Atanassova, Maria’s team published research in Separation Science and Technology (Philadelphia, PA, United States) in 51 | CAS: 4551-69-3

Separation Science and Technology (Philadelphia, PA, United States) published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one.

Atanassova, Maria published the artcileCoordination chemistry of a para-tert-octylcalix[4]arene fitted with phosphinoyl pendant arms towards 4f-elements: Extraction, synergism, separation, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, the publication is Separation Science and Technology (Philadelphia, PA, United States) (2016), 51(1), 49-56, database is CAplus.

The solvent extraction of trivalent lanthanoids (Ln3+) by 5,11,17,23-tetra(para-tert-octyl)-25,26,27,28-tetrakis(dimethylphosphinoylmethoxy)calix[4]arene (S), bearing four phosphine oxide donor groups at the lower rim as synergistic agent in combination with a 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP) in CHCl3 from chloride medium at μ = 0.1 was quant. described in the form of LnP3·S complexes. The role of the synergistic agent on the extraction process was discussed. The values of the separation factors have been evaluated. On the basis of the IR and NMR spectra the stoichiometry and the structure of the solid mixed complex of Eu(III) with HP and S were proposed.

Separation Science and Technology (Philadelphia, PA, United States) published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Yang, Bin’s team published research in Journal of Medicinal Chemistry in 61 | CAS: 763120-58-7

Journal of Medicinal Chemistry published new progress about 763120-58-7. 763120-58-7 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Boronic Acids,Boronic acid and ester, name is 1H-Pyrazole-4-boronic acid, and the molecular formula is C11H12O4, Synthetic Route of 763120-58-7.

Yang, Bin published the artcileAdventures in Scaffold Morphing: Discovery of Fused Ring Heterocyclic Checkpoint Kinase 1 (CHK1) Inhibitors, Synthetic Route of 763120-58-7, the publication is Journal of Medicinal Chemistry (2018), 61(3), 1061-1073, database is CAplus and MEDLINE.

Checkpoint kinase 1 (CHK1) inhibitors are potential cancer therapeutics that can be utilized for enhancing the efficacy of DNA damaging agents. Multiple small mol. CHK1 inhibitors from different chem. scaffolds have been developed and evaluated in clin. trials in combination with chemotherapeutics and radiation treatment. Scaffold morphing of thiophene carboxamide ureas (TCUs), such as AZD7762 (1) and a related series of triazoloquinolines (TZQs), led to the identification of fused-ring bicyclic CHK1 inhibitors, 7-carboxamide thienopyridines (7-CTPs), and 7-carboxamide indoles. X-ray crystal structures reveal a key intramol. noncovalent sulfur-oxygen interaction in aligning the hinge-binding carboxamide group to the thienopyridine core in a coplanar fashion. An intramol. hydrogen bond to an indole NH was also effective in locking the carboxamide in the preferred bound conformation to CHK1. Optimization on the 7-CTP series resulted in the identification of lead compound 44, which displayed respectable drug-like properties and good in vitro and in vivo potency.

Journal of Medicinal Chemistry published new progress about 763120-58-7. 763120-58-7 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Boronic Acids,Boronic acid and ester, name is 1H-Pyrazole-4-boronic acid, and the molecular formula is C11H12O4, Synthetic Route of 763120-58-7.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Nasir Baig, R. B.’s team published research in Green Chemistry in 15 | CAS: 724710-02-5

Green Chemistry published new progress about 724710-02-5. 724710-02-5 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Pyrazole,Boronic Acids,Boronic acid and ester, name is (1H-Pyrazol-5-yl)boronic acid, and the molecular formula is C3H5BN2O2, Product Details of C3H5BN2O2.

Nasir Baig, R. B. published the artcileOrganic synthesis via magnetic attraction: benign and sustainable protocols using magnetic nanoferrites, Product Details of C3H5BN2O2, the publication is Green Chemistry (2013), 15(2), 398-417, database is CAplus.

Magnetic nano-catalysts have been prepared using simple modification of iron ferrites. The nm size range of these particles facilitates the catalysis process, as an increased surface area is available for the reaction; the easy separation of the catalysts by an external magnet and their recovery and reuse are addnl. beneficial attributes. Glutathione bearing nano-ferrites have been used as organocatalysts for the Paal-Knorr reaction and homocoupling of boronic acids. Nanoferrites, post-synthetically modified by ligands, were used to immobilize nanometals (Cu, Pd, Ru, etc.) which enabled the development of efficient, sustainable and green procedures for azide-alkynes-cycloaddition (AAC) reactions, C-S coupling, O-allylation of phenol, Heck-type reactions and hydration of nitriles.

Green Chemistry published new progress about 724710-02-5. 724710-02-5 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Pyrazole,Boronic Acids,Boronic acid and ester, name is (1H-Pyrazol-5-yl)boronic acid, and the molecular formula is C3H5BN2O2, Product Details of C3H5BN2O2.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Reimlinger, Hans K.’s team published research in Chemische Berichte in 94 | CAS: 3553-12-6

Chemische Berichte published new progress about 3553-12-6. 3553-12-6 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Amine,Amide, name is 3-Acetamidopyrazole, and the molecular formula is C5H7N3O, Application In Synthesis of 3553-12-6.

Reimlinger, Hans K. published the artcile3(5)-Diazopyrazole, Application In Synthesis of 3553-12-6, the publication is Chemische Berichte (1961), 1036-41, database is CAplus.

3(5)-Aminopyrazole (I) prepared from pyrazole-3(5)-carboxylic acid hydrazide (II) gave with iso-AmONO the diazonium chloride (III). The diazotization in weakly acidic solution yielded the diazoamino compound III was converted in weakly alk. solution to the CHCl3-soluble unstable 3(5)-diazopyrazole (IV). III and IV gave with HI the 3(5)-iodopyrazole (V) and with 2-C10H7OH (VI) an O-free coupling product. Et 3(5)-pyrazolecarboxylate (342 g.) (from 300 g. N2CHCO2Et and C2H2) in 200 g. anhydrous N2H4 heated 8 h. on the water bath and evaporated in vacuo yielded 390 g. II, m. 166-8° (MeOH). II (390 g.) in 2.5 l. 2N HCl treated with stirring at 0° with solid NaNO2 in small portions gave 340 g. pyrazole-3(5)-carboxylic acid azide (VII), m. 158-60°. VII (340 g.) in 500 cc. absolute EtOH heated 24 h. on the water bath gave 299 g. Et N-[3(5)-pyrazolyl]urethane (VIII), m. 155-7° (MeOH). VIII (299 g.) and 920 g. Ba(OH)2.8H2O in 1.6 l. H2O refluxed 36 h., filtered, concentrated to half-volume, and extracted continuously with Et2O yielded 127 g. I, b1.5 115-16°, m. 38-40°. VIII (10 g.), 20 cc. concentrated HCl, and 10 cc. AcOH refluxed 10 h., evaporated in vacuo, the viscous residue dissolved in saturated aqueous Na2CO3, and the solution extracted continuously with Et2O yielded 5.3 g. N-Ac derivative of I, m. 22-3° (dioxane). I (3 g.) in 150 cc. MeOH saturated at 0° with HCl, filtered, the residue in 100 cc. MeOH treated during 5 min. with dry HCl and then with stirring at 0° with 10% excess iso-AmONO, and the mixture diluted after 1.5 h. with 250 cc. Et2O gave III, decomposed at 180-5°. I (3 g.) in 150 cc. 85% H3PO4 treated with stirring at 0° slowly with concentrated aqueous NaNO2 and then with saturated aqueous NaOAc yielded 3(5),3′(5′)-diazoaminopyrazole, C6H7N7, yellowish crystals, decomposed at 186-7.5° (MeOH-NH4OH). III (0.7 g.) in CHCl3 adjusted at 0° with 50 cc. saturated aqueous Na2CO3 to pH 8, the aqueous phase extracted with CHCl3, and the CHCl3 solution evaporated cold in vacuo gave long needles of IV, which decomposed rapidly at room temperature with the formation of brown insoluble products. III (1 g.) in 150 cc. CHCl3 treated at -10° with 3 cc. Et3N gave a solution of IV. IV in solution treated carefully with CHCl3 saturated with HCl yielded III. III (from 4 g. I) in a little H2O treated at 0° with 7 g. NaI in 150 cc. H2O, the mixture heated 0.5 h. on the water bath, evaporated in vacuo, and the residue extracted with Et2O yielded 6% V, needles, m. 72-3° (H2O). IV (from 1.2 g. I) in CHCl3 treated at 0° with 4 g. 68% HI, the mixture warmed to room temperature, and worked up in the usual manner gave V. A solution of III (from 3.5 g. I added dropwise at 0° to 12.5 g. VI in 10% aqueous NaOH) gave 2.8 g. coupling product, C13H8N4, yellow needles from much H2O, yellow-red platelets from aqueous MeOH, m. 192-4°; the filtrate gave addnl. product. IV solution from III in CHCl3 treated with concentrated VI in CHCl3 and evaporated also gave the coupling product, yellow-red leaflets, m. 192-4° (aqueous MeOH). The UV and IR absorption spectra of III and IV were recorded.

Chemische Berichte published new progress about 3553-12-6. 3553-12-6 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Amine,Amide, name is 3-Acetamidopyrazole, and the molecular formula is C5H7N3O, Application In Synthesis of 3553-12-6.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Maquestiau, A.’s team published research in Bulletin des Societes Chimiques Belges in 82 | CAS: 14580-22-4

Bulletin des Societes Chimiques Belges published new progress about 14580-22-4. 14580-22-4 belongs to pyrazoles-derivatives, auxiliary class Organic Pigment, name is 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, and the molecular formula is C10H9ClN2O, Related Products of pyrazoles-derivatives.

Maquestiau, A. published the artcileTautomerism in the pyrazolinone series. II. Solvent influence on the prototropic equilibrium of N1 substituted pyrazolin-5-ones, Related Products of pyrazoles-derivatives, the publication is Bulletin des Societes Chimiques Belges (1973), 82(3-4), 215-31, database is CAplus.

The solvent effect on the tautomerism of N-1 substituted pyrazolin-5-ones was determined by ir. The % keto form (I) was larger than the % enol form in nonpolar solvents; the % keto form decreased in aprotic solvents with their increasing basicity. In aprotic solvents, the concentration of the NH form (II) was related to the solvent acidity.

Bulletin des Societes Chimiques Belges published new progress about 14580-22-4. 14580-22-4 belongs to pyrazoles-derivatives, auxiliary class Organic Pigment, name is 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, and the molecular formula is C10H9ClN2O, Related Products of pyrazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Liang, Jun’s team published research in Journal of Medicinal Chemistry in 56 | CAS: 763120-58-7

Journal of Medicinal Chemistry published new progress about 763120-58-7. 763120-58-7 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Boronic Acids,Boronic acid and ester, name is 1H-Pyrazole-4-boronic acid, and the molecular formula is C3H5BN2O2, Synthetic Route of 763120-58-7.

Liang, Jun published the artcileLead Optimization of a 4-Aminopyridine Benzamide Scaffold To Identify Potent, Selective, and Orally Bioavailable TYK2 Inhibitors, Synthetic Route of 763120-58-7, the publication is Journal of Medicinal Chemistry (2013), 56(11), 4521-4536, database is CAplus and MEDLINE.

Herein the authors report the authors’ lead optimization effort to identify potent, selective, and orally bioavailable TYK2 inhibitors, starting with lead mol. 2,6-dichloro-N-(2-(cyclopropanecarboxamido)pyridin-4-yl)benzamide. The authors used structure-based design to discover 2,6-dichloro-4-cyanophenyl and (1R,2R)-2-fluorocyclopropylamide modifications, each of which exhibited improved TYK2 potency and JAK1 and JAK2 selectivity relative to 2,6-dichloro-N-(2-(cyclopropanecarboxamido)pyridin-4-yl)benzamide. Further optimization eventually led to 2-Chloro-4-cyano-6-fluoro-N-(2-((1R,2R)-2-fluorocyclopropanecarboxamido)pyridin-4-yl)benzamide that showed good TYK2 enzyme and interleukin-12 (IL-12) cell potency, as well as acceptable cellular JAK1 and JAK2 selectivity and excellent oral exposure in mice. When tested in a mouse IL-12 PK/PD model, 2-Chloro-4-cyano-6-fluoro-N-(2-((1R,2R)-2-ffluorocyclopropanecarboxamido)pyridin-4-yl)benzamide showed statistically significant knockdown of cytokine interferon-γ (IFNγ), suggesting that selective inhibition of TYK2 kinase activity might be sufficient to block the IL-12 pathway in vivo.

Journal of Medicinal Chemistry published new progress about 763120-58-7. 763120-58-7 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Boronic Acids,Boronic acid and ester, name is 1H-Pyrazole-4-boronic acid, and the molecular formula is C3H5BN2O2, Synthetic Route of 763120-58-7.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Popov, Mark S.’s team published research in Molecules in 26 | CAS: 930-36-9

Molecules published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, HPLC of Formula: 930-36-9.

Popov, Mark S. published the artcileGas Chromatography-Mass Spectrometry Quantification of 1,1-Dimethylhydrazine Transformation Products in Aqueous Solutions: Accelerated Water Sample Preparation, HPLC of Formula: 930-36-9, the publication is Molecules (2021), 26(19), 5743, database is CAplus and MEDLINE.

The use of highly toxic rocket fuel based on 1,1-dimethylhydrazine (UDMH) in many types of carrier rockets poses a threat to environment and human health associated with an ingress of UDMH into wastewater and natural reservoirs and its transformation with the formation of numerous toxic nitrogen-containing products. Their GC-MS quantification in aqueous samples requires matrix change and is challenging due to high polarity of analytes. To overcome this problem, accelerated water sample preparation (AWASP) based on the complete removal of water with anhydrous sodium sulfate and transferring analytes into dichloromethane was used. Twenty-nine UDMH transformation products including both the acyclic and heterocyclic compounds of various classes were chosen as target analytes. AWASP ensured attaining near quant. extraction of 23 compounds with sample preparation procedure duration of no more than 5 min. Combination of AWASP with gas chromatog.-mass spectrometry and using pyridine-d5 as an internal standard allowed for developing the rapid, simple, and low-cost method for simultaneous quantification of UDMH transformation products with detection limits of 1-5 μg L-1 and linear concentration range covering 4 orders of magnitude. The method has been validated and successfully tested in the anal. of aqueous solutions of rocket fuel subjected to oxidation with atm. oxygen, as well as pyrolytic gasification in supercritical water modeling wastewater from carrier rockets launch sites.

Molecules published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, HPLC of Formula: 930-36-9.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Lemurell, Malin’s team published research in Journal of Medicinal Chemistry in 62 | CAS: 724710-02-5

Journal of Medicinal Chemistry published new progress about 724710-02-5. 724710-02-5 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Pyrazole,Boronic Acids,Boronic acid and ester, name is (1H-Pyrazol-5-yl)boronic acid, and the molecular formula is C3H5BN2O2, HPLC of Formula: 724710-02-5.

Lemurell, Malin published the artcileNovel Chemical Series of 5-Lipoxygenase-Activating Protein Inhibitors for Treatment of Coronary Artery Disease, HPLC of Formula: 724710-02-5, the publication is Journal of Medicinal Chemistry (2019), 62(9), 4325-4349, database is CAplus and MEDLINE.

5-Lipoxygenase (5-LO)-activating protein (FLAP) inhibitors have proven to attenuate 5-LO pathway activity and leukotriene production in human clin. trials. However, previous clin. candidates have been discontinued and the link between FLAP inhibition and outcome in inflammatory diseases remains to be established. We here describe a novel series of FLAP inhibitors identified from a screen of 10k compounds and the medicinal chem. strategies undertaken to progress this series. Compound I showed good overall properties and a pIC50 hWBfree of 8.1 and an lipophilic ligand efficiency of 5.2. Target engagement for I was established in dogs using ex vivo measurement of leukotriene B4 (LTB4) levels in blood with good correlation to in vitro potency. A predicted human dose of 280 mg b.i.d. suggests a wide margin to any identified in vitro off-target effects and sufficient exposure to achieve an 80% reduction of LTB4 levels in humans. Compound I is progressed to preclin. in vivo safety studies.

Journal of Medicinal Chemistry published new progress about 724710-02-5. 724710-02-5 belongs to pyrazoles-derivatives, auxiliary class Pyrazole,Boronic acid and ester,Pyrazole,Boronic Acids,Boronic acid and ester, name is (1H-Pyrazol-5-yl)boronic acid, and the molecular formula is C3H5BN2O2, HPLC of Formula: 724710-02-5.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Asegbeloyin, Jonnie N.’s team published research in Bioinorganic Chemistry and Applications in | CAS: 4551-69-3

Bioinorganic Chemistry and Applications published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one.

Asegbeloyin, Jonnie N. published the artcileSynthesis, characterization, and biological activity of N’-[(Z)-(3-methyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)(phenyl)methyl]benzohydrazide and its Co(II), Ni(II), and Cu(II) complexes, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, the publication is Bioinorganic Chemistry and Applications (2014), 718175/1-718175/11, 12 pp., database is CAplus and MEDLINE.

Reaction of 1-phenyl-3-methyl-4-benzoyl-pyrazol-5-one and benzoyl hydrazide in refluxing EtOH gave N’-[(Z)-(3-methyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)(phenyl)methyl]benzohydrazide (HL1), which was characterized by NMR spectroscopy and single-crystal x-ray structure study. X-ray diffraction analyses of the crystals revealed a nonplanar mol., existing in the keto-amine form, with intermol. H bonding forming a seven-membered ring system. The reaction of HL1 with Co(II), Ni(II), and Cu(II) halides gave the corresponding complexes, which were characterized by elemental anal., molar conductance, magnetic measurements, and IR and electronic spectral studies. The compounds were screened for their in vitro cytotoxic activity against HL-60 human promyelocytic leukemia cells and antimicrobial activity against some bacteria and yeasts. The compounds are potent against HL-60 cells with the IC50 value â‰? μM, while some of the compounds were active against few studied Gram-pos. bacteria.

Bioinorganic Chemistry and Applications published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Recommanded Product: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics

Hara, Naofumi’s team published research in Chemical Communications (Cambridge, United Kingdom) in 57 | CAS: 930-36-9

Chemical Communications (Cambridge, United Kingdom) published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, Product Details of C4H6N2.

Hara, Naofumi published the artcileC2-Selective silylation of pyridines by a rhodium-aluminum complex, Product Details of C4H6N2, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(48), 5957-5960, database is CAplus and MEDLINE.

We have developed a C2-selective dehydrogenative mono-silylation of a variety of pyridines using a Rh-Al complex [(R2PCH2N-1,2-C6H4NMe-1,2-C6H4NCH2PR2)AlClRhCl(L)]n (R = Ph, iPr; n = 1, L = nbd; n = 2, L void). Both the site- and mono-selectivity are controlled via the pyridine coordination to the Lewis-acidic Al center prior to the activation of the pyridine C(2)-H bond at the proximal Rh center. A reaction mechanism is proposed based on several mechanistic studies, including the isolation of a (2-pyridyl)silylrhodium intermediate.

Chemical Communications (Cambridge, United Kingdom) published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, Product Details of C4H6N2.

Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics