Tag: M.W=150-200

An article Solvent-free microwave-assisted synthesis of imidazo[1,5-a]pyridine and -quinoline derivatives WOS:000481164400001 published article about RATIOMETRIC FLUORESCENT-PROBE; COMPLEXES; EFFICIENT; LIGHT; TRANSANNULATION; ALDEHYDES; EMISSION; LIGANDS; IMIDAZO; SHIFT in [Herr, Jasmin Martha; Roessiger, Carina; Goettlich, Richard] Justus Liebig Univ Giessen, Inst Organ Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany; [Herr, Jasmin Martha; Roessiger, Carina; Albrecht, Georg; Goettlich, Richard] Justus Liebig Univ Giessen, Ctr Mat Res LaMa, Giessen, Germany; [Albrecht, Georg] Justus Liebig Univ Giessen, Inst Appl Phys, Giessen, Germany; [Yanagi, Hisao] NAIST, Dept Mat Sci, Nara, Japan in 2019.0, Cited 39.0. Quality Control of Phenyl(pyridin-2-yl)methanone. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1

A quick and highly efficient microwave-assisted preparation of imidazopyridines and -quinolines is described, starting from the corresponding ketones and amines. The method requires no solvent and uses activated MnO2 as an oxidant. A mechanism for the cyclization is proposed and discussed.

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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

COA of Formula: C8H9NO2. Shpanko, IV; Sadovaya, IV in [Shpanko, I. V.] V Stus Donetsk Natl Univ, UA-21021 Vinnitsa, Ukraine; [Sadovaya, I. V.] Donetsk Natl Univ, Donetsk, Ukraine published Isoenthalpy Catalytic Effects of Pyridines in Reactions of Phenyloxyrane with N-Aroylbenzenesulfonamides in 2019, Cited 21. The Name is Ethyl nicotinate. Through research, I have a further understanding and discovery of 614-18-6.

Additive nature of the combined effect of the structure (X, Y substituents) and temperature on the rate and free activation energy has been established for the reactions of phenyloxirane with Y-substituted N-aroylbenzenesulfonamides catalyzed by X-substituted pyridines. The cross reaction series is isoenthalpic with respect to the structural effects. The mechanism of the catalytic process has been discussed.

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Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

COA of Formula: C12H9NO. In 2020 GREEN CHEM published article about C DOUBLE-BOND; MOLECULAR-OXYGEN; FREE CATALYST; PHOTOOXIDATIVE CLEAVAGE; ALPHA-METHYLSTYRENE; SINGLET-OXYGEN; ALCOHOLS; GREEN; CO2; TRANSFORMATION in [Zhang, Yu; Das, Shoubhik] Univ Antwerp, Dept Chem, ORSY Div, Gronenborgerlaan 171, B-2020 Antwerp, Belgium; [Zhang, Yu; Hatami, Nareh; Lange, Niklas Simon; Schilling, Waldemar] Georg August Univ Gottingen, Inst Biomol & Organ Chem, Tammannstr 2, D-37077 Gottingen, Germany; [Ronge, Emanuel; Jooss, Christian] Georg August Univ Gottingen, Inst Materialphys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany in 2020, Cited 68. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1.

Selective cleavage of C & xe001;C bonds is highly important for the synthesis of carbonyl containing fine chemicals and pharmaceuticals. Novel methodologies such as ozonolysis reactions, Lemieux-Johnson oxidation reactionetc. already exist. Parallel to these, catalytic methods using homogeneous catalysts also have been discovered. Considering the various advantages of heterogeneous catalysts such as recyclability and stability, couple of transition metal-based heterogeneous catalysts have been applied for this reaction. However, the pharmaceutical industries prefer to use metal-free catalysts (especially transition metal-free) to avoid further leaching in the final products. This is for sure a big challenge to an organic chemist and to the pharmaceutical industries! To make this feasible, a mild and efficient protocol has been developed using polymeric carbon nitrides (PCN) as metal-free heterogeneous photocatalysts to convert various olefins into the corresponding carbonyls. Later, this catalyst has been applied in the gram scale synthesis of pharmaceutical drugs using direct solar energy. Detailed mechanistic studies revealed the actual role of oxygen, the catalyst, and the light source.

COA of Formula: C12H9NO. Welcome to talk about 91-02-1, If you have any questions, you can contact Zhang, Y; Hatami, N; Lange, NS; Ronge, E; Schilling, W; Jooss, C; Das, S or send Email.

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Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

An article Synthesis, characterization, in vitro antimicrobial and anticancer studies of new platinum N-heterocyclic carbene (NHC) complexes and unexpected nickel complexes WOS:000485103500021 published article about STRUCTURAL-CHARACTERIZATION; BIOLOGICAL-ACTIVITY; CRYSTAL-STRUCTURES; METAL-COMPLEXES; DNA-BINDING; LIGANDS; IMIDAZOLIUM; PYRIDINE; ANTIBACTERIAL; CYTOTOXICITY in [Choo, Kar Bee; Lee, Sui Mae; Lee, Wai Leng; Cheow, Yuen Lin] Monash Univ Malaysia, Sch Sci, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor, Malaysia in 2019.0, Cited 74.0. Recommanded Product: 91-02-1. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1

A series of bidendate pyridine-functionalized metal N-heterocyclic carbene (NHC) complexes with various wingtip substituents (R = methyl, phenyl and tert-butyl) had been prepared from silver oxide-mediated transmetalation method. The basic backbone of the NHC ligands were prepared in two step-wise reactions: reduction of the commercially available 2-benzoylpyridine, followed by halogenation to yield 2-(chloro(phenyl) methyl) pyridine. Subsequent reactions with different imidazoles gave the desired imidazolium salts (or NHC precursors) with different R groups at the N wingtip (R = Me, Ph, t-Bu). Transmetalation of the imidazolium salts into platinum NHC complexes were achieved by using Ag2O mediated method with Pt(cod)Cl-2 as the transmetalating agent. On the other hand, nickel NHC complexes were obtained via one pot synthesis method with nickel chloride as the transmetalating agent and reflux in the presence of a base. Following recrystallisation, the molecular structure of Pt NHC complex (+/-)-5a had been successfully elucidated via single crystal X ray diffraction (XRD) analysis. The six-membered ring of the platinum NHC complexes adopted a boat conformation with the phenyl ring arranged at the axial position. Meanwhile, two unexpected nickel complexes, i.e. a simple nickel coordination complex and a nickelate complex, were obtained and studied using XRD. These Pt NHC complexes and unexpected Ni complexes were evaluated for their in vitro antimicrobial and anticancer activities against a panel of pathogenic microorganisms and three selected human cancer cell lines, including breast (MCF7), colon (HCT116) and oral (H103) cancer cells. Generally, the Pt NHC complexes displayed enhanced antimicrobial activities upon coordination to metals, as compared to the corresponding imidazolium salts i.e. NHC precursors, with minimum inhibitory concentration (MIC) values in micromolar (mM) range. A couple of platinum NHC complexes synthesized exhibited antimicrobial activities with MIC as low as 2 mM, which are comparable to silver NHC complexes with renowned antimicrobial profiles. Similarly, upon coordination to the metals, the cytotoxic effects of the platinum NHC complexes increased significantly as compared to the imidazolium salts. Among all, platinum NHC complex (+/-)-5c displayed significant cytotoxicities towards the cancer cells with IC50 values that are two to three times lower than that of the anticancer drug cisplatin. In summary, evidences for influence of both wingtip substituents and metals on the biological activities of the complexes have been found. (C) 2019 Elsevier B.V. All rights reserved.

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Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

An article Oxyfunctionalization of Alkanes Based on a Tricobalt(II)-Substituted Dawson-Type Rhenium Carbonyl Derivative as Catalyst WOS:000548456300009 published article about HETEROPOLYTUNGSTATE DERIVATIVES; HETEROGENEOUS CATALYSTS; CYCLOHEXANE OXIDATION; W-183 NMR; METAL; KEGGIN; PERFORMANCE; FUNCTIONALIZATION; HYDROCARBONS; OXYGENATION in [Ma, Xinyi; Wang, Ping; Liu, Zhihao; Xin, Changhui; Wang, Siyu; Jia, Jiage; Ma, Pengtao; Niu, Jingyang; Wang, Jingping] Henan Univ, Henan Key Lab Polyoxometalate Chem, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China in 2020.0, Cited 61.0. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1. Category: pyridine-derivatives

POM-supported metal carbonyl derivatives (PMCDs) represent a family of tremendous potential catalysts owing to their peculiar physical and chemical properties. Yet low-valence transition metal-substituted Dawson-type PMCD catalysts are uncommon. Hence, we synthesized a tricobalt-substituted PMCDs by conventional aqueous solution method, [Na(H2O)(5)](NH4)(7)[P2W15O56Co3(H2O)(3)(OH)(3)Re(CO)(3)]center dot 13H(2)O (1), and characterized by single crystal X-ray diffraction crystallography, IR, and thermogravimetric analyses (TGA), etc. The obtained compound 1 was employed as a catalyst for the oxidation of diphenylmethane (DPM) to benzophenone, giving 96.8% yield in the presence of tert-butyl hydroperoxide (TBHP) and pyridine. The control experiments indicate that Co metal ion plays an important role in the catalytic reactions. As a side note, the electrospray ionization mass spectrometry (ESI-MS) and UV spectroscopy showed that 1 can retain its integrity in solution, and magnetic measurements indicated that 1 exhibited a weaker ferromagnetic interaction at low temperature.

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Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Authors Du, JY; Li, YM; Xu, JC; Huang, MQ; Wang, J; Chao, JF; Wu, JH; Sun, HB; Ding, HM; Ye, H in ELSEVIER SCI LTD published article about in [Du, Jingyi; Huang, Mingquan; Wang, Juan; Wu, Jihong; Ye, Hong] Beijing Technol & Business Univ BTBU, China Light Ind, Key Lab Brewing Mol Engn, Beijing 100048, Peoples R China; [Li, Yueming; Xu, Jianchun; Chao, Jinfu; Sun, Huibin; Ding, Haimei] Qingdao Langyatai Grp Ltd, Qingdao 266500, Peoples R China in 2021, Cited 44. HPLC of Formula: C8H9NO2. The Name is Ethyl nicotinate. Through research, I have a further understanding and discovery of 614-18-6

A study was carried out to determine systematically the key aroma-active compounds of Langyatai Baijiu with Jian flavour (LBJF) using sensory omics analysis (SOA). A total of 56 odorants were screened out using gas chromatography-olfactometry-mass spectrometry (GC-O-MS)/Osme analysis. Among them, 15 aroma-active components were first identified. After quantitation, 30 odorants had odour activity values (OAVs) > 1.0 in LBJF. Recombinant and omission experiments proved that the esters, alcohols, acids, especially ethyl hexanoate, gamma psi psi-nonalactone, and dimethyl trisulfide, were critical to the flavour of LBJF. The basic and commercial liquors had obvious differences in the skeleton compositions of esters and acids. This study uncovers the characteristics of Jian flavour Baijiu (JFB) and provides a scientific basis for the quality control of JFB, which is helpful for the development of Chinese Baijiu flavour styles.

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Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Computed Properties of C12H9NO. In 2019.0 ISCIENCE published article about 1,2-ASYMMETRIC INDUCTION; ALLYLATION REACTIONS; RADICAL REACTIONS; REDUCTION; CHEMISTRY; DISCOVERY; EXCHANGE; KETONES in [Shao, Tianju; Li, Yajuan; Li, Chunyang; Zhao, Xiaowei; Qiao, Baokun; Jiang, Zhiyong] Henan Univ, Key Lab Nat Med & Immunoengn Henan Prov, Kaifeng 475004, Henan, Peoples R China; [Ma, Nana; Jiang, Zhiyong] Henan Normal Univ, Henan Key Lab Organ Funct Mol & Drug Innovat, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China; [Chai, Guobi] Zhengzhou Tobacco Res CNTC, Zhengzhou 450001, Henan, Peoples R China in 2019.0, Cited 61.0. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1.

The site-specific incorporation of deuterium (D) into small molecules is frequently used to access isotopically labeled compounds with broad utility in many research areas, such as drug development, mechanistic studies, and NMR analyses. Nevertheless, the deuteration of a stereocenter in an enantioselective manner, which could slow the metabolism and improve the bioavailability of bioactive molecules, remains challenging owing to the lack of established catalytic methods. Here, we report an asymmetric alpha-deuteration strategy for azaarenes with inexpensive D2O as the deuterium source. A cooperative visible light-driven photoredox and chiral Bronsted acid-catalyzed system using a Hantzsch ester as the terminal reductant has been developed, which enables racemic alpha-chloro-azaarenes and prochiral azaarene-substituted ketones to experience a single-electron reduction-enantioselective deuteration process. The transition metal-free method provides important chiral alpha-deuterated azaarenes in satisfactory yields with good to excellent enantioselectivities (up to 99% ee) and substantial deuterium incorporation.

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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

In 2019 ORG BIOMOL CHEM published article about REDOX-ACTIVE LIGANDS; METAL; HYDROSILYLATION; HYDROGENATION; CARBONYL; COMPLEXES; FUNCTIONALIZATION; HYDROBORATION; ALDEHYDES; KETONES in [Tamang, Sem Raj; Cozzolino, Anthony F.; Findlater, Michael] Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA in 2019, Cited 45. The Name is Ethyl nicotinate. Through research, I have a further understanding and discovery of 614-18-6. Recommanded Product: Ethyl nicotinate

The reaction of (dppBIAN) FeCl2 with 3 equivalents of n-BuLi affords a catalytically active anionic Fe complex; the nature of the anionic complex was probed using EPR and IR experiments and is proposed to involve a dearomatized, radical, ligand scaffold. This complex is an active catalyst for the hydrosilylation of esters to afford alcohols; loadings as low as 1 mol% were employed.

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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

In 2019.0 DYES PIGMENTS published article about AGGREGATION-INDUCED EMISSION; POLYMERIC NANOPARTICLES; ORGANIC NANOPARTICLES; LIQUID-CHROMATOGRAPHY; HYDROGEN-SULFIDE; CLICK REACTION; HUMAN PLASMA; AIE; HOMOCYSTEINE; THIOLS in [Sheng, Huace; Hu, Yonghong; Zhao, Xinxin; Yang, Wenge] Nanjing Tech Univ, Sch Pharmaceut Sci, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China; [Hu, Yonghong; Fan, Shimin] Nanjing Tech Univ, Synerget Innovat Ctr Adv Mat, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China; [Zhou, Yi] Nanjing Tech Univ, Coll Chem & Mol Engn, Nanjing 211816, Jiangsu, Peoples R China; [Cao, Yang] Jiangsu Prov Hosp, Nanjing 210000, Jiangsu, Peoples R China in 2019.0, Cited 58.0. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1. SDS of cas: 91-02-1

A new imidazo [1,5-alpha]pyridine-based fluorescent probe, named MZC-AC, is developed for the detection of cysteine (Cys) based on an excited state intramolecular proton transfer (ESIPT) mechanism. The probe MZC-AC uses an acrylate moiety as the ESIPT blocking group as well as the recognition site. Upon the treatment with Cys, MZC-AC exhibits a dramatic fluorescence enhancement (85-fold) and a large Stokes shift (166 nm). The limit of detection obtained from fluorescent titration was as low as 0.07 mu M. MZC-AC displays highly sensitive and selective response to Cys over homocysteine (Hcy) and glutathione (GSH). Significantly, MZC-AC could be used to detect Cys in living cells.

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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

An article Recyclable Heterogeneous Copper(II)-Catalyzed Oxidative Cyclization of 2-Pyridine Ketone Hydrazones Towards [1,2,3]Triazolo[1,5-a]pyridines WOS:000498564900018 published article about N BOND-FORMATION; SP(3) C-H; CATALYZED DENITROGENATIVE TRANSANNULATION; CROSS-COUPLING REACTIONS; ONE-POT SYNTHESIS; EFFICIENT SYNTHESIS; COORDINATION-COMPOUNDS; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; MOLECULAR-OXYGEN in [Jiang, Gan; Lin, Yang; Zhao, Hong] Guangdong Pharmaceut Univ, Guangdong Cosmet Engn & Technol Res Ctr, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China; [Cai, Mingzhong] Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Jiangxi, Peoples R China in 2019.0, Cited 99.0. The Name is Phenyl(pyridin-2-yl)methanone. Through research, I have a further understanding and discovery of 91-02-1. Safety of Phenyl(pyridin-2-yl)methanone

The heterogeneous copper(II)-catalyzed oxidative cyclization of 2-pyridine ketone hydrazones was achieved in ethyl acetate at room temperature in the presence of an MCM-41-anchored bidentate 2-aminoethylamino copper(II) catalyst [MCM-41-2N-Cu(OAc) (2) ], in the presence of air as the oxidant, yielding a wide variety of [1,2,3]triazolo[1,5- a ]pyridines in mostly good to high yields. The present method was also applied to the direct one-pot synthesis of [1,2,3]triazolo[1,5- a ]pyridines from 2-acylpyridine derivatives and hydrazine monohydrate. Importantly, this supported copper(II) catalyst could be conveniently obtained via a simple procedure from easily available and inexpensive reagents, recovered by filtration of the reaction mixture, and reused at least seven times without a significant loss of catalytic activity.

Welcome to talk about 91-02-1, If you have any questions, you can contact Jiang, G; Lin, Y; Cai, MZ; Zhao, H or send Email.. Safety of Phenyl(pyridin-2-yl)methanone

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem