Month: November 2022

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 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 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

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 May 31, 2020, Rodriguez-Medina, Carlos; Martinez-Cuadron, David; Cano, Isabel; Gil, Cristina; Tormo, Mar; Martinez-Sanchez, Maria del Pilar; Bernal del Castillo, Teresa; Serrano-Lopez, Josefina; Benavente, Celina; Herrera-Puente, Pilar; Garcia-Boyero, Raimundo; Lavilla-Rubira, Esperanza; Amigo, Ma. Luz; Sayas-Lloris, Ma. ose; Bergua-Burgues, Juan M.; Perez-Simon, Jose Antonio; Rodriguez, Gabriela; Espadana, Ana; Vidriales-Vicente, Belen; Fernandez, Rosa; Lopez-Lorenzo, Jose Luis; Lopez, Maria; Garcia-Fortes, Maria; Labrador Gomez, Jorge; Colorado-Araujo, Mercedes; Sossa-Melo, Claudia Lucia; Aguilar, Eliana; Montesinos Fernandez, Pau published an article.HPLC of Formula: 132-20-7 The title of the article was Performance of prognostic scoring systems in elderly patients with acute myeloid leukaemia on intensive chemotherapy: A PETHEMA registry study. And the article contained the following:

Selection of elderly patients (aged ≥60 years) for intensive chemotherapy treatment of acute myeloblastic leukemia (AML) remains challenging. Several cooperative groups such as Acute Leukemia French Association (ALFA), Haematol. Oncol. Clin. Studies Group (HOCSG) and MD Anderson Cancer Center (MDACC) have developed predictive models to select those patients who can benefit from intensive chemotherapy. Our purpose is to validate and compare these three models in a cohort of patients treated in real-life setting. For this, a total of 1724 elderly AML patients and treated with intensive chemotherapy regimens were identified in the PETHEMA registry. Median age was 67.2 years (range, 60-84,9) and median overall survival [OS] 9 mo (95% confidence interval [CI], 8.2-9.7). Taking into account the ALFA group’s model, patients likely to benefit from intensive chemotherapy had longer OS (14 mo, 95% CI 12.3-15.7) than those unlikely to benefit (5 mo, 95% CI 4.1-5.9; p < 0.001). Significant differences in OS were observed between patients with favorable risk (17 mo, 95% CI 13.2-20.7), intermediate risk (11 mo, 95% CI 9.3-12.6) and adverse risk (6 mo, 95% CI 5.1-6.4; p < 0.001) according to the HOCSG model. No significant differences in OS were observed between patients with 0, 1, 2 or ≥3 points according to the MDACC model. However, when patients with ≥1 point were compared with those with 0 points, median OS was significantly longer in the latter [15 mo (95% CI 12.1-17.8) vs 7 (95% CI 5.7-8.5)]. This retrospective study validates predictive models proposed by the ALFA, HOCSG and MDACC groups in this real-life cohort. The experimental process involved the reaction of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate(cas: 132-20-7).HPLC of Formula: 132-20-7

The Article related to human acute myeloid leukemia prognosis intensive chemotherapy, acute myeloid leukemia, elderly, intensive chemotherapy, overall survival, prognosis, Mammalian Pathological Biochemistry: Oncology and other aspects.HPLC of Formula: 132-20-7

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

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 September 25, 2012, Lai, Yonghua; Huang, Taomin; Wang, Donglei; Chen, Nianzu published an article.HPLC of Formula: 132-20-7 The title of the article was Determination of pheniramine maleate content in pheniramine maleate-naphazoline hydrochloride eye drops by reverse-phase high performance liquid chromatography. And the article contained the following:

The purpose of the research is to develop a reverse-phase high performance liquid chromatog.(RP-HPLC) method to determine pheniramine maleate concentration in the pheniramine maleate-naphazoline hydrochloride eye drops. The HPLC separation was carried out on an Agilent C18(150 mm*4.6 mm, 5μm) column, using a UV detector with 262 nm wavelength. The mobile phase was 0.1 mol·L-1 ammonium acetate buffer(0.5% triethylamine, adjusted to pH 4.0 with acetic acid)-methanol solution=97:3(V/V), with velocity of 1 mL·min-1 and column temperature of 20°C. The good linearity of pheniramine maleate under chromatog. was found(r>0.999, n=7). The recovery values were between 97% and 103%(n=3). The RSD values were below 2.0%(n=3). The sample was stable in 24 h. The samples reached standardized qualification. RP-HPLC is proved to be a simple, swift, accurate and reliable method and has good reproducibility. The experimental process involved the reaction of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate(cas: 132-20-7).HPLC of Formula: 132-20-7

The Article related to pheniramine maleate content rp hplc, Pharmaceutical Analysis: Natural Drug Materials and other aspects.HPLC of Formula: 132-20-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 1, 1994, Yuasa, Makoto; Tsutsumi, Takeo; Miyadate, Yasuo; Ohtani, Yutaka; Sekine, Isao; Kuzushima, Toshio published an article.Electric Literature of 636-73-7 The title of the article was Synergistic effect of organic additives and pulse-current plating in a gold electrodeposition acid bath and gold plating film corrosion resistance. And the article contained the following:

Effects of addition of pyridine derivatives such as aminopyridines and pyridinesulfonic acids into a citric acid-base Au electrodeposition solution were discussed. Using both pyridine additives and pulse current effectively lowered porosity and increased deposition efficiency compared to using only d.c. or pulse current and both d.c. and pyridine additives. 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 pulse current gold electrodeposition pyridine additive, Electrochemistry: Industrial Cathodic Processes and other aspects.Electric Literature of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 1, 2013, Gezerman, A. O.; Corbacioglu, B. D. published an article.COA of Formula: C5H5NO3S The title of the article was Iron(II) acetylacetonate containing brightener and sulphur containing carrier in nickel plating. And the article contained the following:

The effects of an Fe(II) acetylacetonate containing brightening agent and a carrier on color and mech. properties of Ni plating were studied to determine optimal electroplating process parameters. The brightening agent contained metasulfobenzaldehyde, pyridine-3-sulfonic acid, p-vinylbenzenesulfonic acid, o-benzoylsulfonamide, Na saccharine and Fe(II) acetylacetonate. The carrier comprised Na saccharine and Na allyl sulfonate in H2O. Plating color was analyzed by visible region spectrophotometry at 350 nm under 6500 K illumination (CIE Standard Illuminant D65). Electron microscopy confirmed that carrier facilitated Ni deposition onto the surface and increased cohesion, thus allowing complete coverage. Also, brightening agent increased the bath pH, while carrier did not. In bending experiments on a coated plate, brightening agent increased H embrittlement, although desired decorative appearance was obtained. Finally, the optimum concentrations of carrier and brightening agent are 12 and 0·4 g L-1, resp. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).COA of Formula: C5H5NO3S

The Article related to iron acetylacetonate brightener additive carrier nickel plating, Electrochemistry: Industrial Cathodic Processes and other aspects.COA of Formula: C5H5NO3S

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem