Tag: 200-300

Zhang, Zhi-Bo;Duan, Yan-Ping;Zhang, Zhi-Jing;Tu, Yao-Jen;Luo, Peng-Cheng;Gao, Jun;Dai, Chao-Meng;Zhou, Lang published 《Multimedia fate model and risk assessment of typical antibiotics in the integrated demonstration zone of the Yangtze River Delta, China》. The research results were published in《Science of the Total Environment》 in 2022.Related Products of 80-32-0 The article conveys some information:

Due to the widespread consumption of antibiotics by humans and animals, antibiotic residues from human and animal excrements are released into the environment through domestic sewage and breeding wastewater, which ultimately affect the ecol. environment and human health. In this study, the concentrations of 10 antibiotics in the air, water, soil, and sediment from 2013 to 2019 in Qingpu District of the integrated demonstration zone of the Yangtze River Delta were predicated by developing a dynamic Level IV fugacity model. The influence of seasonal environmental factors (e.g., temperature, rainfall) on the distribution and migration of antibiotics in multi-media was also explored. The simulation results show that the 10 antibiotics mainly existed in water and sediment. The concentrations of antibiotics in air, water, soil, and sediment were 0-7.629 x 10^-14 ng/L, 1.187 x 10^-10-16.793 ng/L, 1.042 x 10^-14-3.500 x 10^-11 ng/g and 8.015 x 10^-12-14.188 ng/g, resp. It was also found that the increase in temperature and rainfall can reduce the migration rate of some antibiotics into the water and sediment phases. The flux anal. of the cross-media migration and transformation of antibiotics in Qingpu District shows that advection was the prime input and output paths of antibiotics in the water. Moreover, the prime input and output paths of antibiotics in sediment were sedimentation from water to sediment and degradation Sensitivity anal. shows that the characteristics of antibiotic emission, degradation rate, and Koc were the most influential parameters for target chems. The results of risk assessment based on Monte Carlo method reveal that the overall risk level of antibiotics in sediment was relatively risk-free, and the risk of antibiotics in water decreased in the order of tetracyclines > β-lactams > fluoroquinolones > macrolides > sulfonamides. 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.Related Products of 80-32-0 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

Recommanded Product: 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamideIn 2022, Jung, Young Sung;Kim, Dan-Bi;Nam, Tae Gyu;Seo, Dongwon;Yoo, Miyoung published 《Identification and quantification of multi-class veterinary drugs and their metabolites in beef using LC-MS/MS》. 《Food Chemistry》published the findings. The article contains the following contents:

The practice of abusing antibiotics to improve livestock growth poses a threat to food safety. To prevent and regulate this, accurate monitoring of residual veterinary drugs (VDs) is required. A method based on QuEChERS with dispersive solid-phase extraction for the determination of multi-class VDs was investigated using selected product ions under optimized multiple reaction monitoring conditions. During the clean-up procedure, chitosan, octadecyl silica, primary-secondary amine, and enhanced matrix removal (EMR)-lipid were evaluated for simultaneous anal. of multi-class VDs in beef matrix. The EMR sorbent was most advantageous (113/115) compared to others, and showed a satisfactory recovery range (70.7-117.9%) except cefquinome (67.3%) and cefalonium (69.8%). This methodol. can be used to detect oxolinic acid and ractopamine (27.4% and 88.0% of maximum residue limit, resp.) in real beef samples. We thus study propose a simple and fast anal. method for multi-class VDs for the future health of humans and animals.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.Recommanded Product: 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

Name: (R)-4-Phenyl-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole《Synthesis of bicyclic ethers by a palladium-catalyzed oxidative cyclization-redox relay-π-allyl-Pd cyclization cascade reaction》 was published in 2019. The authors were Lux, Michaelyn C.;Boby, Melissa L.;Brooks, Joshua L.;Tan, Derek S., and the article was included in《Chemical Communications (Cambridge, United Kingdom)》. The author mentioned the following in the article:

Bicyclic ether scaffolds are found in a variety of natural products and are of interest in probe and drug discovery. A palladium-catalyzed cascade reaction has been developed to provide efficient access to these scaffolds from readily available linear diene-diol substrates [e.g., I → II, (60% isolated) with complete cis-diastereoselectivity at ring junction and 4:1 dr (α/β) at vinyl side chain]. A Pd redox-relay process is used strategically to transmit reactivity between an initial oxypalladative cyclization and a subsequent π-allyl-Pd cyclization at remote sites. The reaction affords variety of bicyclic ether scaffolds with complete diastereoselectivity for cis-ring fusion.(R)-4-Phenyl-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole (cas: 1835671-08-3) 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 (R)-4-Phenyl-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole(cas: C15H11F3N2O) can also undergo this reaction.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Varenina, Ivana;Bilandzic, Nina;Luburic, Djurdjica Bozic;Kolanovic, Bozica Solomun;Varga, Ines published 《High resolution mass spectrometry method for the determination of 13 antibiotic groups in bovine, swine, poultry and fish meat: An effective screening and confirmation analysis approach for routine laboratories》. The research results were published in《Food Control》 in 2022.Quality Control of 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide The article conveys some information:

A screening and confirmatory method for the determination of 13 antibiotic groups including 91 substances was developed for muscle samples and validated using ultra-performance liquid chromatog. (UPLC) coupled to time-of-flight mass spectrometry. Optimization of the parameters was performed for every analyte and personal compound database library was created, comprising the mass spectra for following collision energies; 0, 10, 20 and 40 eV. Validation plan scheming and calculation of the parameters was performed using validation software, which included following performance characteristics; selectivity, trueness, precision, decision limit (CCα), detection capability (CCβ) and relative matrix effect. High resolution mass spectrometry operated in a narrow mass window and resolving power of 50,000 FWHM (2 GHz). Accurate mass measurements with mass accuracy below 10 ppm for all analytes were obtained in spiked muscle samples. The validation experiments showed good selectivity and specificity. The method was validated in the measurement range from 0.5 to 1000μg/kg, where a specific analyte mixed standard solution was prepared depending on the defined maximum residue limit (MRL) or lowest calibration level (LCL). For screening anal., detection capabilities (CCβ) below the set MRL values or at LCL concentration levels were defined. CCβ, as the concentration above which the sample can be considered suspect, ranged from 0.63 to 207.8μg/kg. For confirmation of the analyte, CCα was calculated at LCL or at the MRL, where it ranged from 0.38 to 14.3μg/kg for unauthorised substances and from 13.8 to 1492.6μg/kg for authorised substances. Relative within-laboratory reproducibility standard deviation ranged from 5.1 to 34.2%. Satisfactory z-score values in the range from -0.87 to 1.88 were obtained as a result of participating in four proficiency tests organized by European Union Reference Laboratories4-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.Quality Control 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

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

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

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

Gao, Lei;Wang, Peng;Chen, Zhongxiang;Tang, Shizhan;Wu, Song;Li, Gang;Qin, Dongli published 《Multi-pharmaceuticals analysis in fish by continuous series solid-phase extraction coupled with UPLC-MS/MS》. The research results were published in《Acta Chromatographica》 in 2022.Electric Literature of C10H9ClN4O2S The article conveys some information:

Pharmaceuticals which are widely used in aquatic can easily migrate into the environment and aquatic animals, and can increase the risk of drug resistance and allergic symptoms if consumed by humans. In order to achieve high-throughput anal. of pharmaceuticals with different phys. and chem. properties from complex matrixes, we developed a new method for various types pharmaceuticals in fish and shrimp tissue. Series solid-phase extraction (s-SPE) with different adsorbents was selected for extracting and purifying analytes with different paddings. s-SPE were combined with ultra performance liquid chromatog. triple quadruple tandem mass spectrometry (UPLC-MS/MS) for the detection of 30 pharmaceuticals antibiotics in fish samples. This method was stabilized and reliable to determinate the pharmaceuticals in fish and shrimp samples. As the method combined multiple Chinese national standards method, it could be easily treat the multi-pharmaceuticals from the fish and shrimp samples once time. It provided for both quant. and qual. methods and they could be applied to singleor multi-residue methods. The experimental procedure involved many compounds, such as 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide (cas: 80-32-0) .

4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide(cas: 80-32-0) is a sulfonamide antibiotic that is usually used as antibacterial anti-inflammatory drug, which has been applied in the treatment of acute urinary tract infections in childhood.Electric Literature of C10H9ClN4O2SDue to its antibiotic activity, this chemical has been selected as an ingredient to prepare antibacterial composition.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 80-32-0In 2021, Jia, Wei;Zhang, Min;Du, An;Zhang, Rong;Xu, Mudan;Shi, Lin published 《Accurate Quantification of Sulfonamide Metabolites in Goat Meat: A New Strategy for Minimizing Interaction between Sheep Serum Albumin and Sulfonamide Metabolites》. 《Journal of Agricultural and Food Chemistry》published the findings. The article contains the following contents:

To date, the determination of sulfonamide metabolites in animal-derived food has universal disadvantages of low throughput and no integrated metabolites involved. In this study, a powerful and reliable strategy for high-throughput screening of sulfonamide metabolites in goat meat was proposed based on an aqueous two-phase separation procedure (ATPS) combined with ultrahigh-performance liquid chromatog. quadrupole-Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap). Noncovalent interactions including van der Waals force, hydrogen bonding, and hydrophobic effect were determined to be staple interactions between the sulfonamide metabolites and sheep serum albumin by fluorescence spectroscopy and mol. docking technol., and an 80% acetonitrile-water solution/(NH₄)₂SO₄ was used as ATPS in order to release combined sulfonamide metabolites and minimize the influence of sheep serum albumin. Sulfonamide metabolites in the matrix were screened based on a mechanism of mass natural loss and core structure followed by identification combined with the pharmacokinetic. The developed strategy was validated according to EU standard 2002/657/EC with CCα ranging from 0.07 to 0.98μg kg^-1, accuracy recovery with 84-107%, and RSDs lower than 8.9%. Eighty seven goat meat samples were used for determination of 26 sulfonamides and 8 potential metabolites. On the basis of the established innovative process, this study has successfully implemented the comprehensive detection of sulfonamide metabolites, including N⁴-acetylated substitution, N⁴-hydroxylation, 4-nitroso, azo dimers, oxidized nitro, N⁴ monoglucose conjugation, β-D-glucuronide, and N-4-aminobenzenesulfonyl metabolites, which were shown to undergo oxidation, hydrogenation, sulfation, glucuronidation, glucosylation, and O-aminomethylation. 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) is a sulfonamide antibiotic that is usually used as antibacterial anti-inflammatory drug, which has been applied in the treatment of acute urinary tract infections in childhood.Application of 80-32-0Due to its antibiotic activity, this chemical has been selected as an ingredient to prepare antibacterial composition.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Name: 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamideIn 2021, Wenk, Jannis;Graf, Cornelia;Aeschbacher, Michael;Sander, Michael;Canonica, Silvio published 《Effect of Solution pH on the Dual Role of Dissolved Organic Matter in Sensitized Pollutant Photooxidation》. 《Environmental Science & Technology》published the findings. The article contains the following contents:

Dissolved organic matter (DOM) has a dual role in indirect phototransformations of aquatic contaminants by acting both as a photosensitizer and an inhibitor. Herein, the pH dependence of the inhibitory effect of DOM and the underlying mechanisms were studied in more than 400 kinetic irradiation experiments over the pH range of 6-11. Experiments employed various combinations of one of three DOM isolates, one of two model photosensitizers, the model antioxidant phenol, and one of nine target compounds (TCs), comprising several aromatic amines, in particular anilines and sulfonamides, and 4-cyanophenol. Using model photosensitizers without antioxidants, the phototransformation of most TCs increased with increasing pH, even for TCs for which pH did not affect speciation. This trend was attributed to pH-dependent formation yields of TC-derived radicals and their re-formation to the parent TC. Analogous trends were observed with DOM as a photosensitizer. Comparison of model and DOM photosensitizer data sets showed increasing inhibitory effects of DOM on TC phototransformation kinetics with increasing pH. In systems with anilines as a TC and phenol as a model antioxidant, pH trends of the inhibitory effect could be rationalized based on the reduction p.d. (ΔEred) of phenoxyl/phenol and anilinyl/aniline couples. Our results indicate that the light-induced transformation of aromatic amines in the aquatic environment is governed by the pH-dependent inhibitory effects of antioxidant phenolic moieties of DOM and pH-dependent processes related to the formation of amine oxidation intermediates. 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) is a sulfonamide antibiotic that is usually used as antibacterial anti-inflammatory drug, which has been applied in the treatment of acute urinary tract infections in childhood.Name: 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamideDue to its antibiotic activity, this chemical has been selected as an ingredient to prepare antibacterial composition.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem