Tag: 0-100

A Green Alternative for the Conversion of Arylboronic Acids/Esters into Phenols Promoted by a Reducing Agent, Sodium Sulfite was written by Castro-Godoy, Willber D.;Schmidt, Luciana C.;Argueello, Juan E.. And the article was included in European Journal of Organic Chemistry in 2019.Name: Pyridin-4-ol This article mentions the following:

Hydroxylation of arylboronic acids and arylboronic esters using sodium sulfite and oxygen as the source of ultimate oxidant proceeds rapidly in water under transition metal-free conditions. This remarkable mild and environmentally benign protocol represents a green alternative to synthesize phenols using inexpensive starting materials in a simple methodol. This new application for sodium sulfite shows a wide tolerance of functional groups, and it is compatible with oxidizable functionalities. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Name: Pyridin-4-ol).

Pyridin-4-ol (cas: 626-64-2) 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). 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.Name: Pyridin-4-ol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Transforming a Fluorochrome to an Efficient Photocatalyst for Oxidative Hydroxylation: A Supramolecular Dimerization Strategy Based on Host-Enhanced Charge Transfer was written by Tang, Bohan;Xu, Weiquan;Xu, Jiang-Fei;Zhang, Xi. And the article was included in Angewandte Chemie, International Edition in 2021.HPLC of Formula: 626-64-2 This article mentions the following:

The development of non-covalent synthetic strategy to fabricate efficient photocatalysts is of great importance in theranostic and organic materials. Herein, a fluorochrome N,N′-dimethyl 2,5-bis(4-pyridinium)thiazolo[5,4-d]thiazole diiodide (MPT) was transformed into an efficient photocatalyst through supramol. dimerization in the cavity of cucurbit[8]uril (CB[8]). The host-enhanced charge transfer interaction within the supramol. dimer 2MPT-CB[8] dramatically promoted intersystem crossing to produce triplet. In addition, the staggered conformation of 2MPT-CB[8] facilitated the energy transfer and electron transfer of the triplet. As a result, 2MPT-CB[8] could serve as a high-efficiency photocatalyst for the oxidative hydroxylation of arylboronic acids. This supramol. dimerization strategy enriches the supramol. engineering of functional π-systems. It is anticipated that this strategy can be extended to fabricate various π-systems with tailor-made functions. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2HPLC of Formula: 626-64-2).

Pyridin-4-ol (cas: 626-64-2) 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). One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.HPLC of Formula: 626-64-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Metabolomic analysis of garlic varieties revealed high cycloalliin content in fresh and black Kinkyou bulbs was written by Fujikawa, Mamoru;Oshima, Hisaka;Matsuoka, Hiromi;Tamura, Hirotoshi. And the article was included in Food Science and Technology Research in 2021.Electric Literature of C5H5NO This article mentions the following:

Garlic has unique aroma and functional components, exhibits anti-platelet aggregation activity, anti-allergic effects of ajoene, and so on, and is indispensable for many tasty dishes. To understand the characteristic metabolites, comprehensive metabolomic anal. of water-soluble components from garlic and black garlic (Kinkyou, Taisou, and Katei lines and Fukuchi White cultivar) was carried out using GC/MS. Kinkyou, which is cultivated as a new line in Kagawa, Japan, was assessed for physiol. important components in comparison with 3 popular garlic types. The loading values of principal component anal. of the characteristics of Kinkyou were mainly attributed to glutamic acid, threonine, cycloalliin, and so on. The amount of cycloalliin as a typical functional component of Kinkyou was determined to be about 327 mg/100 g dry weight by HPLC anal. (2-fold that of the other 3 garlic). Addnl., the amount of cycloalliin in Kinkyou black garlic after processing was increased to 420 mg/100 g dry weight In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Electric Literature of C5H5NO).

Pyridin-4-ol (cas: 626-64-2) 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. Electric Literature of C5H5NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ionic Liquid-Promoted Formylation of N(sp²)-Heteroarenes with CO₂/H₂ over Pd/C was written by Li, Ruipeng;Zhao, Yanfei;Wang, Huan;Li, Dongyang;Wu, Yunyan;Zhang, Hongye;Tang, Minhao;Liu, Zhimin. And the article was included in ACS Sustainable Chemistry & Engineering in 2021.HPLC of Formula: 626-64-2 This article mentions the following:

Ionic liquid (IL)-promoted formylation of N(sp²)-heteroarenes with CO₂ and H₂ to produce formamides over the Pd/C nanocatalyst were studied. It was found that the combination of Pd/C with CO₂-reactive IL, for example, tetrabutylphosphonium succinimide ([P₄₄₄₄][Suc]), achieved the hydrogenation of N(sp₂)-heteroarenes and subsequent formylation with CO₂/H₂. A mechanism investigation indicated that [P₄₄₄₄][Suc] was simultaneously activated CO₂ and N-heteroarenes via by forming carbamate and hydrogen bonds, resp.; meanwhile, it modified the catalytic activity of metal Pd via electron transfer, thus accomplished the production of formamides from N(sp²)-heteroarenes and CO₂/H₂ in combination with Pd/C. This catalytic system was tolerant to a wide substrate scope, afforded the corresponding formamides in moderate to high yields. The high efficacy enabled the designed IL-Pd/C catalytic system of high practical potential. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2HPLC of Formula: 626-64-2).

Pyridin-4-ol (cas: 626-64-2) 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. 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. HPLC of Formula: 626-64-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bioproducts from the pyrolysis of castor seed cake: Basic dye adsorption capacity of biochar and antifungal activity of the aqueous phase was written by Silva, Raquel V. S.;Goncalves, Aline D.;Vinhal, Jonas O.;Cassella, Ricardo J.;Santos, Rodolpho C.;Sasso, Marco Aurelio Dal;Peixoto, Bruno S.;Borba-Santos, Luana P.;Rozental, Sonia;Azevedo, Debora A.;Romeiro, Gilberto A.. And the article was included in Journal of Environmental Chemical Engineering in 2021.Category: pyridine-derivatives This article mentions the following:

Castor seed cake, a solid residue produced after castor oil extraction, has been used as raw material in the pyrolysis process. Crude biochar (40.6% yield) was subjected to four activation methods; the best activating agent for obtaining activated biochar 1 (AB1) with 603.29 m² g^-1 of a specific area comparable to com. active carbon in the methylene blue dye adsorption was concentrated sulfuric acid (H₂SO₄). The adsorption experiments revealed the removal of more than 96% of the dye, kinetic studies showed that a pseudo-second-order (r² ≥ 0.99) model fitted better with evaluated data and that intraparticle diffusion controls the adsorption rate of the dye by AB1. The aqueous phase (19.2% yield) was lyophilized, and the organic extract contains -N (3%), -O (49%), and -NO (48%) content compounds The in vitro antifungal activity against the Cryptococcus species was evaluated, and a low concentration of the aqueous phase induced higher growth inhibition in C. neoformans and C. gattii. Therefore, the use of castor seed cake, an environmental waste, in the preparation of an adsorbent material can be considered a low-cost alternative for water treatment when contaminated with the MB dye. Moreover, the aqueous phase, which is a commonly neglected slow pyrolysis byproduct, could be an efficient option for decontaminating areas with a high fungal load. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Category: pyridine-derivatives).

Pyridin-4-ol (cas: 626-64-2) 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

Optimization of hydrothermal co-liquefaction of seaweeds with lignocellulosic biomass: Merging 2^nd and 3^rd generation feedstocks for enhanced bio-oil production was written by Yuan, Chuan;Wang, Shuang;Cao, Bin;Hu, Yamin;Abomohra, Abd El-Fatah;Wang, Qian;Qian, Lili;Liu, Lu;Liu, Xinlin;He, Zhixia;Sun, Chaoqun;Feng, Yongqiang;Zhang, Bo. And the article was included in Energy (Oxford, United Kingdom) in 2019.Safety of Pyridin-4-ol This article mentions the following:

The present work aimed to explore the optimized conditions of hydrothermal co-liquefaction (co-HTL) of the green seaweed “Enteromorpha clathrata (EN)” and the lignocellulosic agricultural waste “rice husk (RH)”. Sep. hydrothermal liquefaction (HTL) of EN and RH showed bio-oil yields of 26.0% and 45.6%, resp. However, co-HTL under optimized conditions showed significant increase in the bio-oil yield by 71.7% over that of EN, and insignificant difference with that of RH. Nevertheless, the conversion ratio of co-HTL showed 10.6% significant increase over that of RH. GC-MS results showed that main compounds of EN and RH bio-oil lump into the C15-C20 and C5-C12 regions, mainly representing carbon range of diesel and gasoline, resp. Short-chain (C5-C12) and long-chain (C14-C20) compounds in the bio-oil obtained by co-HTL represented 72% and 28%, resp. In addition, the ratio of aromatic compounds in the bio-oil of RH was reduced by 9.3% as a result of co-HTL. In conclusion, results suggested 50% ethanol as a co-solvent, 300°C and 45 min as optimum conditions for co-HTL of EN:RH (1:1 weight/weight). The present study demonstrated an efficient route for co-HTL of 3^rd generation feedstocks with 2^nd generation feedstocks which will have a significant impact on large-scale applications. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Safety of Pyridin-4-ol).

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Safety of Pyridin-4-ol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Simultaneous Long-Persistent Blue Luminescence and High Quantum Yield within 2D Organic-Metal Halide Perovskite Micro/Nanosheets was written by Zhou, Bo;Yan, Dongpeng. And the article was included in Angewandte Chemie, International Edition in 2019.Application of 626-64-2 This article mentions the following:

Mol. solid-state materials with long-lived luminescence (such as thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) systems) are promising for display, sensoring, and bio-imaging applications. However, the design of such materials that exhibit both long luminescent lifetime and high solid-state emissive efficiency remains an open challenge. Two-dimensional (2D) organic-metal halide perovskite materials have a high blue-emitting quantum yield of up to 63.55 % and ultralong TADF lifetime of 103.12 ms at ambient temperature and atm. Our design leverages the combined influences of a 2D space/electronic confinement effect and a modest heavy-atom tuning strategy. Photophys. studies and calculations reveal that the enhanced quantum yield is due to the rigid laminate structure of perovskites, which can effectively inhibit the non-radiative decay of excitons. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Application of 626-64-2).

Pyridin-4-ol (cas: 626-64-2) 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. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Application of 626-64-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Revisiting the Role of Hydrogen Bonding in the Strong Dimer Superexchange of a 2D Copper(II) Halide Honeycomb-Like Lattice: Structural and Magnetic Study was written by Monroe, Jeffrey C.;Carvajal, M. Angels;Deumal, Merce;Landee, Christopher P.;Rademeyer, Melanie;Turnbull, Mark M.. And the article was included in Inorganic Chemistry in 2020.Category: pyridine-derivatives This article mentions the following:

The title compound H₂L(CuCl₃H₂O)Cl (H₂L = 1-(4′-pyridinium)pyridin-4-ol-ium), (1) was synthesized and investigated structurally and magnetically as well as via a first-principles, bottom-up theor. anal. of the potential magnetic superexchange pathways. Compound 1 can be described structurally as a well-isolated, distorted 2D-honeycomb lattice with two potential exchange pathways: a dimeric interaction via hydrogen-bonded pairs of (CuCl₃H₂O) ions and a chain structure via bridging chloride ions. Surprisingly, the exptl. magnetic data are best fitted using both a simple dimer model with a Curie-Weiss correction for interdimer exchange (J_dimer = -107.4(1) K, θ = -1.22(4) K) and a strong-rung ladder model (J_rung = -105.8(7) K, J_rail = 2(7) K). Theor. anal. at the UB3LYP/6-31+G(d) level supports the strong exchange observed through the [CuCl₄(H₂O)]^2- dimer moiety superexchange pathway (-102 K = -71 cm^-1). However, the apparent vanishingly small exchange through the single halide bridge is merely a brute average of competing ferromagnetic (FM) (+24.8 K = +17.0 cm^-1) and antiferromagnetic (AFM) (-21.0 K = -14.6 cm^-1) exchange interactions. Our computational study shows that these fitting parameters carry no phys. meaning since a honeycomb plaquette must be taken as magnetic building block for 1. The competition between FM and AFM pair interactions leads to geometrical frustration in 1 and could induce interesting magnetic response at low temperatures, if the magnetic exchange is adequately tuned by modifying substituents in ligands and, in turn, interactions within the crystal packing. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Category: pyridine-derivatives).

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Coordination Polymers as a Functional Material for the Selective Molecular Recognition of Nitroaromatics and ipso-Hydroxylation of Arylboronic Acids was written by Rani, Pooja;Husain, Ahmad;Bhasin, K. K.;Kumar, Girijesh. And the article was included in Chemistry – An Asian Journal in 2022.Category: pyridine-derivatives This article mentions the following:

We report the synthesis and structural characterization of two coordination polymers (CPs), namely; [{Zn(L)(DMF)₄} · 2BF₄]_α (1) and [{Cd(L)₂(Cl)₂} · 2H₂O]_α (2) (where L=N²,N⁶-di(pyridin-4-yl)naphthalene-2,6-dicarboxamide). Crystal packing of 1 reveals the existence of channels running along the b- and c-axis filled by the ligated DMF and lattice anions, resp. Whereas, crystal packing of 2 reveals that the metallacycles of each 1D chain are intercalating into the groove of adjacent metallacycles resulting in the stacking of 1D loop-chains to form a sheet-like architecture. In addition, both 1 and 2 were exploited as multifunctional materials for the detection of nitroarom. compounds (NACs) as well as a catalyst in the ipso-hydroxylation of aryl/heteroarylboronic acids. Remarkably, 1 and 2 showed high fluorescence stability in an aqueous medium and displayed a maximum 88% and 97% quenching efficiency for 4-NPH, resp. among all the investigated NACs. The mechanistic investigation of NACs recognition suggested that the fluorescence quenching occurred via electron as well as energy transfer process. Furthermore, the ipso-hydroxylation of aryl/heteroarylboronic acids in presence of 1 and 2 gave up to 99% desired product yield within 15 min in our established protocol. In both cases, 1 and 2 are recyclable upto five cycles without any significant loss in their efficiency. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Category: pyridine-derivatives).

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. 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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Effect of washing with diluted acids on Enteromorpha clathrata pyrolysis products: Towards enhanced bio-oil from seaweeds was written by Cao, Bin;Wang, Shuang;Hu, Yamin;Abomohra, Abd El-Fatah;Qian, Lili;He, Zhixia;Wang, Qian;Uzoejinwa, Benjamin Bernard;Esakkimuthu, Sivakumar. And the article was included in Renewable Energy in 2019.Synthetic Route of C5H5NO This article mentions the following:

Nowadays, macroalgae are widely discussed as advantageous alternative feedstock for crude bio-oil production using pyrolysis. In the present work, pyrolysis products of Enteromorpha clathrata washed with 7% phosphoric acid, hydrochloric acid and sulfuric acid were studied. In general, washing with diluted acids resulted in significant increase in the yields of bio-oil and non-condensable gas over the control in favor of the bio-char. In addition, HCl pretreatment enhanced the relative contents of aliphatic hydrocarbons in the bio-oil by 1.5 times over the control. Furthermore, HCl pretreatment showed 37% and 52.6% reduction in acids and oxygen-containing compounds, resp., with respect to the control. FTIR anal. showed that acid-washing led to reduction in O-H stretching vibration, confirming that it can disrupt hydroxyl bonds reducing phenols, carboxylic acids and water impurities in the bio-oil. In conclusion, washing of biomass using diluted acids could play a key role to enhance the bio-oil yield and significantly influence products characteristics; particularly, HCl enhanced bio-oil yield with higher aliphatic hydrocarbons proportion. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Synthetic Route of C5H5NO).

Pyridin-4-ol (cas: 626-64-2) 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. 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.Synthetic Route of C5H5NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem