Tag: M.W=150-200

Yan, Fangyou published the artcilePredicting Toxicity of Ionic Liquids in Acetylcholinesterase Enzyme by the Quantitative Structure-Activity Relationship Method Using Topological Indexes, Safety of 1-(Cyanomethyl)pyridin-1-ium chloride, the publication is Journal of Chemical & Engineering Data (2012), 57(8), 2252-2257, database is CAplus.

A new topol. index (TI) was proposed based on atom characters (e.g., atom radius, atom electronegativity, etc.) and atom positions in the hydrogen-suppressed mol. structure in our previous work. In this work, the TI was used for predicting the toxicity of ILs in acetylcholin esterase (log EC₅₀ AChE) by the multiple linear regression (MLR) method. For ILs composed entirely of cations and anions, the TIs are calculated from cations and anions, resp. The 221 ILs used in the MLR model are based on imidazolium (Im), pyridinium (Pyi), pyrrolidinium (Pyo), ammonium (Am), phosphonium (Ph), quinolinium (Qu), piperidinium (Pi), and morpholinium (Mo). The regression coefficient (R²) and the overall average absolute error (AAE) are 0.877 and 0.153, resp.

Journal of Chemical & Engineering Data published new progress about 17281-59-3. 17281-59-3 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitrile,Salt, name is 1-(Cyanomethyl)pyridin-1-ium chloride, and the molecular formula is C20H19NO4, Safety of 1-(Cyanomethyl)pyridin-1-ium chloride.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Lan, Lixin published the artcileUltrasonic-assisted synthesis of 2-sulfonyl nitrogen heterocyclic compounds, Recommanded Product: Pyridine-3-sulfonic acid, the publication is Youji Huaxue (2018), 38(2), 492-497, database is CAplus.

A facile and convenient ultrasonic-assisted method for the synthesis of 2-sulfonyl nitrogen heterocyclics has been developed. Using bromo-tris-pyrrolidino-phosphonium hexafluorophosphate (PyBroP) as catalyst, the reactions were carried out under ultrasound irradiation condition at room temperature for 1.0 h, and the 2-sulfonyl nitrogen heterocyclics were obtained in good yields with nitrogen heterocyclic N-oxides and sulfinic acid as raw materials. The reaction has the advantages of good substrate suitability, short reaction times and high yields, which provides a efficient approach for the synthesis of 2-sulfonyl nitrogen heterocyclics and their derivatives

Youji Huaxue published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Recommanded Product: Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Wang, Yue published the artcileA Keggin-type polyoxometalate-based metal-organic complex as a highly efficient heterogeneous catalyst for the selective oxidation of alkylbenzenes, HPLC of Formula: 91-02-1, the publication is Dalton Transactions (2022), 51(6), 2331-2337, database is CAplus and MEDLINE.

The direct oxidation of C-H bonds in organic materials into necessary oxygen containing compounds under mild conditions has attracted increasing attention. A Keggin type polyoxometalate based metal organic complex (MOC), [Cu^II4Cu^I(H₂trz)₄(C₂O₄)(H₂O)₄(H₃PW_11.18Cu^II0.82O₄₀)]·8H₂O (1) (H₃trz = 1,2,4-triazole), was designed and synthesized under hydrothermal conditions, and was structurally characterized by single crystal X-ray diffraction, PXRD, IR spectroscopy, TGA, and XPS. Complex 1 is a 3D 4,6,8-connected architecture derived from [Cu₅(H₂trz)₄(C₂O₄)₂(H₂O)₂]n units and [PW_11.18Cu_0.82O₄₀]^6- anions, which can catalytically oxidize various types of alkylbenzenes. Gas chromatog. anal. showed that complex 1 as a heterogeneous catalyst could effectively catalyze the oxidation of diphenylmethane with 93% conversion and 99% selectivity within 6 h. In addition, the conversion for the catalytic oxidation of ethylbenzene was 96% with 99% selectivity. Compared with some reported catalysts, complex 1 exhibited a better catalytic effect and lower reaction time. Meanwhile, the catalytic oxidation of other benzyl derivatives with complex 1 was also investigated, which indicated that complex 1 possessed excellent catalytic performance.

Dalton Transactions published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C14H20BClO2, HPLC of Formula: 91-02-1.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Xu, Baijie published the artcileA Copper-Containing Polyoxometalate-Based Metal-Organic Framework as an Efficient Catalyst for Selective Catalytic Oxidation of Alkylbenzenes, HPLC of Formula: 91-02-1, the publication is Inorganic Chemistry (2021), 60(7), 4792-4799, database is CAplus and MEDLINE.

A copper-containing polyoxometalate-based metal-organic framework (POMOF), Cu^I12Cl₂(trz)₈[HPW₁₂O₄₀] (HENU-7, HENU = Henan University; trz = 1,2,4-triazole), has been successfully synthesized and well-characterized. In addition, the excellent catalytic ability of HENU-7 has been proved by the selective oxidation of diphenylmethane. Under the optimal conditions, the diphenylmethane conversion obtained over HENU-7 is 96%, while the selectivity to benzophenone is 99%, which outperforms most noble-metal-free POM-based catalysts. Moreover, HENU-7 is stable to reuse for five runs without an obvious loss in activity and also can catalyze the oxidation of different benzylic C-H with satisfactory conversions and selectivities, which implied the significant catalytic activity and recyclability.

Inorganic Chemistry published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C44H28ClFeN4, HPLC of Formula: 91-02-1.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Yang, Fang-zu published the artcileA study on the effect of bath composition on the internal stress of a palladium electrodeposit, Recommanded Product: Pyridine-3-sulfonic acid, the publication is Transactions of the Institute of Metal Finishing (1998), 76(6), 238-240, database is CAplus.

The effects of bath composition on the internal stress of palladium electrodeposits are studied in neutral media with Pd(NH₃)₂Cl₂, K₃C₆H₅O₇, (NH₄)₂C₂O₄ and the additives of the mixture of the synthesized products of nicotinic acid and nicotiamide (NANA), pyridine-3-sulfonic acid (PSA), α-furan formic acid (FF) and cetyl tri-Me ammonium bromide (CTMAB). The internal stress of electrodeposits is quite changeable at the beginning of electrodeposition, later becoming stable gradually. Deposits obtained from pulse electrodeposition have lower stress than that from d.c. After electrodeposition, all the deposits keep the tensile stress which increases with time.

Transactions of the Institute of Metal Finishing published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C8H11NO, Recommanded Product: Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Jin, Hongwei published the artcileCopper-Catalyzed One-Pot Synthesis of Substituted Benzimidazoles, Recommanded Product: 2-Bromopyridin-3-amine, the publication is Advanced Synthesis & Catalysis (2010), 352(2+3), 347-350, database is CAplus.

A copper-catalyzed one-pot synthesis of functionalized benzimidazoles has been developed. The procedure combines the copper-catalyzed three-component cascade reaction of sulfonyl azides R¹SO₂N₃ (R¹ = Ph, 4-MeC₆H₄, etc.), alkynes R²CCH (R² = Ph, 4-MeC₆H₄, etc.) and 2-X-4-R³-aniline (R³ = H, Me, Cl; X = Br, I) and the copper-catalyzed intramol. N-arylation of sulfonamides in one sequence, which afforded the products I in moderate to good yields.

Advanced Synthesis & Catalysis published new progress about 39856-58-1. 39856-58-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Bromide,Amine, name is 2-Bromopyridin-3-amine, and the molecular formula is C5H5BrN2, Recommanded Product: 2-Bromopyridin-3-amine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Xie, Pan published the artcilePhoto-induced oxidative cleavage of C-C double bonds for the synthesis of biaryl methanone via CeCl₃ catalysis, Recommanded Product: Phenyl(pyridin-2-yl)methanone, the publication is Organic & Biomolecular Chemistry (2021), 19(31), 6781-6785, database is CAplus and MEDLINE.

A Ce-catalyzed strategy is developed to produce biaryl methanones via photooxidative cleavage of C-C double bonds at room temperature This reaction is performed under air and demonstrates high activity as well as functional group tolerance. A synergistic Ce/ROH catalytic mechanism is also proposed based on the exptl. observations. This protocol should be the first successful Ce-catalyzed photooxidation reaction of olefins with air as the oxidant, which would provide inspiration for the development of novel Ce-catalyzed photochem. synthesis processes.

Organic & Biomolecular Chemistry published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C8H7ClO3, Recommanded Product: Phenyl(pyridin-2-yl)methanone.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Kawada, Takuma published the artcileAsymmetric Transfer Hydrogenative Amination of Benzylic Ketones Catalyzed by Cp*Ir(III) Complexes Bearing a Chiral N-(2-Picolyl)sulfonamidato Ligand, Category: pyridine-derivatives, the publication is Journal of Organic Chemistry (2022), 87(13), 8458-8468, database is CAplus and MEDLINE.

A convenient asym. reductive amination of benzylic ketones (α-arylated ketones) catalyzed by newly designed Cp*Ir complexes bearing a chiral N-(2-picolyl)sulfonamidato ligand was developed. Using readily available β-amino alcs. as chiral aminating agents, a range of benzo-fused and acyclic ketones were successfully reduced with formic acid in methanol at 40°C to afford amines with favorable chemo- and diastereoselectivities. The amino alc.-derived chiral auxiliary was easily removed by mild periodic oxidants, leading to optically active primary β-arylamines without erosion of the optical purity (up to 97% ee). The excellent catalytic performance was retained even upon lowering the amount of catalyst to a substrate/catalyst (S/C) ratio of 20,000, and the amination could be performed on a large scale exceeding 100 g. The precise hydride transfer to iminium species generated from the ketonic substrate and the chiral amine counterpart was suggested by the mechanistic studies on stoichiometric reactions of isolable hydridoiridium complexes and model intermediates such as N,O-acetal, enamine, and iminium compounds

Journal of Organic Chemistry published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C12H9NO, Category: pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Xu, Chen published the artcileSynthesis and Structural Characterization of Palladacycles with Polydentate Ligands by a Stepwise Coupling Route – Palladacycles Containing Halides as Efficient Catalysts and Substrates, Related Products of pyridine-derivatives, the publication is European Journal of Inorganic Chemistry (2011), 2011(31), 4878-4888, database is CAplus.

A series of ferrocenyl palladacycles with polydentate ligands were conveniently prepared by the Suzuki coupling reactions of a halide-containing ferrocenyl palladacycle [PdCl({(η⁵-C₅H₅)}Fe{(η⁵-C₅H₃)N₂C₄H₂Cl})(PPh₃)] (1) and arylboronic acids without addnl. palladium catalysis. In the absence of addnl. base, amination also occurred in high yield. This new protocol was successfully applied to the Suzuki coupling reactions of the analogous halide-containing palladacycle [PdCl({(η⁵-C₅H₅)}Fe{(η⁵-C₅H₃)NC₅H₃Br})(PPh₃)] (15) and Buchwald-Hartwig amination of the analogous complex [PdCl({(η⁵-C₅H₅)}Fe{(η⁵-C₅H₃)NC₅H₃Br})(DCPAB)] (32), where DCPAB = 2-dicyclohexylphosphanyl-2′-(N,N-dimethylamino)biphenyl. The halide-containing palladacycles act as efficient catalysts and substrates in the coupling reactions. 37 New examples have been fully characterized by elemental anal., IR and ¹H NMR spectroscopy, and ESI-MS. Addnl., the mol. structures of eight compounds were determined by single-crystal x-ray diffraction, and many types of intermol. C-H···Cl (O, N, π) interactions and π-π interactions were found in the crystal structures of these palladacycles.

European Journal of Inorganic Chemistry published new progress about 612845-44-0. 612845-44-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Boronic acid and ester,Ether,Boronic Acids,Boronic acid and ester, name is (6-Ethoxypyridin-3-yl)boronic acid, and the molecular formula is C20H19NO4, Related Products of pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Cappello, Daniela published the artcileA Boron Difluoride Hydrazone (BODIHY) Polymer Exhibits Aggregation-Induced Emission, COA of Formula: C12H9NO, the publication is Macromolecular Rapid Communications (2021), 42(8), 2000553, database is CAplus and MEDLINE.

Polymers that exhibit aggregation-induced emission (AIE) find use, for example, as cell-imaging agents and as fluorometric sensors due to their unique optical properties. However, the structural diversity of AIE-active polymers has not necessarily advanced at the same rate as their applications. In this work, ring-opening metathesis polymerization is used to synthesize the first example of a polymer (M_n = 61,600 g mol^-1, Dj = 1.32) containing boron difluoride hydrazone (BODIHY) heterocycles in its repeating unit. The BODIHY monomer and polymer described absorb and emit in the visible region in solution (λ_abs = 428 and 429 nm, λ_em = 528 and 526 nm) and as thin films (λ_abs = 443 and 440 nm, λ_em = 535 and 534 nm). Monomer (Φ_Film = 10%) and polymer (Φ_Film = 6%) exhibit enhanced emission as thin films compared to solution (Φ_Soln â‰?1%) as well as AIE upon the addition of water to DMF solutions as a result of restriction of intramol. motion. Enhancement factors for the monomer and polymer are determined to be 58 and 15, resp. The title BODIHY polymer exhibited an earlier onset of AIE and enhanced sensitivity to solution viscosity when compared to the parent monomer.

Macromolecular Rapid Communications published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C12H9NO, COA of Formula: C12H9NO.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem