Category: pyridine-derivatives

On December 15, 1990, Chen, Tien Teh; Fitch, Robert M. published an article.Computed Properties of 52243-87-5 The title of the article was Visible light-induced hydrogen formation from water by various 1,1′-dialkyl-4,4′-bipyridinium salts (viologens). And the article contained the following:

Visible-light-induced H generation from water by 1,1′-dialkyl-4,4′-bipyridinium compounds (viologen dyes) as electron transfer agents was investigated. Among the viologens, pentyl viologen was most efficient. The relative rate of H formation was highest when the redox potential of the viologen was near -0.65 V (vs. SCE) at pH 4.5. There was a relation between the rate of H formation and the hydrophobicity of the viologen dyes because of the heterogeneous nature of the reaction. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Computed Properties of 52243-87-5

The Article related to water photolysis hydrogen formation viologen, solar energy hydrogen formation viologen, Electrochemical, Radiational, and Thermal Energy Technology: Energy Sources and other aspects.Computed Properties of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 20, 2017, Zhu, Yinggui; Zhao, Min; Hu, Xiaojuan; Wang, Xiaofang; Wang, Ling published an article.Safety of Pyridine-3-sulfonic acid The title of the article was Electrogenerated chemiluminescence behavior of Tb complex and its application in sensitive sensing Cd2+. And the article contained the following:

The authors report a novel rare earth metal complex with the weak ligand of aromatic sulfonic acid (pyridine-3-sulfonic acid, 3-pSO3H), and characterized by FTIR, UV-visible, energy-dispersive x-ray spectroscopy (EDX), electrochemiluminescence spectra, etc. Then an excellent electrochemiluminescence (ECL) signal was observed with K2S2O8 as the coreactant in NaAc-HAc buffer solution For another thing, the electrochem. properties of the compound were thoroughly studied in MeCN solution, the possible ECL reaction mechanism is proposed as well. Also, a simple and straightforward ECL platform is reported for sensitive and selective detection of Cd2+ due to the effective quenching after addition of Cd2+. Other heavy/transition metal ions do not interfere with the sensing. The limit of detection is determined as 0.13 nM, the results suggested that as-prepared complex could be a promising material for developing ECL sensors to detect the Cd2+ rapidly indwell in environmental and practical samples. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Safety of Pyridine-3-sulfonic acid

The Article related to electrogenerated chemiluminescence terbium complex sensing cadmium, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Safety of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 1, 2019, Steinlechner, Christoph; Roesel, Arend F.; Oberem, Elisabeth; Paepcke, Ayla; Rockstroh, Nils; Gloaguen, Frederic; Lochbrunner, Stefan; Ludwig, Ralf; Spannenberg, Anke; Junge, Henrik; Francke, Robert; Beller, Matthias published an article.Application of 109660-12-0 The title of the article was Selective Earth-Abundant System for CO2 Reduction: Comparing Photo- and Electrocatalytic Processes. And the article contained the following:

The valorization of CO2 via photo- or electrocatalytic reduction constitutes a promising approach toward the sustainable production of fuels or value-added chems. using intermittent renewable energy sources. For this purpose, mol. catalysts are generally studied independently with respect to the photo- or the electrochem. application, although a unifying approach would be much more effective with respect to the mechanistic understanding and the catalyst optimization. In this context, we present a combined photo- and electrocatalytic study of three Mn diimine catalysts, which demonstrates the synergistic interplay between the two methods. The photochem. part of our study involves the development of a catalytic system containing a heteroleptic Cu photosensitizer and the sacrificial BIH reagent. The system shows exclusive selectivity for CO generation and renders turnover numbers which are among the highest reported thus far within the group of fully earth-abundant photocatalytic systems. The electrochem. part of our investigations complements the mechanistic understanding of the photochem. process and demonstrates that in the present case the sacrificial reagent, the photosensitizer, and the irradiation source can be replaced by the electrode and a weak Bronsted acid. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Application of 109660-12-0

The Article related to carbon dioxide reduction photo electrocatalytic process earth, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Application of 109660-12-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 1995, Liang, Zhaoxi; Wang, Xiaoyun; Yi, He published an article.Electric Literature of 52243-87-5 The title of the article was Electroreduction kinetics of alkyl polyviologens studied by in situ spectroscopy. And the article contained the following:

The electroreduction kinetics of several alkyl polyviologens (I), such as polypropyl viologen, polybutyl viologen, polyhexyl viologen as well as their resp. low mol. analogs (II) and a bisviologen were studied by in situ spectroscopy. The reaction order (α) and rate constant (κ) of the 1st electroreduction were calculated The effect of alkyl chain length (n) is obvious for II, κ values decrease in the order: PrV>BV>HxV. κ Values of I are lower than those of II and depend slightly on n. These facts may be attributed to the diffusion-controlled nature of the electroreduction process. The influences of viologen concentration, the supporting electrolyte and the pH value also were studied. In general, the memory time of I is longer than those of II. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Electric Literature of 52243-87-5

The Article related to electroreduction kinetics alkyl polyviologen spectroscopy, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Electric Literature of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 5, 2004, Kwan, Tricia Ann; Lagreca, Susan Deborah; Lippa, Blaise Scott; Morris, Joel; Wessel, Matthew David published a patent.Formula: C8H10BrN The title of the patent was Preparation of isothiazole derivatives as anticancer agents. And the patent contained the following:

The title compounds I [X = O or S; R1 = (substituted)heterocyclic aromatic ring; R2 = H, (cyclo)alkyl, alkenyl, alkynyl, etc.] were prepared Compounds I are useful as as anticancer agents (no data). Thus, reaction of 3-methanesulfonyl-5-(pyridin-4-ylamino)-isothiazole-4-carboxylic acid amide (preparation given) with (4-chlorophenyl)-methanethiol yielded compound II. The experimental process involved the reaction of 4-Bromo-2-isopropylpyridine(cas: 908267-63-0).Formula: C8H10BrN

The Article related to isothiazole derivative preparation anticancer, Heterocyclic Compounds (More Than One Hetero Atom): Thiazoles, Isothiazoles and other aspects.Formula: C8H10BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kaczmarek, Lukasz published an article in 1985, the title of the article was Bipyridines. Part XVI. Synthesis of novel 1,2,3,7-oxatriazepine and 1,2,3-triazine fused systems by the diazotization of [2,2′-bipyridine]-3,3′-diamine.Computed Properties of 75449-26-2 And the article contains the following content:

In the diazotization reaction of [2,2′-bipyridine]-3,3′-diamine the corresponding tetrazonium salt I was formed. I was transformed, depending upon pH of the post-reaction solution, into 3a,4,5,8a,9,10-hexaaza-3a,8a-dihydropyrene 3a-oxide (II) or 6-oxa-4,5,6a,10,11,11a-hexaaza-6,6a,11a-trihydrocyclohepta[d,e,f]phenanthrene (III). III is isomerized to II in acidic media. Both isomers were transformed in acid into a mixture of (3-nitrosamino-2-pyridyl)-2-pyridin-3-ol and (3-amino-2-pyridyl)-2-pyridin-3-ol. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Computed Properties of 75449-26-2

The Article related to oxahexaazacycloheptaphenanthrene, hexazapyrene oxide, oxatriazepine fused, triazine fused, bipyridinediamine diazotization, Heterocyclic Compounds (More Than One Hetero Atom): Other 7-Membered Rings and other aspects.Computed Properties of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 24, 2019, Yu, Henry; Clark, Michael; Bemis, Guy; Boyd, Michael; Chandupatla, Kishan; Collier, Philip; Deng, Hongbo; Dong, Huijun; Dorsch, Warren; Hoover, Russell R.; Johnson, Mac Arthur, Jr.; Kukarni, Shashank; Penney, Marina; Ronkin, Steven; Takemoto, Darin; Tang, Qing; Waal, Nathan D.; Wang, Tiansheng published a patent.Recommanded Product: 1227002-03-0 The title of the patent was Preparation of substituted oxazepanyl pyrimidinamines as antiproliferation compounds. And the patent contained the following:

The present invention provides compounds I [ring A = Ph, 5-7 membered saturated or partially unsaturated carbocyclic ring, 8-12 membered saturated or partially unsaturated bicyclic heterocyclic ring having 1-2 heteroatoms independently selected from N, O, or S, etc.; each R1 = (independently) H, or (halo)alkyl; or two R1 groups are optionally taken together with their intervening atoms to form 5-8 membered partially unsaturated fused carbocyclic ring; each of R2 = (independently) H, halo, CN, etc.; or two R2 groups are optionally taken together to form :O; or two R2 groups are optionally taken together with their intervening atoms to form 3-8 membered saturated spirocyclic ring having 0-2 heteroatoms independently selected from N, O or S; each R3 = (independently) H, OH, or alkyl; or two R3 groups are optionally taken together to form :O or :CH2; or two R3 groups are optionally taken together with their intervening atoms to form 3-8 membered saturated spirocyclic ring having 0-2 heteroatoms independently selected from N, O or S; or 5-8 membered saturated bridged bicyclic ring having 0-2 heteroatoms independently selected from N, O or S; X = O, S, CH2, etc.; m = 0-2; n = 0-5; p = 0-2] or pharmaceutically acceptable salts thereof, pharmaceutical compositions thereof, and methods of use thereof for treating cellular proliferative disorders (e.g., cancer). E.g., a multi-step synthesis of (R)-II and (S)-II, starting from 3-(tributylstannylmethoxy)propan-1-amine and 2-chloro-5-nitrobenzaldehyde, was described. Exemplified compounds I were evaluated in the Colo 205 reporter assay, HepG2 XBP1 reporter assay, and in the Calcium Flux assay (data given for representative compounds I). The experimental process involved the reaction of Methyl 2-amino-5-chloroisonicotinate(cas: 1227002-03-0).Recommanded Product: 1227002-03-0

The Article related to oxazepanyl pyrimidinamine preparation antiproliferative antitumor, Heterocyclic Compounds (More Than One Hetero Atom): Other 7-Membered Rings and other aspects.Recommanded Product: 1227002-03-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 15, 2013, Duan, Lele; Wang, Lei; Inge, A. Ken; Fischer, Andreas; Zou, Xiaodong; Sun, Licheng published an article.Category: pyridine-derivatives The title of the article was Insights into Ru-Based Molecular Water Oxidation Catalysts: Electronic and Noncovalent-Interaction Effects on Their Catalytic Activities. And the article contained the following:

A series of Ru-bda water oxidation catalysts [Ru(bda)L2] (H2bda = 2,2′-bipyridine-6,6′-dicarboxylic acid; L = [HNEt3][3-SO3-pyridine], 1; 4-(EtOOC)-pyridine, 2; 4-bromopyridine, 3; pyridine, 4; 4-methoxypyridine, 5; 4-(Me2N)-pyridine, 6; 4-[Ph(CH2)3]-pyridine, 7) were synthesized with electron-donating/-withdrawing groups and hydrophilic/hydrophobic groups in the axial ligands. These complexes were characterized by 1H NMR spectroscopy, high-resolution mass spectrometry, elemental anal., and electrochem. In addition, complexes 1 and 6 were further identified by single crystal X-ray crystallog., revealing a highly distorted octahedral configuration of the Ru coordination sphere. All of these complexes are highly active toward CeIV-driven (CeIV = Ce(NH4)2(NO3)6) water oxidation with oxygen evolution rates up to 119 mols of O2 per mol of catalyst per s. Their structure-activity relationship was investigated. Electron-withdrawing and noncovalent interactions (attraction) exhibit pos. effect on the catalytic activity of Ru-bda catalysts. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Category: pyridine-derivatives

The Article related to ruthenium based mol water oxidation catalyst electronic noncovalent interaction, Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms: Reaction Kinetics and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 8, 2014, Yang, Yonggang; Li, Yi; Li, Baozong; Wang, Qingfeng published a patent.Application of 75449-26-2 The title of the patent was Chiral silsesquioxane containing arylene, manufacture method, and application in absorbent, chiral separation, and asymmetric catalysis. And the patent contained the following:

Title chiral silsesquioxane is homopolymer of I (OEt)3Si(CH2)mNHC(O)NHCH(R)C(O)NH-A-NHC(O)CH(R)NHC(O)NH(CH2)mSi(OEt)3; wherein R is residual group of valine, isoleucine, alanine, or phenylalanine, A is aromatic group of diamine, and m is integer of 3-10. Title manufacture method comprises the steps: (1) reacting Boc-protected amino acid with aromatic diamine to give Boc-protected intermediate; (2) deprotecting Boc group; (3) reacting deprotected intermediate with isocyanate (EtO)3Si(CH2)mNCO (m is integer of 3-10) to give monomer; and (4) polycondensing the monomer to obtain chiral silsesquioxane. Title chiral silsesquioxane has stable chem. property, simple production, and convenient use, has good adsorption effect on aryl compound and heavy metal ion, also has great application value in chiral resolution and asym. catalysis. In an example, I (R = iPr, A = biphenylene, m = 3) was manufactured from Boc-L-valine, 4,4′-diaminobiphenyl, and (3-isocyanato)propyltriethoxysilane; I was polymerized to give right-hand helical fiber with diameter 50-100 nm and length 2-10 μm. The obtained silsesquioxane 50 mg was added to nitrobenzene/cyclohexane solution (volume ratio 1:99) 850 μl; after 5 h, nitrobenzene 19.3 % was absorbed by silsesquioxane, which indicated that the silsesquioxane could be used as absorbent to absorb aromatic compound The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Application of 75449-26-2

The Article related to chiral silsesquioxane arylene manufacture absorbent resolution asym catalysis, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Application of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 13, 2015, Liu, Jun; Dou, Chuandong published a patent.Electric Literature of 75449-26-2 The title of the patent was Bis(boron-nitrogen-bridged) bipyridyl and organic/high polymer material prepared with the same. And the patent contained the following:

The present invention relates to a kind of bis(boron-nitrogen-bridged) bipyridyl (I, R1 is 4-20 alkyl group, R2, e.g., Ph, F, Et etc.), and organic/high polymer material prepared with the same, belonging to organic/high polymer area of solar cell. The object of the invention is to take classic pyrene unit as starting point to develop new BN receptor unit for further expanding receptor material system. The bis(boron-nitrogen-bridged) bipyridyl in this invention contains BN unit so that it has a number of advantages: such as complanation structure is conducive to orderly close accumulation of material mol., so as to increase mobility of material carrier; BN coordination has strong electron-drawing action, which is conducive to reducing mol. energy level; introducing alkyl chain with different lengths contributes to regulating material dissoly.; reaction site with functionalization can be used for preparing organic/high polymer material, and it has good application prospect if applied to solar cell. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Electric Literature of 75449-26-2

The Article related to boron nitrogen bridged bipyridyl organic polymer material solar cell, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Electric Literature of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem