Category: pyrazoles-derivatives

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3-Hydroxy-3-phenylpropanenitrile, is researched, Molecular C9H9NO, CAS is 17190-29-3, about Regioselective nucleophilic opening of epoxides and aziridines under neutral conditions in the presence of β-cyclodextrin in water, the main research direction is epoxide regioselective nucleophilic opening sodium cyanide cyclodextrin catalyst water; aziridine regioselective nucleophilic opening cyclodextrin catalyst water; hydroxy nitrile preparation; amino alc preparation.Quality Control of 3-Hydroxy-3-phenylpropanenitrile.

A variety of β-hydroxy nitriles and β-amino alcs. were synthesized by the regioselective ring opening of epoxides and aziridines under neutral and aqueous conditions in the presence of β-cyclodextrin in good yields.

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

Kumagai, Naoya; Matsunaga, Shigeki; Shibasaki, Masakatsu published the article 《Cooperative catalysis of a cationic ruthenium complex, amine base, and Na salt: catalytic activation of acetonitrile as a nucleophile》. Keywords: aldehyde acetonitrile addition ruthenium DBU sodium fluorophosphate; aryl hydroxypropanenitrile preparation; aminopropanenitrile preparation; ruthenium DBU sodium fluorophosphate addition catalyst.They researched the compound: 3-Hydroxy-3-phenylpropanenitrile( cas:17190-29-3 ).Formula: C9H9NO. 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:17190-29-3) here.

Cooperative catalysis of a cationic Ru complex, DBU, and NaPF6 is described. An exquisite combination of the catalytic triad enabled catalytic activation of acetonitrile as a nucleophile under mild amine-basic conditions. Addition of in situ-generated, Ru-bound, metalated nitrile to aldehydes and imines proceeded smoothly with catalytic amounts of Ru complex and DBU in the presence of a catalytic amount of NaPF6. Preliminary mechanistic studies suggested a role for each of the three catalytic components.

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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 Polyvinylidene fluoride nanocomposite super hydrophilic membrane integrated with Polyaniline-Graphene oxide nano fillers for treatment of textile effluents, published in 2021-02-05, 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, Product Details of 25956-17-6.

Water pollution from the fashion industries containing dyes has become a major source of water pollution. These anthropogenic contaminated waters directly enter irrigation and drinking water systems, causing irreversible environmental damage to human health. Nanomembrane technol. has attracted extensive attention to remove these toxic chems. but new approaches are still required for improving removal efficiency and control the channel size. The work deals with the fabrication of a novel hybrid polyvinylidene fluoride (PVDF)-polyaniline (PANI) membrane with graphene oxide (GO). Incorporation of PANI-GO as a nanofiller has significantly improved antifouling properties and a solvent content of the fabricated membrane. Besides, pure water flux also increases from 112 to 454 L m-2 h-1 indicating the hydrophilic nature of the nanocomposite membrane. Among various compositions, the nanocomposites membrane with 0.1%w/v GO demonstrated a maximum of 98% dye rejection at 0.1 MPa operating pressure. After multiple testing of the membrane, the flux recovery ratio reached about 94% and dyes rejection improved with the addition of PANI-GO. The removal efficiency of the composite membrane for Allura red is 98% and for methyl orange is 95%. Based on the above results the PVDF/PANI/GO membranes are recommended for practical use in wastewater treatment, particularly for anionic dyes removal from textile effluents.

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

Category: pyrazoles-derivatives. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. 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 Food colors caught red-handed. Author is Kulkarni, Anmol; Jung, Steffen.

The etiol. of inflammatory bowel disorders (IBDs) involves an interplay of genetic and environmental factors. While human genomic analyses and preclin. animal models have revealed critical IBD risk genes and circuits, environmental effects remain poorly defined. In this issue, He et al. (2021) begin to fill this gap by reporting a striking potential of widely used food colorants to cause IBD-like colitis in mice.

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Reference:
Pyrazole – Wikipedia,
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 Nickel-catalyzed Negishi coupling of cyclobutanone oxime esters with aryl zinc reagents, published in 2020, which mentions a compound: 52287-51-1, mainly applied to alkyl nitrile preparation; cyclobutanone oxime ester aryl zinc Negishi coupling nickel catalyst, Computed Properties of C8H7BrO2.

A nickel-catalyzed Negishi coupling of cyclobutanone oxime esters e.g., cyclobutanone O-(4-(trifluoromethyl)benzoyl)oxime with aryl zinc reagents RZnR (R = Ph, 4-methoxyphenyl, 2H-1,3-benzodioxol-5-yl, etc.) has been developed, in which nickel serves both as an initiator for imine radicals and a catalyst for the coupling of aryl zinc reagents with oxime esters. The protocol can avoid the use of poisonous cyanide and has broad substrate scope as well as good functional group compatibility. Therefore, this method provides an attractive strategy for the synthesis of valuable nitriles RCH(R1)C(R2)(R3)CH2CN (R1 = H, Me, Bn, pentyl, but-3-en-1-yl, prop-2-en-1-yl; R2 = H, Me; R3 = H, Ph, Bn, naphthalen-2-yl, etc.; R2R3 = -(CH2)10-) and trans-2-(2-(4-methoxyphenyl)cyclopent-3-en-1-yl)acetonitrile, etc. Preliminary mechanistic studies indicate that a radical pathway is involved in the product formation.

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

Formula: C8H7BrO2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Ortho-directed lithiation of 3,4-(alkylenedioxy)halobenzenes with LDA and LiTMP. The first ortho lithiation of an iodobenzene. Author is Mattson, Ronald J.; Sloan, Charles P.; Lockhart, Christopher C.; Catt, John D.; Gao, Qi; Huang, Stella.

The halo(alkylenedioxy)benzenes I (R = Br, Cl, iodo; R1 = H; X = CH2, CH2CH2, CMe2) underwent rapid regioselective ortho deprotonation upon treatment with LDA or Li-TMP and subsequent reaction with electrophiles, e.g., DMF and Me3SiCl , to give benzene derivatives, e.g., I (R1 = CHO, Me3Si; X = CH2, CH2CH2, CMe2), in 57-94% yields. The mol. structures of I (R , R1, X = Br, CHO, CH2; iodo, CHO, CH2) were confirmed by x-ray crystal structure anal.

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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: 17190-29-3, is researched, SMILESS is N#CCC(O)C1=CC=CC=C1, Molecular C9H9NOJournal, Article, Research Support, Non-U.S. Gov’t, Chemistry – A European Journal called Direct Catalytic Addition of Alkylnitriles to Aldehydes by Transition-Metal/NHC Complexes, Author is Sureshkumar, Devarajulu; Ganesh, Venkataraman; Kumagai, Naoya; Shibasaki, Masakatsu, the main research direction is beta hydroxynitrile enantioselective diastereoselective preparation; alkylnitrile aldehyde rhodium heterocyclic carbene catalyst addition reaction; N-heterocyclic carbenes; alkylnitriles; asymmetric catalysis; cooperative catalysis; rhodium.Recommanded Product: 17190-29-3.

Direct catalytic addition of alkylnitriles to aldehydes allowed for an atom-economical access to β-hydroxynitriles under proton transfer conditions. Direct use of alkylnitriles as pronucleophiles was hampered due to their low acidity resulting in an inability to generate α-cyano carbanions in a catalytic manner. A transition metal/N-heterocyclic carbene (NHC) complex prepared from [{Rh(OMe)(cod)}2] and an imidazolium-based carbene was identified as an effective catalyst to promote the reaction with as little as 1.25 mol % of catalyst loading. The corresponding Rh complex, derived from chiral triazolium salt, rendered the reaction enantioselective, albeit with moderate enantioselectivity.

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

SDS of cas: 52287-51-1. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Ligand-Promoted Direct C-H Arylation of Simple Arenes: Evidence for a Cooperative Bimetallic Mechanism. Author is Kim, Jaewoon; Hong, Soon Hyeok.

A highly efficient catalyst for the direct C-H arylation of simple arenes was developed on the basis of a palladium-diimine complex. The developed catalyst exhibited the highest turnover number reported to date for the direct arylation of benzene due to increased stability provided by the diimine ligand. The reaction was also performed using only 2-3 equiv of simple arenes. Mechanistic studies in combination with kinetic measurements, isotope effect experiments, synthesis of possible intermediates, and stoichiometric reactions suggested that this reaction follows a cooperative bimetallic mechanism.

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

Duprat de Paule, Sebastien; Jeulin, Severine; Ratovelomanana-Vidal, Virginie; Genet, Jean-Pierre; Champion, Nicolas; Dellis, Philippe published the article 《Synthesis and molecular modeling studies of SYNPHOS, a new, efficient diphosphane ligand for ruthenium-catalyzed asymmetric hydrogenation》. Keywords: phosphine diphosphine atropisomeric ligand Synphos preparation asym hydrogenation; resolution diphosphine ligand asym hydrogenation ketoester ketone unsaturated ester; ruthenium asym hydrogenation Synphos ligand ketoester ketone unsaturated ester; modeling diphosphine ligand ruthenium asym hydrogenation; optimized geometry diphosphine ruthenium palladium complex substrate asym hydrogenation; absolute configuration crystallog Synphos ligand ruthenium asym hydrogenation; crystal structure Synphos chiral diphosphine ruthenium asym hydrogenation catalyst; mol structure Synphos chiral diphosphine ruthenium asym hydrogenation catalyst.They researched the compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine( cas:52287-51-1 ).Computed Properties of C8H7BrO2. 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:52287-51-1) here.

An optically active, atropisomeric diphosphine ligand Synphos was prepared, resolved, characterized, and examined in ruthenium-catalyzed asym. hydrogenation of α- and β-keto esters, functionalized ketones and unsaturated esters. This ligand was compared with other atropisomeric diphosphines (binap and MeO-BIPHEP) with respect to their dihedral angles calculated by mol. modeling and the enantioselectivity of their ruthenium-mediated hydrogenation reactions.

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

Application of 17190-29-3. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 3-Hydroxy-3-phenylpropanenitrile, is researched, Molecular C9H9NO, CAS is 17190-29-3, about Ring opening of epoxides with sodium cyanide catalyzed with Ce(OTf)4. Author is Iranpoor, N.; Shekarriz, M..

Efficient and regioselective conversion of epoxides I [R = Ph, Bu, Me2CHOCH2, H2C:CHCH2OCH2, ClCH2, PhOCH2; R1 = H; RR1 = (CH2)4] to β-hydroxy nitriles II with sodium cyanide in the presence of catalytic amounts of Ce(OTf)4 is described under solvent free conditions.

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