Tag: 100-200

On August 31, 2010, Gezerman, Ahmet Ozan; Corbacioglu, Burcu Didem published an article.HPLC of Formula: 636-73-7 The title of the article was Analysis of the characteristics of nickel-plating baths. And the article contained the following:

Ni plating processes, popularly used in Europe since 1950s, were increasingly employed in Turkey in recent years. As a result, industrial usage has developed rapidly. Ni plating is the preferred process for this study because of the uniformity of the plating thickness on the plated surface and the ease with which complex components can be plated. It is also resistant to corrosion and has good levels of hardness. In this experiment, the following parameters were studied: the effect of varying the amount of Ni, the thickness of the plating, and sheen (whether shiny or dull). Brightening and carrying agents were used to determine the best operational parameters for the Kale Kilit Factory. The compositions of the brightening and carrying agents used in the experiment are included in this text. Addnl., studies were conducted on how the plating color changed when compared to the original bath as a result of using Fe2+ complex concentration in Ni plating baths, as a brightening agent and for analyzing the color of the plated sample, under a visible region spectrophotometer at 350 nm and 6500 K light power and D65 (Average North Sky Daylight) light. In the authors’ research, the most important feature of anal. is that the desired color effect was obtained by using brightening agents containing Fe2+ complex concentration without any interference from any colorant after Ni plating by electrolysis. In this study where Ni plating bath characteristics are researched, phys. tests such as brittle test are applied to the plated materials, which provide the authors important ideas about the accuracy of the choices made according to standards The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).HPLC of Formula: 636-73-7

The Article related to analysis nickel plating bath, Electrochemistry: Industrial Cathodic Processes and other aspects.HPLC of Formula: 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On November 30, 2012, Ye, Yanq-Qing; Yang, Xin-Zhou; Li, Xeu-Sen; Yao, Fu-Quan; Hu, Qiu-Fen published an article.Electric Literature of 51566-22-4 The title of the article was Study on solid-phase extraction and graphite furnace atomic absorption spectrometer (GF-AAS) for the determination of platinum, palladium, and gold. And the article contained the following:

A new sorbent was prepared by immobilization of 3-methyl-2,6-diaminopyridine (MDMP) on MCI-GEL resin and then used as a solid phase extraction sorbent for trace Pt, Pd, and Au ions. The parameter for solid phase extraction (effects of pH, the sample flow rate and volume, the elution condition, and the potentially interfering ions) were carefully investigated. In the desorbed medium, Pt, Pd, and Au were determination by graphite furnace at. absorption spectrometer (GFAAS). The effect on the at. signal was eliminated by selecting proper pyrolysis and atomization temperatures for all analysts. This method was applied to the determination of trace Pt, Pd, and Au in the geol. samples. The RSDs were 3.6-4.8 %. The standard recoveries (three different concentrations of markers: 0.02, 0.04, and 0.08 μg) ranged from 92-107 %. The results were satisfactory. The experimental process involved the reaction of 3-Methylpyridine-2,6-diamine(cas: 51566-22-4).Electric Literature of 51566-22-4

The Article related to platinum palladium gold determination solid extraction aas chelating sorbent, Inorganic Analytical Chemistry: Determinations and other aspects.Electric Literature of 51566-22-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zoltewicz, John A.; Cross, Robert E. published an article in 1974, the title of the article was Two-step conversion of pyridines into their ylides. Compensatory effects of substituents on reactivity.Recommanded Product: 636-73-7 And the article contains the following content:

Pseudo-1st-order rate constants were determined for the H-D exchange at the C-2 and C-6 positions of I (R = H, Cl, CO2-, SO3-, MeO, ND2) in neutral D2O at 197.5 – 217.9.degree.; the reaction occurred by conversion of the pyridines into pyridinium ions and then into pyridinium ylides. The substituent effects on each step were compensatory. The calculated rate constant ratios agreed with the observed data. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Recommanded Product: 636-73-7

The Article related to pyridine hydrogen exchange reaction, substituent effect pyridine exchange, ylide formation pyridine reactivity, Physical Organic Chemistry: Structure Effects and other aspects.Recommanded Product: 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 1994, Moshohoritou, R.; Tsangaraki-Kaplanoglou, I.; Kotsira, C. published an article.Computed Properties of 636-73-7 The title of the article was The effect of some additives on the throwing power and stability of tin(II) solutions during A.C. Coloring of anodized aluminum. Part I: Heterocyclic organic compounds. And the article contained the following:

Nicotinic acid, piperidine-4-carboxylic acid, imidazole, 2-picolinic acid, 3-pyridinesulfonic acid, piperazine and piperidine were used as additives in electrolytic coloring of anodized aluminum from tin(II) solutions Their influence on the throwing power and their resistance to atm. oxidation were studied. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Computed Properties of 636-73-7

The Article related to electrocoloring anodized aluminum tin heterocyclic compound, Electrochemistry: Industrial Anodic Processes and other aspects.Computed Properties of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 31, 2020, Xu, Guangpeng; Zhang, Yajing; Sun, Jihong; Bai, Shiyang; Zhao, Hongwu published an article.Electric Literature of 75449-26-2 The title of the article was Synthesis of Extended Bipyridine-proline Chiral Catalysts and Resulting Effects on the Asymmetric Aldol Reactions of Bulkier Aldehyde Derivatives with Cyclohexanone. And the article contained the following:

Axially-unfixed 2,2′-bipyridine-based chiral catalysts were synthesized using enantiopure amino acids as chiral sources, which were successfully used in asym. aldol reactions of p-nitrobenzaldehyde with cyclohexanone, while the bulkier aldehyde derivatives (2-naphthaldehyde, 9-anthracenecarboxaldehyde, and 1-pyrenecarboxaldehyde) were selected to further elucidate the catalytic properties. Particularly, the influences of the bipyridine-proline chiral structures and the polarities of used solvents (petroleum ether, toluene, CH2Cl2, ethanol, DMF, DMSO, and water) on the catalytic performance were investigated. The results indicated that the structure of bipyridine catalysts, the mol. volume of aldehydes, and the polarity of solvents have significant effects on the catalytic activities, in which, the smaller steric effects were conducive to the improvement of the yields and stereoselectivities for asym. aldol reaction, along with the increased polarity of used solvents and the decreased mol. volume of aldehydes. Meanwhile, the chem. identity of all compounds was confirmed by 1H-NMR, 13C-NMR, HRMS, and HPLC anal. 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 bipyridinyl proline preparation, cyclohexanone aryl aldehyde bipyridinyl proline catalyst diastereoselective aldol reaction, aryl hydroxymethyl cyclohexanone preparation, General Organic Chemistry: Synthetic Methods and other aspects.Electric Literature of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On June 1, 2018, Zhu, Cheng-Liang; Wang, Cheng; Qin, Qi-Xue; Yruegas, Sam; Martin, Caleb D.; Xu, Hao published an article.Related Products of 109660-12-0 The title of the article was Iron(II)-Catalyzed Azidotrifluoromethylation of Olefins and N-Heterocycles for Expedient Vicinal Trifluoromethyl Amine Synthesis. And the article contained the following:

We report herein an iron-catalyzed azidotrifluoromethylation method for expedient vicinal trifluoromethyl primary-amine synthesis. This method is effective for a broad range of olefins and N-heterocycles, and it facilitates efficient synthesis of a wide variety of vicinal trifluoromethyl primary amines, including those that prove difficult to synthesize with existing approaches. Our preliminary mechanistic studies revealed that the catalyst-promoted azido-group transfer proceeds through a carbo-radical instead of a carbocation species. Characterization of an active iron catalyst through X-ray crystallog. studies suggests that in situ generated, structurally novel iron-azide complexes promote the oxidant activation and selective azido-group transfer. 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 trifluoromethyl primary amine preparation, olefin azidotrifluoromethylation iron catalyst, n-heterocycles, azides, iron catalysis, olefins, trifluoromethyl amines, General Organic Chemistry: Synthetic Methods and other aspects.Related Products of 109660-12-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 4, 2018, Shen, Shou-Jie; Zhu, Cheng-Liang; Lu, Deng-Fu; Xu, Hao published an article.Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine The title of the article was Iron-Catalyzed Direct Olefin Diazidation via Peroxyester Activation Promoted by Nitrogen-Based Ligands. And the article contained the following:

We herein report an iron-catalyzed direct diazidation method via activation of bench-stable peroxyesters promoted by nitrogen-based ligands. This method is effective for a broad range of olefins and N-heterocycles, including those that are difficult substrates for the existing olefin diamination and diazidation methods. Notably, nearly a stoichiometric amount of oxidant and TMSN3 are sufficient for high-yielding diazidation for most substrates. Preliminary mechanistic studies elucidated the similarities and differences between this method and the benziodoxole-based olefin diazidation method previously developed by us. This method effectively addresses the limitations of the existing olefin diazidation methods. Most notably, previously problematic nonproductive oxidant decomposition can be minimized. Furthermore, X-ray crystallog. studies suggest that an iron-azide-ligand complex can be generated in situ from an iron acetate precatalyst and that it may facilitate peroxyester activation and the rate-determining C-N3 bond formation during diazidation of unstrained olefins. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

The Article related to iron catalysis direct stereoselective olefin diazidation peroxyester activation, n-heterocycles, diamination, diazidation, iron catalyst, olefins, peroxyesters, General Organic Chemistry: Synthetic Methods and other aspects.Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhao, Hong-Wu; Li, Hai-Long; Yue, Yuan-Yuan; Sheng, Zhui-Hui published an article in 2013, the title of the article was Diastereoselective and Enantioselective Michael Addition Reactions of Ketones and Aldehydes to Nitro Olefins Catalyzed by C2-Symmetric Axially-Unfixed Biaryl-Based Organocatalysts Derived from Enantiopure α-Proline.Reference of [2,2′-Bipyridine]-3,3′-diamine And the article contains the following content:

A new class of axially-unfixed biaryl-based pyrrolidines with C2-symmetry, e.g. I [X = C, N], were designed and synthesized by using enantiopure α-proline as a chiral source. These bifunctional organocatalysts provided Michael adducts in high chem. yields (up to 99 %) and with excellent stereoselectivities (up to 99:1 dr and 96 % ee) in the direct Michael addition reactions of a variety of ketones and aldehydes to nitro olefins. The transition states were proposed to clarify the stereochem. course of the examined reactions. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Reference of [2,2′-Bipyridine]-3,3′-diamine

The Article related to preparation biaryl pyrrolidine c 2 symmetry michael addition catalyst, stereoselective michael addition ketone aldehyde nitro olefin, General Organic Chemistry: Synthetic Methods and other aspects.Reference of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 7, 2022, Li, Hanyuan; Wang, Mei-Ling; Liu, Yu-Wen; Li, Ling-Jun; Xu, Hui; Dai, Hui-Xiong published an article.Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine The title of the article was Enones as Alkenyl Reagents via Ligand-Promoted C-C Bond Activation. And the article contained the following:

A β-carbon elimination strategy for alkene(sp2)-C(O) bonds to realize the olefination of unstrained enones via a vinyl palladium species, which delivered a series of conjugated polyene compounds were reported. The protocol features broad substrate scope, functional group tolerance and can be extended to dibenzylideneacetone (dba) substrates for olefination, alkynylation, arylation and amination, which demonstrates the generality of the approach and affords two valuable products in one pot. Furthermore, the modification of natural products (β-ionone and acetyl cedrene) and synthesis of natural products (piperine, lignarenone, novenone) highlight the potential utility of the reaction. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

The Article related to enone acrylate palladium oxazole catalyst diastereoselective olefination, alkadienoate preparation, General Organic Chemistry: Synthetic Methods and other aspects.Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 2, 2015, Wang, Yansong; Hausch, Felix published a patent.HPLC of Formula: 97483-79-9 The title of the patent was Bicyclic aza-amides for treatment of psychiatric disorders. And the patent contained the following:

The present invention relates to compounds of formula (I) having a bicyclic aza-amides scaffold, pharmaceutically acceptable salts of these compounds and pharmaceutical compositions containing at least one of these compounds together with pharmaceutically acceptable carrier, excipient and/or diluents. Said bicyclic aza-amides compounds can be used for prophylaxis and/or treatment of psychiatric disorders and neurodegenerative diseases, disorders and conditions. The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).HPLC of Formula: 97483-79-9

The Article related to bicyclic aza amide preparation fkbp inhibitor psychiatric neurol disease, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.HPLC of Formula: 97483-79-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem