Day: April 6, 2022

Related Products of 1300746-79-5. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (1,10-Phenanthroline)(trifluoromethyl)copper(I), is researched, Molecular C13H8CuF3N2, CAS is 1300746-79-5, about Copper-Mediated Perfluoroalkylation of Heteroaryl Bromides with (phen)CuRF. Author is Mormino, Michael G.; Fier, Patrick S.; Hartwig, John F..

The attachment of perfluoroalkyl groups onto organic compounds has been a major synthetic goal over the past several decades. Previously, our group reported phenanthroline-ligated perfluoroalkyl copper reagents, (phen)CuRF, which react with aryl iodides and aryl boronates to form the corresponding benzotrifluorides. Herein the perfluoroalkylation of a series of heteroaryl bromides with (phen)CuCF3 and (phen)CuCF2CF3 is reported. The mild reaction conditions allow the process to tolerate many common functional groups. Perfluoroethylation with (phen)CuCF2CF3 occurs in somewhat higher yields than trifluoromethylation with (phen)CuCF3, creating a method to generate fluoroalkyl heteroarenes that are less accessible from trifluoroacetic acid derivatives

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Quality Control of 2-Amino-4,6-dichloro-5-methylpyrimidine. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 2-Amino-4,6-dichloro-5-methylpyrimidine, is researched, Molecular C5H5Cl2N3, CAS is 7153-13-1, about 5-Substituted 2-amino-4,6-dihydroxypyrimidines and 2-amino-4,6-dichloropyrimidines. Synthesis and inhibitory effects on immune-activated nitric oxide production. Author is Jansa, Petr; Holy, Antonin; Dracinsky, Martin; Kolman, Viktor; Janeba, Zlatko; Kostecka, Petra; Kmonickova, Eva; Zidek, Zdenek.

A series of 5-substituted 2-amino-4,6-dihydroxypyrimidines were prepared by a modified condensation of the corresponding monosubstituted malonic acid diesters with guanidine in an excess of sodium ethoxide. The optimized procedure using Vilsmeier-Haack-Arnold reagent, followed by immediate deprotection of the (dimethylamino)methylene protecting groups, was developed to convert the 2-amino-4,6-dihydroxypyrimidine analogs to novel 5-substituted 2-amino-4,6-dichloropyrimidines in high yields. Pilot screening for biol. properties of the prepared compounds was done in mouse peritoneal cells using the in vitro nitric oxide (NO) assay. Irresp. of the substituent at the 5 position, 2-amino-4,6-dichloropyrimidines inhibited immune-activated NO production The most effective was 5-fluoro-2-amino-4,6-dichloropyrimidine with an IC50 of 2 μM (higher activity than the most potent reference compound) while the IC50s of other derivatives were within the range of 9-36 μM. The 2-amino-4,6-dihydroxypyrimidine counterparts were devoid of any NO-inhibitory activity. The compounds had no suppressive effects on the viability of cells.

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Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, is researched, Molecular C18H14N2Na2O8S2, CAS is 25956-17-6, about Simultaneous electrochemical quantification of foodstuff dyes allura red and tartrazine using a bare carbon paste electrode. Author is Rivera-Hernandez, S. I.; Corona-Avendano, S.; Vazquez-Huerta, G.; Palomar-Pardave, M.; Romero-Romo, M.; Ramirez-Silva, M. T..

A bare carbon paste electrode, BCPE, was used to determine simultaneously the foodstuff dyes Allura Red (AR) and Tartrazine (Trz) in aqueous media, achieving the following anal. parameters: for AR sensitivity of (0.126 ± 0.002) μA (mg l)-1 with a limit of detection (LOD) of (0.14 ± 0.004) mg l-1 and a Trz sensitivity of (0.392 ± 0.024) μA (mg l)-1 with a LOD of (0.310 ± 0.034) mg l-1. Addnl., the individual and simultaneous quantifications of AR and Trz in real samples, were performed through the electrochem. method proposed in this work. In the case of individual dyes quantification, the results were like those found using UV-vis spectrophotometry, however, contrary to the electrochem. method proposed in this work, the spectrophotometric method cannot be used for the simultaneous quantifications due to the dyes absorbance overlap. Furthermore, the BCPE is a robust electrode that, contrary to other modified CPE reported for this purpose, can be reused for multiple quantifications by simple mech. polishing of its electroactive surface, beside its excellent reproducibility, accuracy, and lifetime. Usually the dyes are found in concentrations of mg l-1 in foodstuffs, which makes this electrode suitable for use in foods and non-alc. beverages.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

SDS of cas: 52287-51-1. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Preparation and Application of Solid, Salt-Stabilized Zinc Amide Enolates with Enhanced Air and Moisture Stability. Author is Chen, Yi-Hung; Ellwart, Mario; Toupalas, Georgios; Ebe, Yusuke; Knochel, Paul.

The treatment of various N-morpholino amides with TMPZnCl·LiCl (TMP=2,2,6,6-tetramethylpiperidyl) and Mg(OPiv)2 in THF at 25 °C provides solid zinc enolates with enhanced air and moisture stability (t1/2 in air: 1-3 h) after solvent evaporation These enolates undergo Pd- and Cu-catalyzed cross-couplings with (hetero)aryl bromides as well as allylic and benzylic halides. The arylated N-morpholino amides were converted into various ketones by LaCl3·2 LiCl mediated acylation with Grignard reagents. The new, solid enolates were used to prepare a potent anti-breast-cancer drug candidate in six steps and 23 % overall yield.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Recommanded Product: 25956-17-6. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, is researched, Molecular C18H14N2Na2O8S2, CAS is 25956-17-6, about Modified clays as an efficient adsorbent for brilliant green, ethyl violet and Allura red dyes: kinetic and thermodynamic studies. Author is Ullah, Rehmat; Iftikhar, Faiza Jan; Ajmal, Muhammad; Shah, Afzal; Akhter, Muhammad Salim; Ullah, Haseeb; Waseem, Amir.

Clay minerals can effectively adsorb contaminants from aqueous effluents due to their good adsorption and high cation exchange capacity. However, naturally occurring clay materials possessing hydrophilic features are not especially effective for the removal of organic pollutants. Therefore, in the present work the issue of hydrophilicity is tackled by modification of the clay (Pakistan origin) to prepare organoclays. Hexadecylpyridinium chloride, cetyltrimethylammonium bromide, and sodium dodecyl sulfate were used as clay modifiers. Changes in the basal spacing of clay layers after modification with surfactants were determined through XRD anal. Chem. compositions of the clay and organoclays were determined by FTIR spectroscopy. Surface morphol. of the as-prepared organoclays was assessed from SEM anal. The modified clays (organoclays) were tested for their ability as potential adsorbents for three dyes from water: brilliant green, ethyl violet and allura red. All three modified clays showed high adsorption characteristics by removing (>90%) of all three dyes with an adsorption capacity ranging from 35 to 85 mg/g. The time-dependent adsorption experiments showed that the rates of adsorption of dyes on organoclays were fast, adsorbing maximum amounts of dyes ranging from 15 to 80 mins of contact time. The adsorption kinetic study revealed that the dye removal process is mainly governed by a pseudo-1st order mechanism. Thus, surfactant-modified clays are an excellent choice as cost-effective and efficient adsorbents for the purification of water from dye contaminants.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Recommanded Product: 52287-51-1. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about New strategy for the synthesis of N-aryl pyrroles: Cu-catalyzed C-N cross-coupling reaction of trans-4-hydroxy-L-proline with aryl halides. Author is Reddy, V. Prakash; Kumar, A. Vijay; Rao, K. Rama.

Trans-4-Hydroxy-L-proline is used for the first time as an effective nucleophilic coupling partner with aryl halides mediated by copper iodide with Cs2CO3 as the base and DMSO as the solvent. Utilizing this protocol cross-coupling of trans-4-hydroxy-L-proline with a wide variety of substituted aryl halides to produce N-aryl pyrroles in moderate to good yields.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Self-assembly of TiO2/Fe3O4/SiO2 microbeads: A green approach to produce magnetic photocatalysts》. Authors are Brossault, David F. F.; McCoy, Thomas M.; Routh, Alexander F..The article about the compound:Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonatecas:25956-17-6,SMILESS:O=S(C1=CC=C2C(/N=N/C3=CC(C)=C(S(=O)([O-])=O)C=C3OC)=C(O)C=CC2=C1)([O-])=O.[Na+].[Na+]).SDS of cas: 25956-17-6. Through the article, more information about this compound (cas:25956-17-6) is conveyed.

A green approach for producing magnetic photocatalysts via direct agglomeration of com. nanoparticles in emulsion is shown. Aggregation is attributed to charge screening by salt addition which reduces stabilizing repulsive forces between particles, and different nanoparticles (TiO2, Fe3O4 and SiO2) serve to imbue the final agglomerates with desired adsorption, photodegradation and magnetic properties. Titania doped magnetic silica microbeads (TiO2/Fe3O4/SiO2) were produced at room temperature by CaCl2-induced aggregation of nanoparticles in a reverse emulsion template. The beads were characterized using optical microscopy, SEM, STEM, EDX and zeta potential measurements. The adsorption and photocatalytic properties of the system as well as its reusability were investigated using Rhodamine B and Methylene Blue as model pollutants. Magnetically responsive beads approx. 3-9μm in diameter incorporating SiO2, TiO2 and Fe3O4 nanoparticles were produced. Adsorption and photodegradation properties of the beads were confirmed by bleaching solutions of Rhodamine B, Methylene Blue as well as mixtures of both dyes. Reusability of the beads after magnetic separation was demonstrated, exhibiting a dye removal efficiency greater than 93% per cycle for three consecutive cycles of UV-light irradiation This method is simpler than conventional sol-gel methods and offers a green and easy to implement approach for producing structured functional materials.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 814-94-8, is researched, SMILESS is O=C([O-])C([O-])=O.[Sn+2], Molecular C2O4SnJournal, ACS Applied Energy Materials called Scalable In Situ Synthesis of 2D-2D-Type Graphene-Wrapped SnS2 Nanohybrids for Enhanced Supercapacitor and Electrocatalytic Applications, Author is Lonkar, Sunil. P.; Pillai, Vishnu V.; Patole, Shashikant P.; Alhassan, Saeed M., the main research direction is graphene wrapped tin sulfide nanohybrid enhanced supercapacitor electrocatalyst.Application of 814-94-8.

Recently, the development of layered two-dimensional (2D) material-based nanostructured hybrids has witnessed a remarkable advancement as energy storage and conversion materials. Herein, we present an all-solid-state and scalable approach to integrate 2D-2D-type SnS2 and graphene-layered nanosheets (SnS2/G) and assessed its potential as an active material for the high-performance supercapacitor and electrocatalyst for the hydrogen evolution reaction (HER). In this in situ solvent-free strategy, a tin precursor and graphite oxide (GO) were homogeneously ball-milled with surfeit yet nontoxic elemental sulfur and subjected to a moderate thermal treatment to obtain a unique 2D-2D-type SnS2/G nanohybrid. The characterization revealed that the in situ formed SnS2 nanosheets were uniformly distributed and wrapped within graphene layers. The resulting nanohybrids demonstrated a superior specific capacitance of 565 F g-1 and retain a significant charge-discharge cyclic stability (90%/3000 cycles). Similarly, a resultant sym. device delivered a high energy d. of 23.5 Wh kg-1 and power d. 880 W kg-1 at a c.d. of 1 A g-1. Furthermore, the resulting SnS2/G nanohybrid provided a much lower HER overpotential of 0.36 V than SnS2 (0.6 V) to attain a c.d. of 10 mA cm-2 in the alk. electrolyte. The proposed strategy presents an environmentally benign avenue to integrate electrochem. active metal-sulfide-based 2D-2D-type nanostructured materials with superior energy storage and conversion capabilities.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, is researched, Molecular C18H14N2Na2O8S2, CAS is 25956-17-6, about Certified food dyes in over the counter medicines and supplements marketed for children and pregnant women, the main research direction is pregnancy food cosmetic dye medicine diet supplement; FD&C dyes; Gummies; High performance liquid chromatography; Over-the-counter medicine; Vitamins.Safety of Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate.

Food, Drug, & Cosmetic (FD&C) dyes are synthetic color additives used in food, prescription drugs and over-the-counter medicines (OTCs). Consumption of FD&C dyes has been associated with neurobehavioral behavior in some children. The amount of dye used in com. products is proprietary, making it difficult to assess dietary intake and determine exposure in children. To date, no studies have examined FD&C dyes in OTCs or vitamins in the United States. To address this, FD&C Red Number 40, Yellow Number 5, Yellow Number 6, Blue Number 1, and Blue Number 2 levels were measured in prenatal vitamin tablets, children’s chewable and gummy vitamins, pain reliever tablets and syrups, and cough/cold/allergy tablets and syrups. Dyes were isolated using solid phase extraction (SPE) and quantified by high performance liquid chromatog. (HPLC). Dye levels varied between products with highest levels in pain reliever and cough/cold/allergy syrups. Significant variability was observed within some brands. Degradation of Red Number 40, Blue Number 1, and Yellow Number 6 was observed in the vitamin gummies. Intake of FD&C Red Number 40 is two times the US FDA ADI (accepted daily intake) for some children’s pain reliever syrups and almost three times the US FDA ADI for some cough/cold/allergy syrups.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Titania/electro-reduced graphene oxide nanohybrid as an efficient electrochemical sensor for the determination of allura red, published in 2020, which mentions a compound: 25956-17-6, Name is Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, Molecular C18H14N2Na2O8S2, Synthetic Route of C18H14N2Na2O8S2.

Titania/electro-reduced graphene oxide nanohybrids (TiO2/ErGO) were synthesized by the hydrolysis of titanium sulfate in graphene oxide suspension and in situ electrochem. reduction It provides a facile and efficient method to obtain nanohybrids with TiO2 nanoparticles (TiO2 NPs) uniformly coated by graphene nanoflakes. TiO2/ErGO nanohybrids were characterized by transmission electron microscopy, X-ray diffraction, cyclic voltammogram, and electrochem. impedance spectroscopy in detail. Compared with pure ErGO and TiO2 NPs, TiO2/ErGO nanohybrids greatly enhanced the electrocatalytic activity and voltammetric response of Allura Red. In the concentration range of 0.5-5.0μM, the anodic peak currents of Allura Red were linearly correlated to their concentrations However, the linear relationship was changed to the semilogarithmic relationship at a higher concentration region (5.0-800μM). The detection limit (LOD) was 0.05μM at a signal-to-noise ratio of 3. The superior sensing performances of the proposed sensor can be ascribed to the synergistic effect between TiO2 NPs and ErGO, which provides a favorable microenvironment for the electrochem. oxidation of Allura Red. The proposed TiO2/ErGO/GCE showed good reproducibility and stability both in determination and in storage, and it can accurately detect the concentration of Allura Red in milk drinks, providing an efficient platform for the sensitive determination of Allura Red with high reliability, simplicity, and rapidness.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics