Month: September 2022

Markovic, Tim;Rocke, Benjamin N.;Blakemore, David C.;Mascitti, Vincent;Willis, Michael C. published 《Pyridine sulfinates as general nucleophilic coupling partners in palladium-catalyzed cross-coupling reactions with aryl halides》. The research results were published in《Chemical Science》 in 2017.Recommanded Product: 2098851-48-8 The article conveys some information:

An efficient procedure was reported for the synthesis of aryl pyridines via Pd-catalyzed desulfinylative cross-coupling of pyridine sulfinates and aryl halides. In addition, these pyridine sulfinates were applied in a library format to the preparation of medicinally relevant derivatives, (6S,10R)-2-(aryl)-7,8,9,10-tetrahydro-6H-6,10-methanoazepino[4,5-g]quinoxalines, I [R = 6-MeO-pyridin-3-yl, 3-pyridyl, 5-Cl-pyridin-2-yl, etc.] of the drug varenicline and N’-(2,2′-biaryl)-N’-(4-methoxybenzyl)-N,N-dimethylethane-1,2-diamines, e.g., II of the drug mepyramine.Sodium 5-(trifluoromethyl)pyridine-2-sulfinate (cas: 2098851-48-8) were involved in the experimental procedure.

N-Arylation of a wide range of NH substrates by reaction with boronic acid in the presence of cupric acetate and either triethylamine or pyridine at room temperature. The reaction works even for poorly nucleophilic substrates such as arylamide. So Sodium 5-(trifluoromethyl)pyridine-2-sulfinate(cas: C6H3F3NNaO2S) can also undergo this reaction.Recommanded Product: 2098851-48-8

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Sarvi, Iraj;Zahedi, Ehsan published 《Zinc Oxide/Graphene Oxide as a Robust Active Catalyst for Direct Oxidative Synthesis of Nitriles from Alcohols in Water》 in 2022. The article was appeared in 《Catalysis Letters》. They have made some progress in their research.Quality Control of 3-Cyanopyridine The article mentions the following:

In this work, without using any linker or chem. modification of graphene oxide, a zinc oxide immobilized graphene oxide-based catalyst was used for the direct aerobic oxidative conversion of alcs. to the nitriles in water. In the first step, graphene oxide was prepared and then zinc ions were electrostatically adsorbed onto the surface of graphene oxide. In the following step, zinc oxide nanoparticles were generated via in-situ growth in presence of NaOH. It was illustrated that graphene oxide layers can control the size of in-situ generated zinc oxide nanoparticles. Various aromatic/aliphatic/heteroaromatic primary alcs. converted to the nitriles in high yields under O₂ balloon with ZnO/GO catalyst. This catalyst can be used for 7 successful consecutive runs without significant loss of activity.3-Cyanopyridine (cas: 100-54-9) were involved in the experimental procedure.

3-Cyanopyridine(cas: 100-54-9) has been shown to have a number of pharmacological effects: it inhibits the production of prostaglandin E2 and nitric oxide in congestive heart failure patients; it prevents the formation of diazonium salt from benzene and nitrogen dioxide; it inhibits the growth of tumor cell lines; and it protects mice from radiation injury by scavenging reactive oxygen species. Quality Control of 3-Cyanopyridine

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Quality Control of 3-CyanopyridineIn 2021, Wasfy, Nour;Doan, Brian;Rasheed, Faizan;Fishlock, Dan;Orellana, Arturo published 《Palladium-Catalyzed, Mild Dehydrogenation of 4-Alkylpyridines》. 《ACS Catalysis》published the findings. The article contains the following contents:

A mild palladium-catalyzed selective dehydrogenation of 4-alkylpyridines e.g., I that exploits their soft enolization to alkylidene dihydropyridines e.g., II using allyl chloroformate under metal-free conditions was reported. Treatment of these intermediates with a palladium catalyst liberates an alkylpyridylic anion and an allylpalladium(II) intermediate, which combine and undergo β-hydride elimination to install a double bond. Importantly, the formation of gas byproducts makes the process very practical. Furthermore, the reaction tolerates a broad range of functional groups, including many that can be dehydrogenated using similar palladium-catalyzed reactions, and is selective for 4-alkylpyridines e.g., I even in substrates bearing multiple pyridylic positions. To complete the study, the researchers used 3-Cyanopyridine (cas: 100-54-9) .

3-Cyanopyridine(cas: 100-54-9) has been shown to have a number of pharmacological effects: it inhibits the production of prostaglandin E2 and nitric oxide in congestive heart failure patients; it prevents the formation of diazonium salt from benzene and nitrogen dioxide; it inhibits the growth of tumor cell lines; and it protects mice from radiation injury by scavenging reactive oxygen species. Quality Control of 3-Cyanopyridine

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamideIn 2022, Chen, Qincheng;Cheng, Zhiwen;Li, Xiaoying;Wang, Chen;Yan, Lili;Shen, Guoqing;Shen, Zhemin published 《Degradation mechanism and QSAR models of antibiotic contaminants in soil by MgFe-LDH engineered biochar activating urea-hydrogen peroxide》. 《Applied Catalysis, B: Environmental》published the findings. The article contains the following contents:

Developing an in-situ soil remediation technol. for simultaneous catalytic degradation of contaminants and nitrogen supplementation is of great importance but remains challenging. Herein, MgFe-LDH engineered biochar (MB) was successfully synthesized by using a simple co-precipitation method. The as-prepared materials were used as catalysts for the first time to activate urea-hydrogen peroxide (UHP) to degrade antibiotic sulfamethoxazole (SMX) and provide nitrogen. The enhanced degradation efficiency of SMX (91%) were mainly attributed to •OH and ¹O₂-mediated oxidation Pot experiments showed MB/UHP significantly decreased the SMX concentration from 6.47 to 2.10 mg kg^-1 and simultaneously increased NH⁺₄-N and NO^–₃-N concentration The optimal quant.-structure-activity-relationship model for 19 antibiotics suggested the dipole moment, energy of the HOMO, and bond order were the intrinsic influencing factors. This study not only provides a green remediation technol. but also offers a theor. basis for estimating the removal rate of unexplored antibiotics. And 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide (cas: 80-32-0) was used in the research process.

4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide(cas: 80-32-0) can be introduced in the drinking water to fabricate aqueous liquid formulations for combating bacterial and protozoal in animals.Reference of 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide Besides, sulfachloropyridazine associated to tripelennamine hydrocholoride has been demonstrated to function as an anti-stress agent in poultry after vaccinations.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

HPLC of Formula: 100-54-9《Two-Dimensional Anisotropic Flexibility of Mechanically Responsive Crystalline Cadmium(II) Coordination Polymers》 was published in 2022. The authors were Pisacic, Mateja;Kodrin, Ivan;Trninic, Amanda;Djakovic, Marijana, and the article was included in《Chemistry of Materials》. The author mentioned the following in the article:

Crystals of a family of six one-dimensional (1D) coordination polymers of cadmium(II) with cyanopyridines ([CdX₂L₂]_n; X = Cl, Br, I; L = 3-cyanopyridine, 3-CNpy, 4-cyanopyridine, 4-CNpy) presented a variety of morphologies and mech. responses with dominant 2D-anisotropic flexibility, which has not been previously reported. All mech. adaptable crystals were 2D flexible and they displayed a variety of direction-dependent responses; in addition to 2D-isotropic flexibility observed for solely elastic materials, 2D-anisotropic flexibility was noticed for both elastic and elastic → plastic crystals. The consequences of fine and controlled structural variations on mech. behavior were addnl. explored via microfocus SCXRD and complementary theor. studies, revealing that the relative strength and direction of the hydrogen bonding interactions were the key parameters in delivering a specific mech. response. The experimental procedure involved many compounds, such as 3-Cyanopyridine (cas: 100-54-9) .

3-Cyanopyridine(cas: 100-54-9) is an antimicrobial agent that can be used in the treatment of infectious diseases.HPLC of Formula: 100-54-9 It has been shown to be effective against a variety of bacteria, including methicillin-resistant Staphylococcus aureus (MRSA) and Streptococcus pneumoniae.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C6H4N2In 2022, Puzari, Amlan;Borah, Debajit;Das, Pankaj published 《Binuclear Pd(II) complexes with multidentate Schiff base ligands: synthesis, catalysis, and antibacterial properties》. 《Monatshefte fuer Chemie》published the findings. The article contains the following contents:

Abstract: Three new binuclear palladium(II) complexes with multidentate Schiff base ligands were synthesized and characterized by FTIR, UV-visible, ¹H-NMR, ESI-MS, and CHN anal. The complexes were successfully applied as catalysts for hydration of nitriles to amides. Using one of the complexes, a wide range of aryl/heteroaryl nitriles were efficiently converted to corresponding amides in moderate-to-excellent yields with low catalyst loading (0.8 mol%). In addition, the complexes were also tested for antibacterial activity against two gram-pos. and two gram-neg. bacteria using Kirby Bauer’s disk diffusion method. However, to the authors’ surprise, among the three complexes, only one complex showed growth inhibitory effect against gram-pos. bacteria, Bacillus subtilis, for which min. inhibitory concentration (MIC) is 30μg cm^-3. The experimental procedure involved many compounds, such as 3-Cyanopyridine (cas: 100-54-9) .

3-Cyanopyridine(cas: 100-54-9) has been shown to have a number of pharmacological effects: it inhibits the production of prostaglandin E2 and nitric oxide in congestive heart failure patients; it prevents the formation of diazonium salt from benzene and nitrogen dioxide; it inhibits the growth of tumor cell lines; and it protects mice from radiation injury by scavenging reactive oxygen species. COA of Formula: C6H4N2

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of C6H4N2In 2021, Harmange Magnani, Claire S.;Maimone, Thomas J. published 《Dearomative Synthetic Entry into the Altemicidin Alkaloids》. 《Journal of the American Chemical Society》published the findings. The article contains the following contents:

Altemicidin and related Streptomyces-derived monoterpene alkaloids possess dense, highly polar azaindane cores as well as potent cytotoxic and tRNA synthetase inhibitory properties. The congested α-amino acid motif decorating their presumed iridoid-like core structure has proven to be both a synthetic challenge and a biosynthetic mystery to date. Herein, we report a distinct, abiotic strategy to these alkaloids resulting in a concise synthesis of altemicidin from simple chem. feedstocks. Key chem. findings include the exploitation of a dearomative pyridinium addition and dipolar cycloaddition sequence to stereospecifically install the quaternary amine moiety, and a chemoselective molybdenum-mediated double reduction to establish the fully functionalized azaindane nucleus with minimal redox manipulations.3-Cyanopyridine (cas: 100-54-9) were involved in the experimental procedure.

3-Cyanopyridine(cas: 100-54-9) is an antimicrobial agent that can be used in the treatment of infectious diseases.Synthetic Route of C6H4N2 It has been shown to be effective against a variety of bacteria, including methicillin-resistant Staphylococcus aureus (MRSA) and Streptococcus pneumoniae.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Efe, Sevval;Schauerte, Carsten;Merz, Klaus published 《Crystal Engineering under Hydrothermal Conditions: Cocrystals and Reactions of 3-Cyanopyridine with Glutaric Acid》 in 2022. The article was appeared in 《Crystal Growth & Design》. They have made some progress in their research.COA of Formula: C6H4N2 The article mentions the following:

Crystallization under hydrothermal conditions is an interesting method to selectively influence crystallization pathways and processes. Crystallization of 3-cyanopyridine and glutaric acid from aqueous solutions under ambient conditions leads to the 2:1 cocryst. entity 1 of 3-cyanopyridine and glutaric acid. Crystallizations under thermal and hydrothermal conditions lead, depending on the amounts of water used, to both the polymorphic forms 1 and 2 of the 2:1 cocryst. entity of 3-cyanopyridine and glutaric acid and furthermore to the cocryst. entity nicotinamide and glutaric acid. To complete the study, the researchers used 3-Cyanopyridine (cas: 100-54-9) .

3-Cyanopyridine(cas: 100-54-9) has been shown to have a number of pharmacological effects: it inhibits the production of prostaglandin E2 and nitric oxide in congestive heart failure patients; it prevents the formation of diazonium salt from benzene and nitrogen dioxide; it inhibits the growth of tumor cell lines; and it protects mice from radiation injury by scavenging reactive oxygen species. COA of Formula: C6H4N2

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Today I want to share an article with you. The article is 《Transition-Metal-Free Regioselective Direct C2, C4 Difunctionalization and C2, C4, C6 Trifunctionalization of Pyridines》,you can find this article in 《Advanced Synthesis & Catalysis》. The following contents are mentioned:

This study reports the invention of di- or trifunctionalization of readily available pyridines (including all the pyridine substrates utilized in this paper, such as 3-cyanopyridine and 3-chloropyridine) through dearomative functionalization-oxidative rearomatization under transition-metal- and reductant-free conditions. Although a two-step operation is required, the crude product of the first step could be used in the next step directly. Typically, 3-π-EWG pyridines underwent difunctionalization, whereas 3-σ-EWG pyridines participate in trifunctionalization, affording multisubstituted piperidines. Computational studies provide detailed insights for their distinct reactivity in the title reaction. To complete the study, the researchers used 3-Cyanopyridine (cas: 100-54-9) .

3-Cyanopyridine(cas: 100-54-9) has been shown to have a number of pharmacological effects: it inhibits the production of prostaglandin E2 and nitric oxide in congestive heart failure patients; it prevents the formation of diazonium salt from benzene and nitrogen dioxide; it inhibits the growth of tumor cell lines; and it protects mice from radiation injury by scavenging reactive oxygen species. Electric Literature of C6H4N2

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Paoletti, Fabiola;Sdogati, Stefano;Barola, Carolina;Giusepponi, Danilo;Moretti, Simone;Galarini, Roberta published 《Two-procedure approach for multiclass determination of 64 antibiotics in honey using liquid chromatography coupled to time-of-flight mass spectrometry》. The research results were published in《Food Control》 in 2022.COA of Formula: C10H9ClN4O2S The article conveys some information:

A “two-procedure approach” was developed to detect and confirm residues of 64 antibiotic substances in honey using liquid-chromatog. coupled to quadrupole time-of-flight mass spectrometry. Eight antimicrobial classes were determined (amphenicols, lincosamides, macrolides, nitroimidazoles, pleuromutilins, quinolones, sulfonamides and tetracyclines) together with single drugs. The procedures were validated in the range 0.2-50μg kg-1, obtaining recovery factors from 67 to 100% and coefficients of variation in within-lab reproducibility conditions lower than 20%. Limits of detection and quantification were in the ranges 0.1-3.3μg kg-1 and 0.2-11μg kg-1, resp., satisfying the current European levels for anal. control of antibiotic residues in honey. An extensive matrix effect study was performed considering acacia, chestnut and multiflower honey types. Method performances were confirmed through participation in proficiency tests obtaining z-scores between -0.7 and +1.08. The proposed approach was applied to honey samples collected in local markets and three out of fifty-five samples tested pos. The found mols. were sulfonamides (sulfamethazine and sulfathiazole) and tetracyclines (oxytetracycline and tetracycline) at concentrations lower than 2μg kg-1. Two out of three contaminated samples contained honey from extra-EU countries.4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide (cas: 80-32-0) were involved in the experimental procedure.

4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide(cas: 80-32-0) can be introduced in the drinking water to fabricate aqueous liquid formulations for combating bacterial and protozoal in animals.COA of Formula: C10H9ClN4O2S Besides, sulfachloropyridazine associated to tripelennamine hydrocholoride has been demonstrated to function as an anti-stress agent in poultry after vaccinations.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem