Tag: 100-200

Spectral, thermal and DFT studies of novel nickel(II) complexes of 2-benzoylpyridine-N⁴-methyl-3- thiosemicarbazone: Crystal structure of a square planar azido-nickel(II) complex was written by Jayakumar, K.;Seena, E. B.;Kurup, M. R. Prathapachandra;Kaya, Savas;Serdaroglu, Goncagul;Suresh, E.;Marzouki, Riadh. And the article was included in Journal of Molecular Structure in 2022.Reference of 91-02-1 This article mentions the following:

Novel six Ni(II) complexes of an NNS donor 2-benzoylpyridine-N⁴-methyl-3- thiosemicarbazone(HL) were synthesized and characterized. Various physicochem. techniques are applied for the study of the coordination behavior of the thiosemicarbazone to the nickel center. In all the complexes, thiosemicarbazone is coordinated in the thiolate form. A four coordinated Ni(II) complex [NiLN₃] is crystallized and its mol. and crystal structures are determined by single-crystal x-ray crystallog. Single-crystal XRD reveals that the complex got crystallized in the monoclinic space group P2₁/n and nickel(II) has a square planar environment. Intramol. hydrogen bonding interactions make the complex more rigid and in the crystal lattice, the intermol. hydrogen bonding interactions generate a supramol. 1 D chain. The chem. reactivity behavior of the HL and six Ni(II) complexes was evaluated with the CAM-B3LYP quantum chem. calculations The validity of electronic structure principles like Maximum Hardness, Min. Polarizability, and Min. Electrophilicity Principle in the study is discussed. In the experiment, the researchers used many compounds, for example, Phenyl(pyridin-2-yl)methanone (cas: 91-02-1Reference of 91-02-1).

Phenyl(pyridin-2-yl)methanone (cas: 91-02-1) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Reference of 91-02-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Supramolecular assembly-induced enhanced emission of electrospun nanofibers was written by Cheng, Chih-Chia;Wang, Yeh-Sheng;Chang, Feng-Chih;Lee, Duu-Jong;Yang, Li-Chih;Chen, Jem-Kun. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2015.HPLC of Formula: 1075-62-3 This article mentions the following:

A nucleobase-assembled supramol. nanofiber is capable of forming network-like polymeric clusters through complementary hydrogen-bonding interactions. It behaves as an effective chromophore that greatly enhances the light emission efficiency of fluorescent fibers, reaching up to three times higher efficiency than the control samples. In the experiment, the researchers used many compounds, for example, N-(6-Aminopyridin-2-yl)acetamide (cas: 1075-62-3HPLC of Formula: 1075-62-3).

N-(6-Aminopyridin-2-yl)acetamide (cas: 1075-62-3) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.HPLC of Formula: 1075-62-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain the 2,6-Bis(2,4,6-triisopropylphenyl)phenylimido (NHIPT) Ligand was written by Axtell, Jonathan C.;Schrock, Richard R.;Muller, Peter;Hoveyda, Amir H.. And the article was included in Organometallics in 2015.Related Products of 628-13-7 This article mentions the following:

Mo and W alkylidene complexes that contain the sterically demanding hexaisopropylterphenylimido ligand, N-2,6-(2,4,6-i-Pr₃C₆H₂)₂C₆H₃ (NHIPT), were prepared from Mo(N-t-Bu)₂Cl₂(1,2-dimethoxyethane) or W(N-t-Bu)₂Cl₂(pyridine)₂, employing tert-butylimido ligands as sacrificial proton acceptors. These complexes include M(NHIPT)(CH-t-Bu)Cl₂ (M = Mo, W), Mo(NHIPT)(CH-t-Bu)(pyrrolide)₂, and Mo(NHIPT)(CH-t-Bu)(pyrrolide)(OC₆F₅)(MeCN). In all cases only anti alkylidene isomers are observed in solution, as a consequence of the steric demands of the NHIPT ligand. An x-ray structure of W(NHIPT)(CH-t-Bu)Cl₂ showed it to be a monomer with a disordered alkylidene that is 86% in the anti configuration and 14% in the syn configuration. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Related Products of 628-13-7).

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Related Products of 628-13-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Oxidative valorization of lignin into valuable phenolics: Effect of acidic and basic catalysts and reaction parameters was written by Kumar, Avnish;Biswas, Bijoy;Kaur, Ramandeep;Krishna, Bhavya B.;Thallada, Bhaskar. And the article was included in Bioresource Technology in 2021.SDS of cas: 28020-37-3 This article mentions the following:

The aromatic nature of lignin makes it a good source for the production of numerous platform chems. The valorization of lignin into valuable compounds depends upon the type of bonds and functionality present in lignin. Here, we have studied the depolymerization of rice straw alkali lignin in N₂ and O₂ with acidic (ZSM-5), basic (MgO) catalyst and with their mixtures (1:1, 3:7 and 7:3). The effect of hydrogen peroxide on lignin depolymerization was also examined Maximum yield of bio-oil (50 wt%) was obtained with pure ZSM-5 and 1 mL hydrogen peroxide in nitrogen atm., while maximum conversion (60%) was observed in oxygen environment during the non-catalytic depolymerization of lignin. Bio-oil characterization through GC-MS showed maximum selectivity towards 2-methoxy-4-vinylphenol with 38.5 area% in the bio-oil of ZSM-5-N₂. The bio-oils have also been characterized using ¹H NMR, FT-IR and GC-MS. In the experiment, the researchers used many compounds, for example, 3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3SDS of cas: 28020-37-3).

3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.SDS of cas: 28020-37-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Palladium-Catalyzed Aromatic C-H Bond Nitration Using Removable Directing Groups: Regiospecific Synthesis of Substituted o-Nitrophenols from Related Phenols was written by Zhang, Wei;Zhang, Jian;Ren, Shaobo;Liu, Yunkui. And the article was included in Journal of Organic Chemistry in 2014.Safety of 2-Phenoxypyridine This article mentions the following:

A general and regiospecific transformation of substituted phenols into the related o-nitrophenols has been achieved via a three-step process involving the palladium-catalyzed chelation-assisted ortho-C-H bond nitration as the key step. In the process, 2-pyridinyloxy groups act as removable directing groups for the palladium-catalyzed ortho-nitration of substituted 2-phenoxypridines, and they can be readily removed in the subsequent conversion of the resulting 2-(2-nitrophenoxy)pyridines into 2-nitrophenols. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Safety of 2-Phenoxypyridine).

2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Safety of 2-Phenoxypyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dibenzofuran and dibenzothiophene based palladium(II)/NHC catalysts – synthesis and applications in C-C bond formation was written by Karthik, Shanmugam;Gandhi, Thirumanavelan. And the article was included in New Journal of Chemistry in 2018.Application of 4373-61-9 This article mentions the following:

In the quest for a new ligand system for Pd(II)/NHCs, we developed new dibenzofuran and dibenzothiophene based palladium N-heterocyclic carbene catalysts D1-D6 in good yields. All the catalysts were characterized by multinuclear NMR spectroscopy and HRMS. The X-ray crystal structure of the representative dibenzothiophene based Pd(II)/NHC D4 was determined Among the precatalysts, D1 was shown to be highly effective in the Suzuki-Miyaura cross-coupling reaction of heterocyclic bromides with boronic acids. Besides, D1 affords diverse arylated benzoxazoles via direct C-H bond functionalization with substituted bromo derivatives In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Application of 4373-61-9).

2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Application of 4373-61-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Accelerated decarboxylation of 1,3-dimethylorotic acid in ionic liquid was written by Wong, Freeman M.;Wu, Weiming. And the article was included in Bioorganic Chemistry in 2006.Computed Properties of C7H7NO3 This article mentions the following:

The solvent effect of ionic liquids on the decarboxylation of 1,3-dimethylorotic acid and its analog in ionic was investigated. The rate acceleration observed was proposed to be a result of the stabilization of the zwitterionic intermediates by the charged groups available in these special solvents. In the experiment, the researchers used many compounds, for example, 1-Methyl-6-oxo-1,6-dihydropyridine-2-carboxylic acid (cas: 59864-31-2Computed Properties of C7H7NO3).

1-Methyl-6-oxo-1,6-dihydropyridine-2-carboxylic acid (cas: 59864-31-2) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Computed Properties of C7H7NO3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis, Characterization, and Oxygenation Studies of Carboxylate-Bridged Diiron(II) Complexes with Aromatic Substrates Tethered to Pyridine Ligands and the Formation of a Unique Trinuclear Complex was written by Friedle, Simone;Lippard, Stephen J.. And the article was included in European Journal of Inorganic Chemistry in 2009.Recommanded Product: 4783-68-0 This article mentions the following:

Diiron(II) complexes were synthesized as small mol. mimics of the reduced active sites in the hydroxylase components of bacterial multicomponent monooxygenases (BMMs). Tethered aromatic substrates were introduced as 2-phenoxypyridines, incorporating hydroxy and methoxy functionalities into windmill-type diiron(II) compounds [Fe₂(μ-O₂CAr^R)₂(O₂CAr^R)₂(L)₂] (1–4), where ^–O₂CAr^R is a sterically encumbering carboxylate, 2,6-bis(4-fluorophenyl)-, or 2,6-bis(p-tolyl)benzoate (R = 4-FPh or Tol, resp.). The inability of 1–4 to hydroxylate the aromatic substrates was ascertained. Upon reaction with dioxygen, compounds 2 and 3 (L = 2-(m-MeOPhO)Py, 2-(p-MeOPhO)Py, resp.) decompose by a known bimol. pathway to form mixed-valent diiron(II,III) species at low temperature Use of 2-(pyridin-2-yloxy)phenol as the ligand L resulted in a doubly bridged diiron complex 4 and an unprecedented phenoxide-bridged triiron(II) complex 5 under slightly modified reaction conditions. (© Wiley-VCH Verlag GmbH and Co. KGaA, 69451 Weinheim, Germany, 2009). In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Recommanded Product: 4783-68-0).

2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Recommanded Product: 4783-68-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cobalt-Catalyzed C(sp²)-C(sp³) Suzuki-Miyaura Cross-Coupling Enabled by Well-Defined Precatalysts with L,X-Type Ligands was written by Mills, L. Reginald;Gygi, David;Ludwig, Jacob R.;Simmons, Eric M.;Wisniewski, Steven R.;Kim, Junho;Chirik, Paul J.. And the article was included in ACS Catalysis in 2022.Quality Control of tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate This article mentions the following:

Cobalt(II) halides in combination with phenoxyimine (FI) ligands generated efficient precatalysts in situ for the C(sp²)-C(sp³) Suzuki-Miyaura cross-coupling between alkyl bromides and neopentylglycol (hetero)arylboronic esters. The protocol enabled efficient C-C bond formation with a host of nucleophiles and electrophiles (36 examples, 34-95%) with precatalyst loadings of 5 mol %. Studies with alkyl halide electrophiles that function as radical clocks support the intermediacy of alkyl radicals during the course of the catalytic reaction. The improved performance of the FI-cobalt catalyst was correlated with decreased lifetimes of cage-escaped radicals as compared to those of diamine-type ligands. Studies of the phenoxy(imine)-cobalt coordination chem. validate the L,X interaction leading to the discovery of an optimal, well-defined, air-stable mono-FI-cobalt(II) precatalyst structure. In the experiment, the researchers used many compounds, for example, tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate (cas: 85838-94-4Quality Control of tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate).

tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate (cas: 85838-94-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Quality Control of tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Metal-free isotactic-specific radical polymerization of N-alkylacrylamides with 3,5-dimethylpyridine N-oxide: The effect of the N-substituent and solvent on the isotactic specificity was written by Hirano, Tomohiro;Ishizu, Hideaki;Yamaoka, Ryosuke;Ute, Koichi;Sato, Tsuneyuki. And the article was included in Polymer in 2009.Category: pyridine-derivatives This article mentions the following:

Radical polymerization of N-methylacrylamide (NMAAm), N-n-propylacrylamide, N-isopropylacrylamide (NIPAAm) and N-benzylacrylamide was investigated in CHCl₃, CH₂Cl₂ and CH₃CN, in the presence of 3,5-dimethylpyridine N-oxide (35DMPNO) to examine the effects of the N-substituent and the solvent on the isotactic specificity induced by 35DMPNO. With addition of 35DMPNO to radical polymerization of N-alkylacrylamides in CHCl₃, isotactic specificity was significantly induced in NIPAAm polymerization but only slightly induced in NMAAm polymerization Furthermore, mixed solvents of CH₃CN and halomethanes such as CHCl₃ and CH₂Cl₂ enhanced the ability of 35DMPNO to induce isotactic specificity, and poly(NIPAAm) with 74% meso dyad was obtained. In the experiment, the researchers used many compounds, for example, 3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8Category: pyridine-derivatives).

3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem