Category: pyrazoles-derivatives

Songsichan, T. published the artcileThiocyanation of Pyrazoles Using KSCN/K2S2O8 Combination, COA of Formula: C9H8N2O, the main research area is pyrazole potassium thiocyanate persulfate promoter regioselective thiocyanation green chem; thiocyanatopyrazole preparation.

A convenient and practical thiocyanation of pyrazoles employed a combination of KSCN and K2S2O8 in DMSO (DMSO) was reported. The salient features of the present reaction included environmentally benign reagents, solvents and simple operation. The reaction showed wide functional group tolerance and gave moderate to excellent yields.

SynOpen published new progress about Cyanation, thiocyanation (regioselective). 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, COA of Formula: C9H8N2O.

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

Heinisch, Gottfried published the artcilePyrazoles. 3. N-1 Protected 4-substituted pyrazoles – synthesis and NMR investigation, SDS of cas: 116228-41-2, the main research area is benzylpyrazole preparation carbon NMR; pyrazole benzyl preparation carbon NMR; benzenesulfonylpyrazole preparation carbon NMR.

Pyrazoles I (R1 = cyano, CO2Et, H; R2 = cyano, CO2Et, CO2H, Ph) and II (R1 = Me, NO2; R2 = H, NO2; R3 = Me, NO2) were prepared, and 13C NMR for I and II were obtained. 1-Benzyl-4-pyrazolecarboxyldehyde was treated with CH2(CO2H)2 to give I (R1 = H, R2 = CO2H). 13C NMR were also obtained for III (R4 = PhCO, PhSO2, tosyl; R5 = H, Br, iodo, substituted ethanyl, Me, NO2; R6 = H, Br).

Heterocycles published new progress about NMR (nuclear magnetic resonance). 116228-41-2 belongs to class pyrazoles-derivatives, name is 4-Bromo-1-tosyl-1H-pyrazole, and the molecular formula is C10H9BrN2O2S, SDS of cas: 116228-41-2.

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

Kottha, Thirumalaswamy S. published the artcileA Bioisosteric and Scaffold Hopping Approach for the Design and Synthesis of Double Ring Replacement Analogues of 4-Aryl-4H-Chromenes and in silico Tubulin Inhibitor Studies, Recommanded Product: 5-Phenyl-1H-pyrazol-3(2H)-one, the main research area is aryl chromene bioisosteric analog preparation green chem tubulin inhibitor.

An eco-friendly reaction protocol was developed for the synthesis of heterocyclic hybrid scaffolds through bioisosteric replacement and scaffold hopping approach. The isosteric analogs of salicylaldehyde were designed, identified/synthesized and employed in a three component reaction to afford bioisosteric analogs of 4-aryl-4H-chromenes. Thus central core swapping of benzene-pyridine/pyrazole ring on 4-aryl-4H-chromenes was achieved under simple one-pot reaction conditions and easy work-up. Docking studies show that almost all the compounds possess good binding affinities at the colchicine binding site of tubulin.

ChemistrySelect published new progress about Gastrointestinal absorption. 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, Recommanded Product: 5-Phenyl-1H-pyrazol-3(2H)-one.

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

Modi, C. K. published the artcileSome novel tetradentate Schiff base complexes VO(IV) and Cu(II) involving fluorinated heterocyclic β-diketones and polymethylene diamines of varying chain length, Category: pyrazoles-derivatives, the main research area is preparation fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex; thermal decomposition fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex.

The present article describes the synthesis, spectral, coordination and thermal aspects of N,N’-polymethylene bis(1-phenyl-3-methyl-4-trifluoroacetylimino-2-pyrazoline-5-ol)oxovanadium(IV) or copper(II) Schiff base complexes with alkyl backbones ranging from two to four carbons were characterized on the basis of elemental anal., magnetic moments, molar conductivity measurements, spectra (FTIR, ESR, UV-Visible, MS), VPO and thermal studies. The vapor pressure osmometry (VPO) and mass spectral studies indicate that the complexes are monomeric. An ESR study of all these complexes of VO(IV) and Cu(II) are consistent with the square pyramidal and square planar geometries of these metal ions, resp. In addition, the kinetics and thermodn. parameters for the different thermal decomposition steps of the complexes were studied employing Horowitz-Metzger and Freemen-Carroll methods.

Journal of Thermal Analysis and Calorimetry published new progress about Thermal decomposition. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Category: pyrazoles-derivatives.

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

Aromi, Guillem published the artcileA systematic exploration of nickel-pyrazolinato chemistry with alkali metals: New cages from serendipitous assembly, Synthetic Route of 27412-71-1, the main research area is crystal structure alkali metal nickel pyrazolinolato pivalato multinuclear cluster; alkali metal nickel pyrazolinolato pivalato multinuclear cluster preparation structure; magnetic property nickel pyrazolinolato pivalato multinuclear cluster.

The preparation and properties of fourteen novel paramagnetic [NiIIx] aggregates bridged by pivalate, pyrazolinolate and in most cases hydroxide are reported. A rich structural diversity was achieved by changing the nature of the alkali of the base used during the synthesis, leading to the nuclearities [NiII4NaI4] (2, 3, 4), [NiII5NaI4] (5, 6, 7), [NiII5LiI6] (8), [NiII8MI2] [M = K (9, 10), Rb (11, 12), Cs (13, 14)] and [NiII8] (15). All compounds were characterized by single-crystal x-ray diffraction; however, full crystallog. details are given only for the representative mols. [Ni4Na4(fpo)4(piv)8(Hpiv)8] (2), [Ni5Na4(OH)2(mpo)4(piv)8(Hpiv)2(MeCN)2] (5), [Ni5Li6(OH)2(fpo)2(piv)12(Hpiv)4] (8), [Ni8K2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (9), [Ni8Rb2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (11), [Ni8Cs2(OH)4(ppo)4(piv)10(Hppo)2(Hpiv)2(MeCN)2] (13) and [Ni8(OH)4(mpo)2(PhCH2CO2)10(Hmpo)8] (15), where 5-R-3-pyrazolone [R = Me (Hmpo), Et (Hepo), CF3 (Hfpo), Ph (Hppo)]. Variable-temperature bulk magnetization measurements were performed for each type of complex. The [NiII4NaI4] clusters show intramol. antiferromagnetic coupling and a spin ground state of S = 0. [NiII5NaI4] also display antiferromagnetic superexchange, leading to an S = 1 spin ground state. The mol. with nuclearity [NiII5Li16], in contrast, exhibits ferromagnetic interactions, resulting in the presence of low energy states with high multiplicity, and a spin ground state S > 1. The [NiII8M12] and [NiII8] clusters have the same topol. of spin carriers, which display predominantly antiferromagnetic interactions to yield a diamagnetic ground state. The coupling within these octanuclear NiII clusters is rationalized in terms of the nature of the Ni-O-Ni angles within the core.

Chemistry – A European Journal published new progress about Antiferromagnetic exchange. 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, Synthetic Route of 27412-71-1.

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

Ihara, Hideki published the artcileEasily Attachable and Detachable ortho-Directing Agent for Arylboronic Acids in Ruthenium-Catalyzed Aromatic C-H Silylation, Recommanded Product: 2-(1H-Pyrazol-3-yl)aniline, the main research area is arylboronic ester silylation regioselective pyrazolylaniline ortho directing ruthenium catalyst; silylated boronic ester Suzuki Miyaura coupling arene.

O-C-H silylation of arylboronic acids has been achieved using 2-pyrazol-5-ylaniline as an ortho-directing agent, which was temporarily attached to the boryl group via Ru-catalyzed silylation with hydrosilanes. Condensation products of arylboronic acids with 2-pyrazol-5-ylaniline were prepared in situ and subjected to reaction with triorganosilanes in the presence of RuH2(CO)(PPh3)3 at 135 °C. Regioselective silylation at their ortho-positions proceeded in good yields for phenylboronic acids bearing para-substituents such as chloro, fluoro, Me, methoxy, and trifluoromethyl groups. P-Methoxycarbonyl-substituted phenylboronic acid provided the corresponding silylated product in moderate yield. M-Tolyl- and 2-naphthylboronic acids underwent silylation selectively at the less sterically hindered ortho-positions. The silylated products were utilized in Suzuki-Miyaura coupling, followed either by iodination with ICl or by Tamao oxidation to furnish iodine- or hydroxy-substituted biaryls.

Journal of the American Chemical Society published new progress about Boronic acids Role: RCT (Reactant), RACT (Reactant or Reagent) (arylboronic acids). 111562-32-4 belongs to class pyrazoles-derivatives, name is 2-(1H-Pyrazol-3-yl)aniline, and the molecular formula is C9H9N3, Recommanded Product: 2-(1H-Pyrazol-3-yl)aniline.

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

Fujino, O. published the artcileDetermination of uranium and thorium in apatite minerals by inductively coupled plasma atomic emission spectrometry with solvent extraction separation into diisobutyl ketone, Application In Synthesis of 1691-93-6, the main research area is uranium thorium determination apatite ICP AES.

Determination of the actinide elements (U and Th) in apatite minerals was examined by inductively coupled plasma at. emission spectrometry (ICP-AES) with solvent extraction separation The spectral interference by Ca in the apatite and the neg. interference by the macro-component (Ca phosphate) occurred simultaneously for U and Th. Therefore, after apatite mineral was treated with hot concentrated HNO3, U and Th were separated from Ca phosphate by the solvent extraction method. 1-Phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone (HPMTFP, pKa=2.56) was used as an extraction reagent. Diisobutyl ketone was selected as the extraction organic solvent. U and Th were quant. extracted over pH 2, and could be separated from the apatite composites. The organic phase was injected directly into the ICP-AES spectrometer. The U and Th contents in apatite minerals from Florida, USA, are 103 ± 2.2 and 8.84 ± 0.19 ppm. These results were quite comparable with those measured with ICP-mass spectrometry (ICP-MS).

Analytica Chimica Acta published new progress about Apatite-group minerals Role: AMX (Analytical Matrix), ANST (Analytical Study). 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application In Synthesis of 1691-93-6.

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

Ahmadi, Tahereh published the artcileDomino synthesis of quinoxaline derivatives using SBA-Pr-NH2 as a nanoreactor and their spectrophotometric complexation studies with some metals ions, Computed Properties of 27412-71-1, the main research area is diamine aryl multicomponent spirocyclization ninhydrin malononitrile cyanoacetate active methylene; indenoquinoxaline spirocyclic preparation amino SBA catalyst; quinoxaline complexation transition metal.

Amino-functionalized SBA-15 (SBA-Pr-NH2) with a pore size of 6 nm has been used as a basic nanocatalyst in the domino one-pot synthesis of indenoquinoxaline derivatives via the four-component reaction of ninhydrin, 1,2-diaminoarenes, malonodinitrile or Et cyanoacetate, and active methylene compounds using microwave irradiation The solid basic catalyst plays a significant role in catalysis, enhancing the rate and yield of the reaction, it can be easily handled and removed from the reaction mixture by simple filtration and also reused several times without substantial loss of reactivity. Moreover, the complexation reaction between quinoxaline as a model ligand and some metal ions including Cd2+, Co2+, Cu2+, Fe3+, Hg2+, Ni2+, Pb2+, and Zn2+ ions was examined spectrophotometrically in DMF solution at 25 °C. The formation constants of the resulting complexes were calculated from the computer fitting of the molar absorbance measurements in different mole ratios. The obtained data indicated that the stability constant of the resulting complexes varied in the following order Pb2+> Hg2+> Cd2+> Ni2+> Cu2+> Fe3+> Zn2+> Co2+.

Journal of the Iranian Chemical Society published new progress about Active methylene compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 27412-71-1 belongs to class pyrazoles-derivatives, name is 5-Phenyl-1H-pyrazol-3(2H)-one, and the molecular formula is C9H8N2O, Computed Properties of 27412-71-1.

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

Ghani, Lubna published the artcileLiquid-liquid extraction of Eu(lll) using synergic mixture of 1-phenyl-3-methyl-4-trifluoroacetyl-2-pyrazolin-5-one and crown ethers, Quality Control of 1691-93-6, the main research area is europium HPMTFP crown ether liquid extraction.

Synergic extraction of Eu(III) as representative of rare earth elements was conducted with 0.01 mol dm-3 of trifluoroacetyl-pyrazolin-5-one (HPMTFP) and then with synergic mixture of HPMTFP and crown ethers (benzo-15-crown-5, 18-crown-6, 15-crown-5) in dichloromethane (DCM) from aqueous solution having pH 1.0-3.5. Slope anal. method was used for determining the composition of the synergic adduct i.e. Eu(PMTFP)3 that came out to be Eu(PMTFP)3·2S, where S = neutral oxo-donor and -PMTFP = conjugate base of HPMTFP mol. Selective extraction of Eu(III) was found in the presence of various masking agents like citrate, oxalate, bromide, thiosulfate, chromate ions and of some cations. The accuracy of the developed procedure was checked by analyzing real lake sample (IAEA-SL-3) as a reference material.

SN Applied Sciences published new progress about Actinides Role: TEM (Technical or Engineered Material Use), USES (Uses). 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Quality Control of 1691-93-6.

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

Yamamoto, Takeshi published the artcileRegioselective Synthesis of o-Benzenediboronic Acids via Ir-Catalyzed o-C-H Borylation Directed by a Pyrazolylaniline-Modified Boronyl Group, Application of 2-(1H-Pyrazol-3-yl)aniline, the main research area is benzenediboronic acid preparation; iridium catalyzed carbon hydrogen bond borylation arylboronate pyrazolylaniline directed; arylboronic acid iridium catalyzed borylation.

Ir-catalyzed ortho-directed C-H borylation of pyrazolylaniline (PZA)-modified arylboronic acids with bis(pinacolate)diboron afforded o-benzenediboronic acids in which two boronyl groups are differentially modified by pinacol (PIN) and PZA. By using this borylation after nondirected Ir-catalyzed C-H borylation, o-benzenediboronic acids are conveniently synthesized from unfunctionalized arenes. The differentially modified o-benzenediboronic acids undergo selective oxidation and Suzuki-Miyaura cross-coupling at the PZA-modified boronyl groups, affording o-functionalized arylboronic acids selectively.

Organic Letters published new progress about Arylboronic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 111562-32-4 belongs to class pyrazoles-derivatives, name is 2-(1H-Pyrazol-3-yl)aniline, and the molecular formula is C9H9N3, Application of 2-(1H-Pyrazol-3-yl)aniline.

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