Day: September 21, 2022

Lecroq, William;Schleinitz, Jules;Billoue, Mallaury;Perfetto, Anna;Gaumont, Annie-Claude;Lalevee, Jacques;Ciofini, Ilaria;Grimaud, Laurence;Lakhdar, Sami published 《Metal-Free Deoxygenation of Amine N-Oxides: Synthetic and Mechanistic Studies》. The research results were published in《ChemPhysChem》 in 2021.Computed Properties of C6H4N2 The article conveys some information:

An unprecedented combination of light and P(III)/P(V) redox cycling for the efficient deoxygenation of aromatic amine N-oxides was reported. Moreover, a large variety of aliphatic amine N-oxides was easily deoxygenated by using only phenylsilane. These practically simple approaches proceeded well under metal-free conditions, tolerated many functionalities and were highly chemoselective. Combined exptl. and computational studies enabled a deep understanding of factors controlling the reactivity of both aromatic and aliphatic amine N-oxides. 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. Computed Properties of C6H4N2

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

He, Tong;Cui, Peng Lei;Liu, Jing;Feng, Cheng;Wang, Jian Ping published 《Production of a Natural Dihydropteroate Synthase and Development of a Signal-Amplified Pseudo-Immunoassay for the Determination of Sulfonamides in Pork》 in 2022. The article was appeared in 《Journal of Agricultural and Food Chemistry》. They have made some progress in their research.Name: 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide The article mentions the following:

In this study, a type of magnetic photoaffinity-labeled activity-based protein profiling probe for sulfonamide drugs was first synthesized for the purpose of capturing the natural dihydropteroate synthase of Escherichia coli by using simple incubation and magnetic separation After characterization of its identity with LC-ESI-MS/MS, this enzyme was used as a recognition reagent to develop a direct competitive pseudo-ELISA for the determination of the residues of 40 sulfonamides in pork. Because of the use of streptavidin-horseradish peroxidase and biotinylated horseradish peroxidase as a signal-amplified system, the limits of detection for the 40 drugs were in the range of 0.001-0.016 ng/mL. Compared to the steps in a conventional assay formation, the operation steps were the same, but the sensitivities increased 32-88-fold. Furthermore, the assay performances were better than the previously reported immunoassays performances for sulfonamides. Therefore, this method could be used as a practical tool for multiscreening the trace levels of sulfonamides residues in food samples. 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.Name: 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

Qiu, Shanguang;Chen, Yuxue;Song, Xinming;Liu, Li;Liu, Xi;Wu, Luyong published 《Potassium tert -Butoxide Promoted Synthesis of 4,5-Diaryl-2 H -1,2,3-triazoles from Tosylhydrazones and Nitriles》. The research results were published in《Synlett》 in 2021.Electric Literature of C6H4N2 The article conveys some information:

Intermol. cycloaddition of tosylhydrazones with nitriles was investigated. T-BuOK was shown to be an excellent base for increasing the effectiveness of the reaction in this protocol and homocoupling of the tosylhydrazones was significantly inhibited by using xylene as a solvent. Through this transformation, a variety of 4,5-diaryl-2 H-1,2,3-triazoles I [R¹ = Ph, 4-MeC₆H₄, 4-ClC₆H₄, etc.; R² = Ph, 3-BrC₆H₄, 2-thienyl, etc.] were prepared in good to excellent yields and with high purities. The process was azide-free and transition-metal-free.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.Electric Literature 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

Han, Yu;Hu, Li-Xin;Liu, Ting;Liu, Jing;Wang, Yu-Qing;Zhao, Jia-Hui;Liu, You-Sheng;Zhao, Jian-Liang;Ying, Guang-Guo published 《Non-target, suspect and target screening of chemicals of emerging concern in landfill leachates and groundwater in Guangzhou, South China》 in 2022. The article was appeared in 《Science of the Total Environment》. They have made some progress in their research.Computed Properties of C10H9ClN4O2S The article mentions the following:

Landfill sites have been regarded as a significant source of chems. of emerging concern (CECs) in groundwater. However, our understanding about the compositions of CECs in landfill leachate and adjacent groundwater is still very limited. Here we investigated the CECs in landfill leachates and groundwater of Guangzhou in South China by target, suspect and non-target anal. using high-resolution mass spectrometry (HRMS). A variety of CECs (n = 242), including pharmaceuticals (n = 64), pharmaceutical intermediates (n = 18), personal care products (n = 9), food additives (n = 18), industrial chems. (n = 82, e.g., flame retardants, plasticizers, antioxidants and catalysts), pesticides (n = 26), transformation products (n = 8) and other organic compounds (n = 17) were (tentatively) identified by non-target and suspect screening. 142 CECs were quantitated with target anal., and among them 37, 24 and 27 CECs were detected resp. in the raw leachate (272-1780μg/L), treated leachate (0.25-0.81μg/L) and groundwater (0.10-53.7μg/L). The CECs in the raw leachates were efficiently removed with the removal efficiencies greater than 88.7%. Acesulfame, bisphenol F and ketoprofen were the most abundant compounds in both treated leachate and groundwater. The CECs in groundwater was found most likely to be originated from the landfill sites. Our results highlight the importance of non-target screening in identifying CECs, and reveal the contamination risk of groundwater by landfill leachate.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.Computed Properties of 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

Chen, Yiqin;Wen, Ju;Wu, Meng;Li, Juan-Ying;Wang, Qian;Yin, Jie published 《In situ application of the diffusive gradients in thin film technique in aquaculture ponds for monitoring antibiotics, hormones, and herbicides》 in 2022. The article was appeared in 《Environmental Science and Pollution Research》. They have made some progress in their research.COA of Formula: C10H9ClN4O2S The article mentions the following:

In recent years, as the abuse of antibiotics, hormones, and herbicides has worsened in aquaculture industry, it is important to monitor the concentrations of those trace contaminants in aquaculture water more effortlessly. The aim of this study was to develop a reliable sampling method for chem. monitoring in aquaculture ponds based on the technique of diffusive gradients in thin films (DGT). A binding material (XDA-1 resin) with high adsorption capacity for antibiotics, hormones, and herbicides was selected. In laboratory, the diffusion coefficients of 11 antibiotics, 3 hormones, and 3 herbicides of the XDA-1-DGT devices were tested and ranged from 1.0×10-6 to 8.7×10-5 cm2/s. During the in situ application of XDA-1-DGT devices in different aquaculture ponds, concentrations of 11 antibiotics, 3 hormones, and 3 herbicides in aquaculture water (CSOLN) via grab sampling were also analyzed and found ranging from 0.03 to 6.3 ng/L, lower than the results based on DGT (CDGT) (1.2-1.3×102 ng/L). The values of CDGT/CSOLN were larger than one unit, suggesting that the rates of resupply of target chems. (antibiotics, hormones, and herbicides) by the desorption and diffusion of pond water were higher than the rates of uptake by XDA-1-DGT, and pond water was proved a sufficient reservoir of antibiotics for DGT application. The value of Log (CDGT/CSOLN) of 1.1 derived from the application in the aquaculture ponds of 14 regions in Eastern China can be a reference value for future chem. monitoring based on DGT technique. And the accuracy of this value was found hardly affected by the phys. and chem. properties of chems. with pKa ranging from -1 to 12, Log Kow ranging from 0 to 4.5, and Log solubility ranging from 0.0 to 4.0. To complete the study, the researchers used 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide (cas: 80-32-0) .

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

Application of 100-54-9In 2021, Zhuo, Liang;Xie, Shihua;Wang, Hui;Zhu, Hongjun published 《Aerobic Visible-Light Induced Intermolecular S-N Bond Construction: Synthesis of 1,2,4-Thiadiazoles from Thioamides under Photosensitizer-Free Conditions》. 《European Journal of Organic Chemistry》published the findings. The article contains the following contents:

Aerobic visible-light induced intermol. S-N bond construction has been achieved without the addition of photosensitizer, metal, or base. With this strategy, 1,2,4-thiadiazoles I (R = Ph, 4-methoxyphenyl, thiophen-3-yl, etc.; R¹ = 4-methoxyphenyl, 2,6-dimethylphenyl, thiophen-2-yl, etc.) can be obtained from thioamides R/R¹C(S)NH₂. Preliminary mechanistic investigation suggested that the excited state of thioamides undergoes a single-electron-transfer (SET) process to afford thioamidyl radicals, which can be further transformed into a 1,2,4-thiadiazole through desulfurization and oxidative cyclization. The reaction has good functional group tolerance and represents a green method for the construction of S-N bonds.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.Application of 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

Rao, P. Purnachandra;Nowshuddin, Shaik;Jha, Anjali;Rao, B. Leela Maheswara;Divi, Murali K.;Rao, M. N. A. published 《Bis-morpholinophosphorylchloride, a novel reagent for the conversion of primary amides into nitriles》. The research results were published in《Tetrahedron Letters》 in 2021.COA of Formula: C6H4N2 The article conveys some information:

Bis-morpholinophosphorylchloride(Bmpc),in the presence of a base,was an efficient dehydrating agent for both aromaticand aliphatic primary amides, and gives corresponding nitriles under mild conditions in good yields and purity. During the reaction the enantiomeric integrity remains intact. And 3-Cyanopyridine (cas: 100-54-9) was used in the research process.

3-Cyanopyridine(cas: 100-54-9) also shows biological activity against autoimmune diseases, such as murine hepatitis, by inhibiting the proliferation of B cells and T cells.COA of Formula: C6H4N2 This drug is not effective against cancer cells because it does not inhibit DNA synthesis or protein synthesis.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Guo, Leilei;Yang, Wenlong;Cheng, Xi;Fan, Zhixia;Chen, Ximeng;Ge, Feng;Dai, Yijun published 《Degradation of neonicotinoid insecticide acetamiprid by two different nitrile hydratases of Pseudaminobacter salicylatoxidans CGMCC 1.17248》. The research results were published in《International Biodeterioration & Biodegradation》 in 2021.Quality Control of 3-Cyanopyridine The article conveys some information:

Acetamiprid is a neonicotinoid insecticide used worldwide that has caused environmental pollution and adverse effects on ecosystems. Here, a novel bacterium, Pseudaminobacter salicylatoxidans CGMCC 1.17248, was isolated to rapidly degrade acetamiprid to IM-1-2 via hydration. Gene cloning and overexpression demonstrated that two nitrile hydratases, AnhA and AnhB, converted acetamiprid to IM-1-2. Escherichia coli overexpressing AnhA and AnhB degraded 98.1% and 94.0% of acetamiprid (1.0 mmol L^-1) in 5 min and 8 h, resp. The pure AnhA and AnhB had a V_max value of 14.12 and 1.20 μmol mg^-1 min^-1, resp., and a Km value of 1.02 mmol L^-1 and 2.95 mmol L^-1, resp. Compared with AnhA, AnhB had broad pH stability, as well as metal ions and organic solvents tolerance. Expression of AnhA and AnhB was induced by decreasing the nutrient concentration of culture broth and addition of urea and therefore significantly enhanced acetamiprid degradation of CGMCC 1.17248. qPCR indicated that the expression of AnhA and AnhB under the cultured conditions of 1/15 lysogeny broth or 0.5% urea addition was improved by from 2.2 to 5.3 times. The results presented herein will facilitate development of bioremediation agents for acetamiprid pollution and understanding of the functional role of bacterial nitrile hydratase.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.Quality Control of 3-Cyanopyridine 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

Formula: C10H9ClN4O2S《Antibiotic exposure and potential risk of depression in the Chinese elderly: a biomonitoring-based population study》 was published in 2021. The authors were Liu, Xinji;Zhang, Jingjing;Sang, Yanru;Liu, Kaiyong;Zhu, Yitian;Yang, Linsheng;Wang, Sufang;Sheng, Jie;Wang, Qunan;Zhang, Dongmei;Cao, Hongjuan;Tao, Fangbiao, and the article was included in《Environmental Science and Pollution Research》. The author mentioned the following in the article:

To examine the associations between urinary antibiotics from various sources and depression in the elderly using the biomonitoring method. In the current study, we investigated 990 elderly individuals (≥ 60 years old) from a community-based elderly cohort in West Anhui, China. The participants were interviewed by the Geriatric Depression Scale and self-developed questionnaires. A total of 45 antibiotics belonging to nine categories were screened in urine samples by the developed liquid chromatog. electrospray tandem mass spectrometry method. Creatinine-corrected concentrations of antibiotics in urines were used to assess their exposure. Logistic regression anal. was employed to test the relationships between exposure to antibiotics and depression. Compared to the control group, the multinomial logistic regression analyses showed the elderly exposed to higher concentrations of azithromycin (OR = 1.81, 95% CI: 1.09-3.00) and sulfaclozine (OR = 1.54, 95% CI: 1.05-2.28) had increased risks of depression, resp. After categorizing the detected antibiotics, tetracyclines (OR = 1.48, 95% CI: 1.02-2.16) and veterinary antibiotics (VAs) (OR = 1.53, 95% CI: 1.06-2.20) were pos. correlated with increased risks of depression. After stratified by sex, the VAs (OR = 2.04, 95% CI: 1.13-3.71) at higher concentrations were associated with elevated risks of depression in males, while the associations between depression and antibiotic exposures were observed in tetracyclines (OR = 1.74, 95% CI: 1.04-2.85) and all antibiotics (OR = 2.24, 95% CI: 1.01-2.94) at higher levels in females, resp. Notably, after the stratification by age, the significant associations were mainly present in the subjects under the age of 70. Our findings reveal that azithromycin, sulfaclozine, tetracyclines, and the VAs were significantly associated with elevated risks of depression in the elderly. Importantly, sex- and age-specific differences were observed in the associations between antibiotic exposures and depression. 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.Formula: C10H9ClN4O2SDue to its antibiotic activity, this chemical has been selected as an ingredient to prepare antibacterial composition.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Product Details of 100-54-9《Proximity Effect in Uranyl Coordination of the Cucurbit[6]uril-Bipyridinium Pseudorotaxane Ligand for Promoting Host-Guest Synergistic Chelating》 was published in 2021. The authors were Li, Fei-ze;Geng, Jun-shan;Hu, Kong-qiu;Yu, Ji-pan;Liu, Ning;Chai, Zhi-fang;Mei, Lei;Shi, Wei-qun, and the article was included in《Inorganic Chemistry》. The author mentioned the following in the article:

The authors proposed regulating uranyl coordination behavior of cucurbituril-bipyridinium pseudorotaxane ligand by using meta-functionalized bipyridinium dicarboxylate guest. A tailored pseudorotaxane precursor involving 1,1′-(hexane-1,6-diyl)bis(3-cyanopyridin-1-ium) bromide (C6BPCN3) and cucurbit[6]uril (CB[6]) has been designed and synthesized. Through in situ hydrolysis of the pseudorotaxane ligands and their coordination assembly with uranyl cations, seven new uranyl-rotaxane coordination polymers URCP1-URCP7 were obtained under hydrothermal conditions in the presence of different anions. The variation of carboxylate groups from para- to meta-position affected the coordination of the meta-functionalized pseudorotaxane linkers, which are enriched from simple guest-only binding to host-guest simultaneous coordination and synergistic chelating. This effective regulation on uranyl coordination of supramol. pseudorotaxane can be attributed to the proximity effect, which refers to the meta-position carboxyl group being spatially closer to the portal carbonyl group of CB[6]. Also, by combining other regulation methods such as introducing competing counterions and modulating solution acidity, the nuclearity of the uranyl center and the coordination patterns of the pseudorotaxane ligand can be diversely tuned, which subsequently exert great influence on the final dimensionality of resultant uranyl compounds This work presents a large diversity of uranyl-based coordination polyrotaxane compounds with fascinating mech. interlocked components and, most importantly, provides a feasible approach to adjust and control the metal coordination behavior of the pseudorotaxane ligand that might expand the scope of application of such supramol. ligands.3-Cyanopyridine (cas: 100-54-9) were involved in the experimental procedure.

3-Cyanopyridine(cas: 100-54-9) also shows biological activity against autoimmune diseases, such as murine hepatitis, by inhibiting the proliferation of B cells and T cells.Product Details of 100-54-9 This drug is not effective against cancer cells because it does not inhibit DNA synthesis or protein synthesis.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem