Tag: 100-200

On January 15, 1980, Freyne, Eddy J.; Esmans, Eddy L.; Lepoivre, Josef A.; Alderweireldt, Frank C. published an article.Name: 5-Isopropylnicotinic acid The title of the article was Stereospecific synthesis of a novel series of pyridine nucleosides. And the article contained the following:

Condensation of 3,5-di-O-benzoyl-β-D-ribofuranosyl chloride severally with 3-acetyl-5-alkylpyridines, 5-alkyl-3-methoxycarbonylpyridines (alkyl = Me, Et, Pr, and Me2CH), 5-isopropylnicotinamide, and 3,5-diacetylpyridine bis(ethylene acetal) in MeCN at -5° gave the corresponding 1-(3,5-di-O-benzoyl-β-D-ribofuranosyl)-3,5-disubstituted pyridinium chlorides in excellent yield (90%). From the reaction of a series of 2,3-O-isopropylidene-β-D-ribofuranosyl halides with 3-acetyl-5-methylpyridine at room temperature, the α-nucleosides were obtained. The experimental process involved the reaction of 5-Isopropylnicotinic acid(cas: 73591-69-2).Name: 5-Isopropylnicotinic acid

The Article related to pyridine nucleoside, stereospecific ribosylation pyridine, Carbohydrates: Nucleosides, Nucleotides and other aspects.Name: 5-Isopropylnicotinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lopez-Fontal, Elkin; Grochmal, Anna; Foran, Tom; Milanesi, Lilia; Tomas, Salvador published an article in 2018, the title of the article was Ship in a bottle: confinement-promoted self-assembly.Application In Synthesis of Pyridine-3-sulfonic acid And the article contains the following content:

Understanding self-assembly in confined spaces is essential to fully understand mol. processes in confined cell compartments and will offer clues on the behavior of simple confined systems, such as protocells and lipid-vesicle based devices. Using a model system composed of lipid vesicles, a membrane impermeable receptor and a membrane-permeable ligand, we have studied in detail how compartmentalization modulates the interaction between the confined receptor and its ligand. We demonstrate that confinement of one of the building blocks stabilizes complex self-assembled structures to the extent that dilution leads, counterintuitively, to the formation of long range assemblies. The behavior of the system can be explained by considering a confinement factor that is analogus, although not identical, to the effective molarity for intramol. binding events. The confinement effect renders complex self-assembled species robust and persistent under conditions where they do not form in bulk solution Moreover, we show that the formation of stable complex assemblies in systems compartmentalized by semi-permeable membranes does not require the prior confinement of all components, but only that of key membrane impermeable building blocks. To use a macroscopic analogy, lipid vesicles are like ship-in-a bottle constructs that are capable of directing the assembly of the confined ship following the confinement of a few key wooden planks. Therefore, we believe that the confinement effect described here would have played an important role in shaping the increase of chem. complexity within protocells during the first stages of abiogenesis. Addnl., we argue that this effect can be exploited to design increasingly efficient functional devices based on comparatively simple vesicles for applications in biosensing, nanoreactors and drug delivery vehicles. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Application In Synthesis of Pyridine-3-sulfonic acid

The Article related to self assembly polymerization nucleation scattering, Surface Chemistry and Colloids: Other and other aspects.Application In Synthesis of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 31, 2003, Frosini, Maria; Sesti, Casilde; Dragoni, Stefania; Valoti, Massimo; Palmi, Mitri; Dixon, Henry B. F.; Machetti, Fabrizio; Sgaragli, Giampietro published an article.SDS of cas: 636-73-7 The title of the article was Interactions of taurine and structurally related analogues with the GABAergic system and taurine binding sites of rabbit brain. And the article contained the following:

The aim of this study was to find taurinergic compounds that do not interact with brain GABAergic systems. Washed synaptic membranes (SM) from whole rabbit brain were able to bind [3H]muscimol. Saturation experiments of the binding of [3H]GABA to GABAB receptors showed that SM possess two binding components; twice Triton X-100-treated SM contained 0.048 mmol endogenous taurine/kg protein and bound [3H]taurine in a saturable manner (Kd = 249.0 nM and Bmax = 3.4 pmol mg-1 prot). Among the 19 structural analogs of taurine, 6-aminomethyl-3-methyl-4H-1,2,4-benzothiadiazine 1,1-dioxide (TAG), 2-aminoethylarsonic (AEA), 2-hydroxyethanesulfonic (ISE) and (±)cis-2-aminocyclohexane sulfonic acids (CAHS) displaced [3H]taurine binding (Ki = 0.13, 0.13, 13.5 and 4.0 μM, resp.). These analogs did not interact with GABAA and GABAB receptors and did not affect taurine- and GABA-uptake systems and GABA-transaminase activity. 3-Aminopropanesulfonic acid (OMO), β-alanine, pyridine-3-sulfonic acid, N,N,N-trimethyltaurine (TMT), 2-(guanidino)ethanesulfonic acid (GES), ethanolamine-O-sulfate, N,N-dimethyltaurine (DMT), taurine and (±)piperidine-3-sulfonic acid (PSA) inhibited [3H]muscimol binding to GABAA receptors with different affinities (Ki = 0.013, 7.9, 24.6, 47.5, 52.0, 91.0, 47.5, 118.1 and 166.3 μM, resp.). Taurine, 2-aminoethylphosphonic acid, DMT, TMT and OMO inhibited the binding of [3H]GABA to GABAB receptors with Ki’s in the μM range (0.8, 3.5, 4.4, 11.3 and 5.0, resp.). GES inhibited taurine uptake (IC50 = 3.72 μM) and PSA GABA transaminase activity (IC50 = 103.0 μM). In conclusion, AEA, TAG, ISE and CAHS fulfill the criteria for taurinergic agents. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).SDS of cas: 636-73-7

The Article related to taurine analog gabaergic system receptor brain, Mammalian Hormones: Neurotransmitters and other aspects.SDS of cas: 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Xing, Kai; Fan, Rui-Qing; Liu, Xiao-Yuan; Gai, Shuang; Chen, Wei; Yang, Yu-Lin; Li, Jing published an article in 2020, the title of the article was A self-calibrating dual responsive platform for the sensitive detection of sulfite and sulfonic derivatives based on a robust Hf(IV) metal-organic framework.Name: Pyridine-3-sulfonic acid And the article contains the following content:

A robust hafnium-based metal organic framework, Hf-PBTA, with sensitive and self-calibrating dual-emissive fluorescence response towards sulfite and sulfonic derivatives, including antibiotic sulfamethazine, has been developed, which shows fast detection of sulfite ions at a concentration as low as 76 ppb. The opposite response tendency from two radiative pathways towards aromatic sulfonic mols. and sulfite anions stems from the synergistic effect of the pyridine protonation effect, π-π stacking interaction and intramol. twist motion. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Name: Pyridine-3-sulfonic acid

The Article related to fluorescent sensor sulfite sulfonic derivative metal organic framework, Organic Analytical Chemistry: Determinations and other aspects.Name: Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 13, 2012, Zhao, Hong-Wu; Li, Hai-Long; Yue, Yuan-Yuan; Qin, Xiao; Sheng, Zhi-Hui; Cui, Jin; Su, Shi; Song, Xiu-Qing; Yan, Hong; Zhong, Ru-Gang published an article.Safety of [2,2′-Bipyridine]-3,3′-diamine The title of the article was Design, synthesis and use of novel 3,3′-disubstituted 2,2′-bipyridine-based chiral ligands: asymmetric catalysis in direct aldol reactions. And the article contained the following:

A wide range of chiral ligands based on the 2,2′-bipyridine scaffold were designed and synthesized. In complexation with metal Lewis acids, the reactivity and stereoselectivity of the prepared chiral ligands were examined in asym. catalytic direct aldol reactions, thus providing the desired products with high stereoselectivities. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Safety of [2,2′-Bipyridine]-3,3′-diamine

The Article related to bipyridine chiral ligand preparation asym aldol catalyst, General Organic Chemistry: Synthetic Methods and other aspects.Safety of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 15, 2021, Wang, Qiang; Wang, Yujia; Chen, Lin; Sun, Xuzhuo; Li, Bo; He, Shuanglin; Li, Jun; Wang, Ning published an article.Formula: C5H5NO3S The title of the article was Introducing electrostatic interaction into Ru(bda) complexes for promoting water-oxidation catalysis. And the article contained the following:

Ru(bda) (H2bda = 2,2′-bipyridine-6,6′-dicarboxylic acid) complex is a kind of well-known water oxidation catalyst, which goes through the bimol. I2M mechanism with an inter-catalyst O-O coupling step. Recently, we developed two facile strategies to accelerate O-O coupling via introducing the electrostatic interaction into Ru(bda)-catalyzed systems. In this work, a series of Ru(bda) complexes with different charged groups on different positions were synthesized to demonstrate the general applicability of these design strategies. It found these catalytic systems with attractive electrostatic interaction display much better activity, and the position of the charged substituents also has a significant influence on the catalytic activity. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Formula: C5H5NO3S

The Article related to ruthenium bipyridine complex electrostatic interaction water oxidation, Placeholder for records without volume info and other aspects.Formula: C5H5NO3S

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 2019, Steinlechner, Christoph; Spannenberg, Anke; Junge, Henrik; Beller, Matthias published an article.Related Products of 109660-12-0 The title of the article was Tetracarbonyl[4,4-dimethyl-2-(pyridin-2-yl)-2-oxazoline-κ2N,N′]molybdenum(0). And the article contained the following:

In the title compound, [Mo(C10H12N2O)(CO)4], the molybdenum(0) center is surrounded by a bidentate diimine [4,4-dimethyl-2-(pyridin-2-yl)-2-oxazoline] and four carbonyl ligands in a distorted octahedral coordination geometry. The diimine ligand coordinates via the two nitrogen atoms. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Related Products of 109660-12-0

The Article related to tetracarbonyl dimethyl pyridinyl oxazoline molybdenum crystallization, Placeholder for records without volume info and other aspects.Related Products of 109660-12-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 2020, Jin, Lei; Yang, Jia-Qiang; Yang, Fang-Zu; Wu, De-Yin; Tian, Zhong-Qun published an article.Application In Synthesis of Pyridine-3-sulfonic acid The title of the article was Electrochemistry and coordination behaviors of hypoxanthine-Au (III) ion in the cyanide-free gold electrodeposition. And the article contained the following:

Alkaloid hypoxanthine is a novel complexant for green cyanide-free Au(III) electrodeposition. The electrochem. and coordination behaviors of hypoxanthine-Au(III) ion in the green cyanide-free bath were studied. The electrochem. behavior confirms that hypoxanthine-Au(III) ion is in the irreversible two-step electro-reductions with the 1st controlled by diffusion and the 2nd by diffusion and electrochem. The stability constant of hypoxanthine-Au(III) ion is 4.8 × 1030. DFT calculations further indicate that the optimal coordination structure is N3-Au-N7 with the N-Au average bond energy of 11.03 eV. The bath component of K citrate plays almost no influence, whereas the additive of sulfocompounds shows a significant effect on the electro-reduction of hypoxanthine-Au(III) ion. Based on the cyanide-free Au(III) electrodeposition bath, the obtained Au coating is fine and compact in grains without organic inclusion and in the resistivity of 2.84 × 10-8 Ω m. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Application In Synthesis of Pyridine-3-sulfonic acid

The Article related to electrochem coordination hypoxanthine gold electrodeposition, Placeholder for records without volume info and other aspects.Application In Synthesis of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 31, 2014, Zhao, Chongjian; Li, Chuwen; Shen, Moyuan; Huang, Lanfen; Li, Qianhong; Hu, Mingyuan; Deng, Hong published an article.Electric Literature of 636-73-7 The title of the article was Syntheses, structures and photoluminescence of Cd(II) coordination polymers based on in situ synthesized bifunctional ligands. And the article contained the following:

By employing Cd(II) salt, NaN3, and CN-(CH2)n-NC (n = 1, 2) and with the absence or presence of secondary ligands, four new cadmium coordination frameworks, named, {[Cd4(btm)4(H2O)2]·3H2O}n (1); [Cd2(btm)2(H2O)]n (2); [Cd2(bte)(PMA)0.5(H2O)]n (3); and [Cd(tzp)(2,2′-bipy)]n (4) (H2btm = bis(tetrazole) methane: H2bte = 1,2-bis(tetrazole-5-yl)ethane; H2tzp = 1H-tetrazolate-5-propionic acid; bipy = bipyridine; PMA = 1,2,4,5-benzenetetracarboxylic acid) were synthesized via in situ hydrothermal reaction. Single crystal x-ray diffraction reveals that compounds 1-3 are all three-dimensional (3D) frameworks. Compound 1 is constructed by Cd1- and Cd3-btm2- layers and large bridging metalloligands. Compound 2 exhibits a 3D framework with two-dimensional (2D) Cd-btm2- (adopting μ6:κN1, N1′: κN2: κN3: κN4: κN3′: κN4’coordination mode) layers pillared by μ3:κN1, N1′: κN2: κN4′ btm2-. Compound 3 is built up by the Cd-bte2- layers and the linker PMA, with left- and right-handed helical chains arranged alternately. It is notable that btm2- takes on six different coordination modes in 1 and 2. Compound 4 represents a 2D layered framework, which can be simplified into a Shubnikov plane net (4.82̂) topol. network with 3-connected T shape linker tzp2- ligands. In addition, the research results show that compounds 1-4 exhibit different fluorescent behaviors and thermal stabilities. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Electric Literature of 636-73-7

The Article related to luminescence cadmium tetrazole coordination polymer, crystal structure cadmium tetrazole coordination polymer preparation, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Electric Literature of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 31, 2002, Rice, Craig R.; Onions, Stuart; Vidal, Natalia; Wallis, John D.; Senna, Maria-Cristina; Pilkington, Melanie; Stoeckli-Evans, Helen published an article.Recommanded Product: [2,2′-Bipyridine]-3,3′-diamine The title of the article was The coordination chemistry of 3,3′-diamino-2,2′-bipyridine and its dication: Exploring the role of the amino groups by X-ray crystallography. And the article contained the following:

The synthesis and structural chem. of new divalent transition metal complexes of the bis-bidentate ligand 3,3′-diamino-2,2′-bipyridine (L1) and its dication L1H2 are described. Ligand L1 reacts with salts of divalent transition metals (Cu(II), Mn(II) and Zn) to afford the (1:1) metal-ligand complexes (2a-2d) as well as the tris complexes (3a-3f). All complexes were fully characterized by spectroscopic methods and the following compounds [Cu(L1)Cl2]2 (2a), [Cu(L1)(OAc)2] (2b), [Zn(L1)3][OTf]2 (3a), and [Zn(L1)3][ZnCl4] (3e and 3f) were structurally characterized. Results from single crystal x-ray diffraction measurements indicate that formation of an intramol. H bond between the two amino groups allows the ligand to coordinate divalent metal ions through their diimine binding sites. Also, the structure of compound 2a reveals that it crystallizes as a dimer in which each Cu ion is bound to two pyridine N atoms and two chloride ions in a distorted square planar arrangement, with a long axial contact from a neighboring amino group completing the approx. square-pyramidal geometry at CuII. Complexation of this ligand in acidic conditions afforded [Cu(L1H2)Cl4] (4), as well as the two salts [L1H2][CuCl4] (5a) and [L1H2][ZnCl4] (5b). All three compounds were structurally characterized and the dication (L1H2) displays a different coordination preference for the chelation of metal ions. In all three cases, both of the heterocyclic N atoms of the ligand are protonated, thus preventing chelation to the metal ion, although for compound 4 crystallog. studies reveal that the two amino functionalities coordinate the Cu(II) ion. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Recommanded Product: [2,2′-Bipyridine]-3,3′-diamine

The Article related to transition metal aminobipyridine preparation structure, crystal structure transition metal aminobipyridine, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Recommanded Product: [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem