Day: November 3, 2022

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

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 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

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 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 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 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 October 31, 1994, Satoh, Hideharu; Ohno, Hiroyuki; Tokuda, Koichi; Ohsaka, Takeo published an article.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide The title of the article was A study on diffusional behavior of propyl viologen in poly(ethylene oxide) polymer solvents based on a combined use of steady-state cyclic voltammetry and potential-step chronoamperometry. And the article contained the following:

The diffusion coefficient (DPV2+) and the concentration (CaPV2+) of the actually electroactive PV2+ in the poly(ethylene oxide) (PEO, average mol. weight: 400) media containing 0.1M LiClO4 and various concentrations of propylviologen dibromide (PVBr2) could be sep. estimated without previous knowledge of either, based on a combined use of steady-state cyclic voltammetry at carbon fiber electrodes (diameter: 9 μm) and potential-step chronoamperometry at glassy carbon electrodes (diameter: 1 mm) as a function of PVBr2 concentration (CPV2+ = 2-20mM) and temperature (10-60°). Both CaPV2+ and DPV2+ significantly varied with CPV2+. CPV2+ values were smaller than CPV2+, indicating that all of the dissolved PVBr2 are not actually electroactive. DPV2+ decreased with increasing CPV2+ (and CaPV2+), and the charge transport in the PEO matrix thus occurs not via the electron-hopping process between PV2+ and PV+ (the monocation state of PV2+), but via the phys. diffusion of PV2+. Further, it became apparent that at CPV2+ > 5mM the temperature dependence of DPV2+ is not the Arrhenius type and follows the VTF equation, i.e., PV2+ ions are transported along with the segmental motion of the PEO chains. Based on the DSC measurements of the PEO-LiClO4 (0.1M)-PVBr2 complexes, their glass transition temperatures decrease with increasing CPV2+, suggesting that PVBr2 function as a plasticizer. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

The Article related to propylviologen diffusion peo, redox electrochem propylviologen peo lithium perchlorate, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 15, 2022, Zhen, Guangjin; Wang, Furong; Yin, Biaolin published a patent.Electric Literature of 2229858-27-7 The title of the patent was Preparation of cyclobutane fused spiro indoline compounds as antitumor agents. And the patent contained the following:

The invention discloses the preparation of cyclobutane fused spiro indoline compounds with general formula I or II as antitumor agents [where X=O, S, CH = CH; R1=H, halogen group, ether group, aryl, siloxane or alkyl; R2=alkyl, siloxane, alkynyl or heterocyclic; R3=acetyl, p-methoxybenzyl, methylthiomethyl, tervaleryl, benzyloxycarbonyl, tert butoxycarbonyl, benzyl or p-methoxyphenyl], which has the advantages of simple preparation method, mild conditions, environmental protection and suitable for large-scale preparation For example, compound I (X=S, R1=H, R2=CH2CH2OCH3, R3=Ac) was prepared by photocatalytic cyclization of 1-acetyl-N-(2-methoxyethyl)-N-(thiophen-2-ylsulfonyl)-1H-indole-2-carboxamide. The title compounds have good inhibitory activity on hcc1806 cells and can be used to prepare anticancer agents. The experimental process involved the reaction of 4,4′-Bis(trifluoromethyl)-2,2′-bipyridinebis[3,5-difluoro-2-[5-methyl-2-pyridinyl)phenyl] iridium(III) hexafluorophosphate(cas: 2229858-27-7).Electric Literature of 2229858-27-7

The Article related to photocatalysis cyclization fused indoline isothiazole preparation treatment human cancer, Heterocyclic Compounds (More Than One Hetero Atom): Thiazoles, Isothiazoles and other aspects.Electric Literature of 2229858-27-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 1996, Yi, He; Xiaoyun, Wang; Zhaoxi, Liang published an article.Formula: C16H22Br2N2 The title of the article was The association behavior of alkyl viologens in electroredox studied by in-situ spectroscopy. And the article contained the following:

The association behavior of first reduced state of alkyl viologens and corresponding polyviologens(V+) were studied by in-situ spectroscopy. In electroreduction process, V.+ of alkyl viologens exist predominantly in the association form on the electrode surface, this phenomenon is attributed to the absorption of V.+ on the electrode. V.+ of polyviologens with shorter alkyl groups also exist mainly in the association form. However, V.+ of polyviologens with longer alkyl groups exist mainly in the monomeric form because the flexible segments may weaken the V.+ association The association behavior of electroreduction were compared with that of photoreduction as well as chem. reduction In addition, the effect of β-cyclodextrin inclusion on the association behavior of V.+ in electroreduction was studied. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Formula: C16H22Br2N2

The Article related to alkyl viologen polyviologen electroredox association, visible spectra viologen polyviologen, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Formula: C16H22Br2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem