Day: October 20, 2022

Yakhontov, L. N.; Lapan, E. I. published the artcile< Azaindole derivatives. XLI. Synthesis of 3-substituted 5-azaindoles>, Application In Synthesis of 23612-36-4, the main research area is substitution azaindole electrophilic; nitration azaindole; bromination azaindole; cyanomethylation azaindole; Mannich reaction azaindole.

Bromination of 5-azaindole (I, R = H) with Br in dioxane gave 3-bromo-5-azaindole (II, R = H, R1 = Br) quant. Nitration of I (R = H) gave 3-nitro-5-azaindole (II, R = H, R1 = NO2) quant. 5-Azagramine (II, R = H, R1 = CH2NMe2) was obtained in 92% yield by a Mannich reaction with Me2NH and CH2O. Analogously 13% 1-phenyl-5-azagramine (II, R = Ph, R1 = CH2NMe2) was obtained. Cyanomethylation of I (R = H) yielded 23% azaindole III (R = H), which, when heated with KOH gave 31% acid II (R = H, R1 = CH2CO2H).

Khimiya Geterotsiklicheskikh Soedinenii published new progress about Bromination. 23612-36-4 belongs to class pyridine-derivatives, and the molecular formula is C7H5BrN2, Application In Synthesis of 23612-36-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Jiacheng; Siang Tan, Suan; Kyne, Sara Helen; Chan, Philip Wai Hong published the artcile< Minisci-Type Alkylation of N-Heteroarenes by N-(Acyloxy)phthalimide Esters Mediated by a Hantzsch Ester and Blue LED Light>, Category: pyridine-derivatives, the main research area is alkylated quinoline preparation; quinoline acyloxy phthalimide ester Minisci type alkylation HE mediated; isoquinoline alkylated preparation; acyloxy phthalimide ester isoquinoline Minisci type alkylation HE mediated; pyridine alkylated preparation; phthalimide ester acyloxy pyridine Minisci type alkylation HE mediated.

A synthetic method that enabled the Hantzsch ester (HE)-mediated Minisci-type C2-alkylation of quinolines, isoquinolines and pyridines by N-(acyloxy)phthalimide esters (NHPI) to afford alkylated N-heterocyclic products, e.g., I, under blue LED (light emitting diode) light (456 nm) was described. Achieved under mild reaction conditions at room temperature, the metal-free synthetic protocol was shown to be applicable to primary, secondary and tertiary NHPIs to give the alkylated N-heterocyclic products in yields of 21-99%. On introducing a chiral phosphoric acid, an asym. version of the reaction was also realized and provided product enantiomeric excess (ee) values of 53-99%.

Advanced Synthesis & Catalysis published new progress about Alkylation. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bori, Jugal; Mahata, Satyajit; Manivannan, Vadivelu published the artcile< A new route for the synthesis of 2,4-bis(2-pyridyl)-6-(pyridyl)pyrimidines: Synthesis and characterization of Co(II), Ni(II) complexes of 2,4,6-tris(2-pyridyl)pyrimidine>, Application In Synthesis of 350-03-8, the main research area is cobalt nickel pyridyl pyrimidine complex preparation crystal structure DFT; EPR spectra cobalt nickel pyridyl pyrimidine complex.

Using 2-acetylpyridine, sodium hydroxide and 2-cyanopyridine, 2,4,6-tris(2-pyridyl)pyrimidine (L1) was synthesized in good yield. Similarly, 2,4-bis(2-pyridyl)-6-(3-pyridyl)pyrimidine (L2) and 2,4-bis(2-pyridyl)-6-(4-pyridyl)pyrimidine (L3) were also synthesized by using resp. acetylpyridine. 2-Acetylpyridine reacted with sodium hydroxide to produce 2-oxo-2-(2-pyridyl)-1-ethanide, which behaves as a nucleophile towards 2-cyanopyridine. All three pyrimidines are potential multidentate ligand and by using L1 complexes of composition [Ni(L1)(H2O)3](NO3)2·4H2O (1), [Ni(L1)2](NO3)2·2H2O (2) and [Co(L1)2](NO3)2·1.5H2O (3) were isolated and structurally characterized. In 1-3, L1 behaves as a tridentate pincer type ligand, DFT calculations performed on L1-L3 indicate that energy difference between HOMO and LUMO is 4.544, 4.643 and 4.533 eV, resp.

Inorganica Chimica Acta published new progress about Crystal structure. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Application In Synthesis of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Shirani, Farzaneh; Mazdak, Ali; Mazaheri, Peiman; Shirani, Mehrangiz; Samimi, Pouran published the artcile< Evaluation of the effect of anti-COVID-19 mouthwashes on shear bond strength of composite resin restorations to dentin and enamel: an ""in vitro study"">, Name: 1-Hexadecylpyridin-1-ium chloride, the main research area is dentin enamel shear bond strength mouthwash coronavirus disease 2019.

Given the high prevalence of the coronavirus and the high risk of virus transfer to dentists, the use of mouthwashes, which can potentially eliminate this virus, is suggested before dental procedures. Since these mouthwashes may affect the bond strength of composite resin restorations to teeth, this study was conducted to investigate the effect of recommended mouthwashes on the shear bond strength of composite resin restorations to dentin and enamel in selective etch and rinse and two-step self-etch bonding systems. Five groups of posterior teeth (n = 15) were selected for five groups of cetylpyridinium chloride 0.07%, povidone-iodine 1%, hydrogen peroxide 1%, and chlorhexidine 0.2% as mouthwash and distilled water as the control group. The buccal enamel and lingual dentin of each tooth were rinsed after immersion in a mouthwash. After 20 s of enamel acid-etching and 15 s of dentin priming, they were impregnated with an adhesive, and composite cylinders were placed on the dentin and enamel surfaces of the tooth. The shear bond strength test was performed after 24 h, and results were analyzed by ANOVA and paired t-test (α = 0.05). The mean shear bond strength of enamel to composite was significantly (p = 0.05) higher than that of dentin to composite in each study group, but no significant difference was found between the mean shear bond strength of composite to enamel (p = 0.199) and to dentin (p = 0.335) after the use of mouthwashes and that of the control group. The use of mouthwashes used in this study did not have neg. effects on the shear bond strength of composite to enamel and dentin.

BioMed Research International published new progress about Bond energy (shear). 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Name: 1-Hexadecylpyridin-1-ium chloride.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Elshikh, Mohamed S.; Chen, Tse-Wei; Mani, G.; Chen, Shen-Ming; Huang, Po-Jui; Ali, M. Ajmal; Al-Hemaid, Fahad M.; Al-Mohaimeed, Amal M. published the artcile< Green sonochemical synthesis and fabrication of cubic MnFe2O4 electrocatalyst decorated carbon nitride nanohybrid for neurotransmitter detection in serum samples>, Formula: C7H7NO2, the main research area is neurotransmitter MnFe2o4 electrocatalyst carbon nitride; Bimetal oxides; Graphitic carbon nitride; Hybrid materials; Neurotransmitter detection; Sonochemical synthesis.

The binary nanomaterials and graphitic carbon based hybrid has been developed as an important porous nanomaterial for fabricating electrode with applications in non-enzymic (bio) sensors. We report a fast synthesis of bimetal oxide particles of nano-sized manganese ferrite (MnFe2O4) decorated on graphitic carbon nitride (GCN) via a high-intensity ultrasonic irradiation method for C (30 kHz and 70 W/cm2). The nanocomposites were analyzed by powder X-ray diffraction, XPS, EDS, TEM to ascertain the effects of synthesis parameters on structure, and morphol. The MnFe2O4/GCN modified electrode demonstrated superior electrocatalytic activity toward the neurotransmitter (5-hydroxytryptamine) detection with a high peak intensity at +0.21 V. The appealing application of the MnFe2O4/GCN/GCE as neurotransmitter sensors is presented and a possible sensing mechanism is analyzed. The constructed electrochem. sensor for the detection of 5-hydroxytryptamine (STN) showed a wide working range (0.1-522.6μM), high sensitivity (19.377μA μM-1 cm-2), and nano-molar detection limit (3.1 nM). Moreover, it is worth noting that the MnFe2O4/GCN not only enhanced activity and also promoted the electron transfer rate towards STN detection. The proposed sensor was analyzed for its real-time applications to the detection of STN in rat brain serum, and human blood serum in good satisfactory results was obtained. The results showed promising reproducibility, repeatability, and high stability for neurotransmitter detection in biol. samples.

Ultrasonics Sonochemistry published new progress about Brain. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Formula: C7H7NO2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Nakamura, Hugh; Yasui, Kosuke; Kanda, Yuzuru; Baran, Phil S. published the artcile< 11-Step Total Synthesis of Teleocidins B-1-B-4>, Category: pyridine-derivatives, the main research area is teleocidin B synthesis.

A unified and modular approach to the teleocidin B family of natural products is presented that proceeds in 11 steps and features an array of interesting strategies and methods. Indolactam V, the known biosynthetic precursor to this family, was accessed through electrochem. amination, Cu-mediated aziridine opening, and a remarkable base-induced macrolactamization. Guided by a desire to minimize concession steps, the tactical combination of C-H borylation and a Sigman-Heck transform enabled the convergent, stereocontrolled synthesis of the teleocidins.

Journal of the American Chemical Society published new progress about Amination (electrochem.). 1416819-91-4 belongs to class pyridine-derivatives, and the molecular formula is C13H15F3N2O, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Firth, Nicholas C.; Atrash, Butrus; Brown, Nathan; Blagg, Julian published the artcile< MOARF, an Integrated Workflow for Multiobjective Optimization: Implementation, Synthesis, and Biological Evaluation>, Safety of (6-Methylpyridin-3-yl)methanamine, the main research area is MOARF structure activity relationship.

We describe the development and application of an integrated, multiobjective optimization workflow (MOARF) for directed medicinal chem. design. This workflow couples a rule-based mol. fragmentation scheme (SynDiR) with a pharmacophore fingerprint-based fragment replacement algorithm (RATS) to broaden the scope of reconnection options considered in the generation of potential solution structures. Solutions are ranked by a multiobjective scoring algorithm comprising ligand-based (shape similarity) biochem. activity predictions as well as physicochem. property calculations Application of this iterative workflow to optimization of the CDK2 inhibitor Seliciclib (CYC202, R-roscovitine) generated solution mols. in desired physicochem. property space. Synthesis and exptl. evaluation of optimal solution mols. demonstrates CDK2 biochem. activity and improved human metabolic stability.

Journal of Chemical Information and Modeling published new progress about Drug design. 56622-54-9 belongs to class pyridine-derivatives, and the molecular formula is C7H10N2, Safety of (6-Methylpyridin-3-yl)methanamine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pal, Amalendu; Punia, Renu published the artcile< Mixed micellization behaviour of tri-substituted surface active ionic liquid and cationic surfactant in aqueous medium and salt solution: Experimental and theoretical study>, Recommanded Product: 1-Hexadecylpyridin-1-ium chloride, the main research area is tetradecyldimethylimidazolium cetyltrimethylammonium sodium bromide aqueous medium micellization physiochem property.

The aim of the present study is to investigate the mixed micellization behavior of trisubstituted surface active ionic liquid (SAIL) 1-tetradecyl-2,3-dimethylimidazolium bromide and cationic surfactant CTAB in aqueous solution and in the presence of inorganic salt, NaBr using the conductivity, steady-state fluorescence and 1H NMR measurements. The degree of counter-ion dissociation (g), critical micelle concentration (cmc), various thermodn. parameters of micellization (ΔG0m, ΔH0m and ΔS0m) have been evaluated from conductivity measurements. The aggregation number (Nagg) of mixed micelle has been ascertained from steady-state fluorescence quenching indicate that the contribution of CTAB was always more than that of SAIL. Various mixed micellar parameters such as ideal cmc (cmc*), activity coefficients (f1 and f2), micellar mole fraction of CTAB in mixed and ideal state (Xm1andXideal1), interaction parameter (βm) and excess Gibbs free energy of micellization (ΔGex) have been calculated at temperatures of (298.15, 308.15 and 318.15) K. Mixed micellar parameters (cmc*, Xm1, and ΔGex) reveal non-ideal behavior of the mixed system and magnitude of interaction parameter (βm) becomes more neg. in the presence of salt. 1H NMR shed light on the electrostatic interactions between CTAB and SAIL in mixed state.

Journal of Molecular Liquids published new progress about Electric conductivity. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Recommanded Product: 1-Hexadecylpyridin-1-ium chloride.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hu, Yechen; Li, Yang; Gao, Hang; Jiang, Bo; Zhang, Xiaodan; Li, Xiao; Wu, Qiong; Liang, Zhen; Zhang, Lihua; Zhang, Yukui published the artcile< Cleavable hydrophobic derivatization strategy for enrichment and identification of phosphorylated lysine peptides>, Synthetic Route of 2127-03-9, the main research area is lysine phosohopeptide derivatization; Cleavable hydrophobic derivatization; Liquid chromatography–tandem mass spectrometry; N-Phosphorylation; Phosphorylated lysine peptides; Proteomics.

Because of structural flexibility and acid lability, the identification of phosphorylated lysine (pLys) peptides is a great challenge. The authors report here a cleavable hydrophobic derivatization (CHD) strategy for the enrichment and identification of pLys peptides. First, 2,5-dioxopyrrolidin-1-yl-3-(decyldithio)propanoate was synthesized to react with dephosphorylated lysine peptides, and then the derived peptides were captured by a C18 column, followed by cleavage of the hydrophobic chain, with the specific label left on the target peptides for further identification. By CHD, the enrichment of pLys peptides from interfering peptides (1:1000 mass ratio) was achieved. Furthermore, CHD was applied to screen the pLys targets from Escherichia coli lysates, and 39 pLys sites from 35 proteins were identified. Gene Ontol. (GO) anal. showed that these proteins played vital roles in catabolism, metabolism, biogenesis, and biosynthetic processes. All these results demonstrate that CHD might pave the way for comprehensive profiling of the pLys proteome.

Analytical and Bioanalytical Chemistry published new progress about Escherichia coli. 2127-03-9 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2S2, Synthetic Route of 2127-03-9.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Huang, Chia-Yu; Stauffer, Tara M.; Strickland, Corey L.; Reader, John C.; Huang, He; Li, Ge; Cooper, Alan B.; Doll, Ronald J.; Ganguly, Ashit K.; Baldwin, John J.; Rokosz, Laura L. published the artcile< Guiding farnesyltransferase inhibitors from an ECLiPS library to the catalytic zinc>, Formula: C7H10N2, the main research area is piperazine derivative preparation structure farnesyltransferase inhibitor crystal structure.

Farnesyltransferase inhibitors identified from an ECLiPS library were optimized using solution-phase synthesis. X-ray crystallog. of inhibited complexes was used to identify substructures that coordinate to the active site zinc. The x-ray structures were ultimately used to guide the design of second-generation analogs with FTase IC50s of less than 1.0 nM.

Bioorganic & Medicinal Chemistry Letters published new progress about Conformation. 56622-54-9 belongs to class pyridine-derivatives, and the molecular formula is C7H10N2, Formula: C7H10N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem