Category: pyrazoles-derivatives

HPLC of Formula: 17190-29-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-Hydroxy-3-phenylpropanenitrile, is researched, Molecular C9H9NO, CAS is 17190-29-3, about Efficient lipase-catalyzed kinetic resolution and dynamic kinetic resolution of β-hydroxy nitriles. A route to useful precursors for γ-amino alcohols. Author is Pamies, Oscar; Backvall, Jan-E..

An efficient kinetic resolution of racemic β-hydroxy nitriles was performed via Candida antarctica lipase (N-435)-catalyzed transesterification. A variety of racemic alkyl, aryl, and aryloxymethyl substituted β-hydroxy nitriles was efficiently transformed to the corresponding enantiomerically pure acetates (ee >99% and conversion = 50%) with E values from 40 to >1000. The combination of the enzymic kinetic resolution with a ruthenium-catalyzed alc. racemization led to a dynamic kinetic resolution (ee’s up to 99%, yields up to 85%).

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

Computed Properties of C13H23NO4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-tert-Butyl 2-ethyl piperidine-1,2-dicarboxylate, is researched, Molecular C13H23NO4, CAS is 362703-48-8, about New short and general synthesis of three key Maillard flavour compounds: 2-Acetyl-1-pyrroline, 6-acetyl-1,2,3,4-tetrahydropyridine and 5-acetyl-2,3-dihydro-4H-1,4-thiazine. Author is Deblander, Jurgen; Van Aeken, Sam; Adams, An; De Kimpe, Norbert; Abbaspour Tehrani, Kourosch.

A general synthetic route was developed to obtain 3 key Maillard flavor compounds, namely 2-acetyl-1-pyrroline, 6-acetyl-1,2,3,4-tetrahydropyridine, and 5-acetyl-2,3-dihydro-4H-1,4-thiazine. The key step in the process is the methylenation reaction of azaheterocyclic carboxylic esters by dimethyltitanocene, giving rise to intermediate vinyl ethers which can be considered stable precursors for the title compounds Simple acidic treatment of these precursors can release the characteristic Maillard flavor compounds

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

Application of 1300746-79-5. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (1,10-Phenanthroline)(trifluoromethyl)copper(I), is researched, Molecular C13H8CuF3N2, CAS is 1300746-79-5, about Discovery and Optimization of Potent, Cell-Active Pyrazole-Based Inhibitors of Lactate Dehydrogenase (LDH). Author is Rai, Ganesha; Brimacombe, Kyle R.; Mott, Bryan T.; Urban, Daniel J.; Hu, Xin; Yang, Shyh-Ming; Lee, Tobie D.; Cheff, Dorian M.; Kouznetsova, Jennifer; Benavides, Gloria A.; Pohida, Katie; Kuenstner, Eric J.; Luci, Diane K.; Lukacs, Christine M.; Davies, Douglas R.; Dranow, David M.; Zhu, Hu; Sulikowski, Gary; Moore, William J.; Stott, Gordon M.; Flint, Andrew J.; Hall, Matthew D.; Darley-Usmar, Victor M.; Neckers, Leonard M.; Dang, Chi V.; Waterson, Alex G.; Simeonov, Anton; Jadhav, Ajit; Maloney, David J..

The authors report the discovery and medicinal chem. optimization of a novel series of pyrazole-based inhibitors of human lactate dehydrogenase (LDH). Utilization of a quant. high-throughput screening paradigm facilitated hit identification, while structure-based design and multiparameter optimization enabled the development of compounds with potent enzymic and cell-based inhibition of LDH enzymic activity. Lead compounds such as 63 exhibit low nM inhibition of both LDHA and LDHB, submicromolar inhibition of lactate production, and inhibition of glycolysis in MiaPaCa2 pancreatic cancer and A673 sarcoma cells. Moreover, robust target engagement of LDHA by lead compounds was demonstrated using the cellular thermal shift assay (CETSA), and drug-target residence time was determined via SPR. Anal. of these data suggests that drug-target residence time (off-rate) may be an important attribute to consider for obtaining potent cell-based inhibition of this cancer metabolism target.

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

Quality Control of 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 Comparison between Allura Red dye discoloration by activated carbon and azo bacteria strain. Author is Herrera-Garcia, Sabrina; Aguirre-Ramirez, Marisela; Torres-Perez, Jonatan.

Azo dyes are extensively used in different industries areas, such as Allura Red (R-40). Previous studies have proven its carcinogenic and mutagenic properties. For the removal of this type of emerging pollutant from effluents, tertiary treatment techniques such as activated charcoal are used. Alternatively, the use of bacteria is preferred because of its quick discoloration processes. The aim of the present investigation is to compare the efficiency removal of R-40 from aqueous media by a physicochem. process and a biol. one. The sorption kinetics of 10 ppm of R-40 was carried out with the use of activated charcoal based on walnut shells in water. Moreover, Pseudomonas aeruginosa and Bacillus subtilis stains were used sep. to decolorize nutrient broth media supplemented with 50 ppm of R-40. The activated carbon was capable to remove 99.87% of R-40 at 264 h, while the bacterial strains decolorized 92.13% (P. aeruginosa) and 88.21% (B. subtilis), resp., under microaerophilic conditions after 168 h. Therefore, both process strategies, physicochem. and biol. rapprochements, were able to remove the dye from aqueous media. R-40 was not cytotoxic to used strains, besides gram-pos. either neg. bacteria could be applied to turn over this azo dye in short term. Combination of both approaches may be implemented in tandem architecture.

The article 《Comparison between Allura Red dye discoloration by activated carbon and azo bacteria strain》 also mentions many details about this compound(25956-17-6)Quality Control of Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, you can pay attention to it or contacet with the author([email protected]) to get more information.

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Pyrazoles – an overview | ScienceDirect Topics

Kolman, Viktor; Kalcic, Filip; Jansa, Petr; Zidek, Zdenek; Janeba, Zlatko published the article 《Influence of the C-5 substitution in polysubstituted pyrimidines on inhibition of prostaglandin E2 production》. Keywords: pyrimidine preparation SAR prostaglandin E2 inhibitor; Inhibitor; Prostaglandin E(2); Pyrimidines; Suzuki-Miyaura reaction.They researched the compound: 2-Amino-4,6-dichloro-5-methylpyrimidine( cas:7153-13-1 ).Recommanded Product: 7153-13-1. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:7153-13-1) here.

As a part of a broader structure-activity relationship study of substituted 2-aminopyrimidines, the influence of the C-5 substitution on inhibition of prostaglandin E2 (PGE2) production was studied. Thirty compounds were prepared starting from the corresponding 2-amino-4,6-dichloropyrimidines using Suzuki cross-coupling. It was shown previously that 2-amino-4,6-dichloropyrimidines with smaller C-5 substituent (hydrogen and methyl) were devoid of significant activity, while 5-Bu derivatives exhibited prominent potency. In this study, on the other hand, both monoaryl- and bisarylpyrimidines were potent inhibitors of PGE2 production regardless the length of the C-5 substituent (hydrogen, Me, n-butyl). Moreover, the shorter the C-5 substituent the higher potency to inhibit PGE2 production was observed 2-Amino-4,6-diphenylpyrimidine was the best inhibitor of PGE2 production with IC50 = 3 nM and no cytotoxicity. The most potent inhibitors deserve further preclin. evaluation as potential anti-inflammatory agents.

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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemistry – An Asian Journal called Sequential SNAr Reaction/Suzuki-Miyaura Coupling/C-H Direct Arylations Approach for the Rapid Synthesis of Tetraaryl-Substituted Pyrazoles, Author is Morita, Taiki; Kobayashi, Daisuke; Matsumura, Keisuke; Johmoto, Kohei; Uekusa, Hidehiro; Fuse, Shinichiro; Takahashi, Takashi, which mentions a compound: 52287-51-1, SMILESS is BrC1=CC=C2OCCOC2=C1, Molecular C8H7BrO2, Category: pyrazoles-derivatives.

The rapid synthesis of 1,3,4,5-tetraaryl-substituted pyrazoles I (R1 = CN, NO2; R2 = 4-CF3, 4-MeO, 2-Me; R3 = CN, Me, CO2Et; R4 = 4-O2NC6H4, naphthalen-2-yl, 2,3-dihydro-1,4-benzodioxin-6-yl, etc.) was achieved through a sequence of SNAr reaction/Suzuki-Miyaura coupling/Pd-catalyzed direct arylations that used 3-iodo-1H-pyrazole as a scaffold. Compounds I were synthesized in a straightforward manner with no extra synthetic steps, such as protection/deprotection or the introduction of activating/directing groups, using readily available substrates and reagents. The developed synthetic approach enabled the structurally diverse synthesis of multiaryl-substituted pyrazoles without using glovebox techniques.

The article 《Sequential SNAr Reaction/Suzuki-Miyaura Coupling/C-H Direct Arylations Approach for the Rapid Synthesis of Tetraaryl-Substituted Pyrazoles》 also mentions many details about this compound(52287-51-1)Category: pyrazoles-derivatives, you can pay attention to it or contacet with the author([email protected]; [email protected]) to get more information.

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 Corncob Waste Based Adsorbent for Solid Phase Extraction of Tartrazine in Carbonated Drinks and Analytical Method using Ultra Performance Liquid Chromatography-Mass Spectrometry, published in 2020-11-30, 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, Formula: C18H14N2Na2O8S2.

Background: A new method has been developed for the determination of food dye tartrazine in soft drinks. Tartrazine is determined by hyphenated technique Ultra Performance Liquid Chromatog. coupled with Mass spectrometry. The solid-phase extraction was used for the extraction of tartrazine. Methods: For the LC-MS anal. of tartrazine acetonitrile, water (80:20) was used as a mobile phase whereas, the C-18 column was selected as the stationary phase. The chromatog. run was allowed for 1 min. The adsorbent of the solid-phase extraction was synthesized from the waste corn cob. Results: Method found to be linear in the range of 0.1 mg L-1-10 mg L-1, limits of detection and quantitation were found to be 0.0165 mgL-1 and 0.055 mgL-1, resp. Tartrazine, in the real sample, was found to be 20.39 mgL-1 and 83.26 mgL-1. Conclusion: The developed UPLC-MS method is rapid, simple, precise and can be used for the quant. anal. of tartrazine. The solid-phase extraction also involves a cost-effective procedure for extraction as it does not involve the com. cartridge.

The article 《Corncob Waste Based Adsorbent for Solid Phase Extraction of Tartrazine in Carbonated Drinks and Analytical Method using Ultra Performance Liquid Chromatography-Mass Spectrometry》 also mentions many details about this compound(25956-17-6)Formula: C18H14N2Na2O8S2, you can pay attention to it, because details determine success or failure

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Pyrazoles – an overview | ScienceDirect Topics

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Conversion of MDF wastes into a char with remarkable potential to remove Food Red 17 dye from aqueous effluents, published in 2020-07-31, which mentions a compound: 25956-17-6, mainly applied to medium density fiberboard waste char Food Red dye pyrolysis; Adsorption; Char; MDF; Pyrolysis; Reusable adsorbent, Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate.

Medium d. fiberboard (MDF) wastes were converted into an efficient char able to uptake Food Red 17 dye (FR17) from colored effluents. The yield of the pyrolysis process, in terms of char, was 29%. The produced char presented micro and mesoporous, with surface area of 218.8 m2 g-1 and total pore volume of 0.122 cm3 g-1. Regarding to the FR17 adsorption, removal percentages of 90% were found at pH 2 and using 0.5 g L-1 of char. Pseudo-first and pseudo-second order models were adequate to represent the adsorption kinetic profile, being the equilibrium reached within 20 min. Freundlich model was selected to represent the equilibrium data. The maximum adsorption capacity was 210 mg g-1. The adsorption of FR17 on the char was endothermic and phys. in nature. The char was efficient for 8 adsorption-desorption cycles, maintaining the same adsorption capacity. In brief, this work demonstrated a useful practice in terms of cleaner production It was possible add value to MDF wastes, generating an efficient and reusable adsorbent to treat colored effluents containing FR 17 dye.

The article 《Conversion of MDF wastes into a char with remarkable potential to remove Food Red 17 dye from aqueous effluents》 also mentions many details about this compound(25956-17-6)Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, you can pay attention to it or contacet with the author([email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]) to get more information.

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: 17190-29-3, is researched, SMILESS is N#CCC(O)C1=CC=CC=C1, Molecular C9H9NOJournal, Canadian Journal of Chemistry called Metal(II) Schiff base complexes as catalysts for the high-regioselective conversion of epoxides to β-hydroxy nitriles in glycol solvents, Author is Naeimi, Hossein; Moradian, Mohsen, the main research direction is regioselective preparation hydroxy nitrile; metal Schiff base catalyst ring opening epoxide potassium cyanide.Formula: C9H9NO.

A facile preparation of 3-hydroxy propanenitrile derivatives is described involving ring opening of epoxides with potassium cyanide in glycol solvents in the presence of Schiff base complexes as catalysts. This method occurs under neutral and mild conditions with high yields and high regioselectivity. Thus, several β-hydroxy nitriles, useful intermediates toward biol.-active mols., are easily obtained at room temperature

The article 《Metal(II) Schiff base complexes as catalysts for the high-regioselective conversion of epoxides to β-hydroxy nitriles in glycol solvents》 also mentions many details about this compound(17190-29-3)Formula: C9H9NO, you can pay attention to it, because details determine success or failure

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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, European Journal of Organic Chemistry called Trifluoromethyl/Perfluoroalkyl Corannulenes: Directed Synthesis and Photophysical Characterization, Author is Xia, Yeqing; Guo, TianJian; Baldridge, Kim K.; Siegel, Jay S., which mentions a compound: 1300746-79-5, SMILESS is F[C-](F)([Cu+]1[N]2=C3C4=[N]1C=CC=C4C=CC3=CC=C2)F, Molecular C13H8CuF3N2, Application of 1300746-79-5.

Cu-mediated methods for the synthesis of perfluoroalkyl-substituted corannulene derivatives were developed, including long-chain derivatives such as perfluorooctyl. The moderate to high yields of these mild and selective methods enable the production of sufficient amounts of material to conduct extensive electrochem. and photophys. measurements on a cognate series of compounds The electrochem. measurements reproduce well previous measurements. The optical measurements display a constant set of electronic transitions across the series.

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