for drugs bearing aryl halides (Br, Cl, I) was conveniently prepared based on this approach.

iScience published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 23612-36-4 belongs to class pyridine-derivatives, and the molecular formula is C7H5BrN2, Recommanded Product: 3-Bromo-1H-pyrrolo[3,2-c]pyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem