Category: pyridine-derivatives

Duan, Jun;Chen, Long;Ji, Haodong;Li, Peishen;Li, Fan;Liu, Wen published 《Activation of peracetic acid by metal-organic frameworks (ZIF-67) for efficient degradation of sulfachloropyridazine》 in 2022. The article was appeared in 《Chinese Chemical Letters》. They have made some progress in their research.Reference of 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide The article mentions the following:

Peracetic acid (PAA)-based system is becoming an emerging advanced oxidation process (AOP) for effective removal of organic contaminants from water. Various approaches have been tested to activate PAA, while no previous researches reported the application of metal-organic frameworks (MOFs) materials for PAA activation. In this study, zeolitic imidazole framework (ZIF)-67, a representative MOFs, was facile synthesized via direct-mixing method at room temperature, and tested for PAA activation and sulfachloropyridazine (SCP) degradation The as-synthesized ZIF-67 exhibited excellent performance for PAA activation and SCP degradation with 100% of SCP degraded within 3 min, owing to the specific MOFs structure and abundant Co²⁺ sites. The pseudo-first-order kinetic model was applied to fit the kinetic data, with rate constant k1 of ZIF-67 activated PAA system 34.2 and 156.5 times higher than those of conventional Co₃O₄ activated PAA and direct oxidation by PAA. Radical quenching experiments and ESR (EPR) anal. indicated that CH₃C(O)OO· played a major role in this PAA activation system. Then, the Fukui index based on d. functional theory (DFT) calculation was used to predict the possible reaction sites of SCP for electrophilic attack by CH₃C(O)OO·. In addition, the degradation pathway of SCP was proposed based on Fukui index values and intermediates detection, which mainly included the S-N bond cleavage and SO₂ extrusion and followed by further oxidation, dechlorination, and hydroxylation. Therefore, ZIF-67 activated PAA is a novel strategy and holds strong potential for the removal of emerging organic contaminants (EOCs) from water. 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) 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

Category: pyridine-derivatives《Millimeter-Scale Zn(3-ptz)₂ Metal-Organic Framework Single Crystals: Self-Assembly Mechanism and Growth Kinetics》 was published in 2021. The authors were Garcia-Garfido, Juan M.;Enriquez, Javier;Chi-Duran, Ignacio;Jara, Ivan;Vivas, Leonardo;Hernandez, Federico J.;Herrera, Felipe;Singh, Dinesh P., and the article was included in《ACS Omega》. The author mentioned the following in the article:

The solvothermal synthesis of metal-organic frameworks (MOFs) often proceeds through competing crystallization pathways, and only partial control over the crystal nucleation and growth rates is possible. It challenges the use of MOFs as functional devices in free-space optics, where bulk single crystals of millimeter dimensions and high optical quality are needed. We develop a synthetic protocol to control the solvothermal growth of the MOF [Zn(3-ptz)₂]_n (MIRO-101), to obtain large single crystals with projected surface areas of up to 25 mm² in 24 h, in a single reaction with in situ ligand formation. No addnl. cooling and growth steps are necessary. We propose a viable reaction mechanism for the formation of MIRO-101 crystals under acidic conditions, by isolating intermediate crystal structures that directly connect with the target MOF and reversibly interconverting between them. We also study the nucleation and growth kinetics of MIRO-101 using ex situ crystal image anal. The synthesis parameters that control the size and morphol. of our target MOF crystal are discussed. Our work deepens our understanding of MOF growth processes in solution and demonstrates the possibility of building MOF-based devices for future applications in optics. To complete the study, the researchers used 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.Category: pyridine-derivatives 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

Carvalho, Fernando Marques;So, Yuri Alves de Oliveira;Wernik, Alessandra Sofia Kiametis;Silva, Monica de Abreu;Gargano, Ricardo published 《Accurate acid dissociation constant (pK_a) calculation for the sulfachloropyridazine and similar molecules》 in 2021. The article was appeared in 《Journal of Molecular Modeling》. They have made some progress in their research.Safety of 4-Amino-N-(6-chloropyridazin-3-yl)benzenesulfonamide The article mentions the following:

Accurate calculation of the acid dissociation constant (pK_a) has fundamental importance for the description of mol. systems with pharmacol. activities. The search for a more appropriate procedure for its determination is always welcome and has aroused increasing interest from the scientific community. In this sense, this work presents a computational study involving the combination of ten DFT functionals (M062X, M06L, B3LYP, BLYP, PBEPBE, BP86, LC-BLYP, SPBE, CAM-B3LYP, LC-PBEPBE) and HF method, eight basis set functions (6-311G, 6-311 + G, 6-311G(d,p), 6-311 + G(d,p), 6-311+ +G(d,p), 6-311(2d,2p), 6-311+ +G(2d,2p), and aug-cc-pVDZ), and three solvation models (SMD, PCM, and CPCM) for an accurate sulfachloropyridazine (SCR) pK_a determination It was found that the smallest deviation (0.02 unit of pK_a) between the current study and exptl. result was achieved with the BLYP/6-311 + G(d,p)/PCM combination. Therefore, this combination was extended to calculate the pK_a of six SCR similar mols. selected through the eletroshape similarity method. For all these mols., the difference between the obtained results and exptl. data ranged between 0.14 and 0.69 units of pK_a. This feature suggests that the obtained combination can determine pK_a with exptl. precision for complexes that are formed by sulfonamide functional group (SO₂NHR).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) 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.Safety of 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

Name: 3-Cyanopyridine《Decarbonylative Synthesis of Aryl Nitriles from Aromatic Esters and Organocyanides by a Nickel Catalyst》 was published in 2021. The authors were Iizumi, Keiichiro;Kurosawa, Miki B.;Isshiki, Ryota;Muto, Kei;Yamaguchi, Junichiro, and the article was included in《Synlett》. The author mentioned the following in the article:

A decarbonylative cyanation of aromatic esters with aminoacetonitriles in the presence of a nickel catalyst were developed. The key to this reaction were the use of a thiophene-based diphosphine ligand, dcypt, permitting the synthesis of aryl nitrile without the generation of stoichiometric metal- or halogen-containing chem. wastes. A wide range of aromatic esters, including hetarenes and pharmaceutical mols., were converted into aryl nitriles. To complete the study, the researchers used 3-Cyanopyridine (cas: 100-54-9) .

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.Name: 3-Cyanopyridine This drug is not effective against cancer cells because it does not inhibit DNA synthesis or protein synthesis.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Safety of 3-Cyanopyridine《Site-Selective 1,4-Difunctionalization of Nitrogen Heteroaromatics for Constructing Vinylidene Heterocycles》 was published in 2022. The authors were He, Qianlin;Zhong, Mingli;Chen, Zhichao;Liao, Chuyi;Xie, Feng;Zhu, Zhongzhi;Chen, Xiuwen, and the article was included in《Advanced Synthesis & Catalysis》. The author mentioned the following in the article:

A one-pot protocol for constructing 1,4-difunctionalized quinoline/pyridine derivatives via the reaction of N-heteroaromatics, alkyl halides, and active methylene/methyl compounds was developed. The transformation involves dearomative functionalization of an in situ-activated N-heteroaromatic to construct new C-N and C=C bonds. This reaction has a broad substrate scope and functional group tolerance. And 3-Cyanopyridine (cas: 100-54-9) was used in the research process.

3-Cyanopyridine(cas: 100-54-9) is an antimicrobial agent that can be used in the treatment of infectious diseases.Safety 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

Nakajima, Ryota;Oono, Hiroyuki;Sugiyama, Sakae;Matsueda, Yohei;Ida, Tomohide;Kakuda, Shinji;Hirata, Jun;Baba, Atsushi;Makino, Akito;Matsuyama, Ryo;White, Ryan D.;Wurz, Ryan Ρ.;Shin, Youngsook;Min, Xiaoshan;Guzman-Perez, Angel;Wang, Zhulun;Symons, Antony;Singh, Sanjay K.;Mothe, Srinivasa Reddy;Belyakov, Sergei;Chakrabarti, Anjan;Shuto, Satoshi published 《Discovery of [1,2,4]Triazolo[1,5-a]pyridine Derivatives as Potent and Orally Bioavailable RORγt Inverse Agonists》 in 2020. The article was appeared in 《ACS Medicinal Chemistry Letters》. They have made some progress in their research.COA of Formula: C7H5BrClNO2 The article mentions the following:

The retinoic acid receptor-related orphan nuclear receptor γt (RORγt), a promising therapeutic target, is a major transcription factor of genes related to psoriasis pathogenesis such as interleukin (IL)-17A, IL-22, and IL-23R. On the basis of the X-ray cocrystal structure of RORγt with 1a, an analog of the known piperazine RORγt inverse agonist 1, triazolopyridine derivatives of 1 were designed and synthesized, and analog 3a was found to be a potent RORγt inverse agonist. Structure-activity relationship studies on 3a, focusing on the treatment of its metabolically unstable cyclopentyl ring and the central piperazine core, led to a novel analog, namely, 6-methyl-N-(7-methyl-8-(((2S,4S)-2-methyl-1-(4,4,4-trifluoro-3-(trifluoromethyl)butanoyl)piperidin-4-yl)oxy)[1,2,4]triazolo[1,5-a]pyridin-6-yl)nicotinamide (5a), which exhibited strong RORγt inhibitory activity and a favorable pharmacokinetic profile. Moreover, the in vitro and in vivo evaluation of 5a in a human whole-blood assay and a mouse IL-18/23-induced cytokine expression model revealed its robust and dose-dependent inhibitory effect on IL-17A production And Methyl 3-bromo-6-chloropicolinate (cas: 1214328-96-7) was used in the research process.

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 Methyl 3-bromo-6-chloropicolinate(cas: C7H5BrClNO2) can also undergo this reaction.

Reference:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C6H4N2《Switching Selectivity in Copper-Catalyzed Transfer Hydrogenation of Nitriles to Primary Amine-Boranes and Secondary Amines under Mild Conditions》 was published in 2022. The authors were Song, Hao;Xiao, Yao;Zhang, Zhuohua;Xiong, Wanjin;Wang, Ren;Guo, Liangcheng;Zhou, Taigang, and the article was included in《Journal of Organic Chemistry》. The author mentioned the following in the article:

A simple and efficient copper-catalyzed selective transfer hydrogenation of nitriles to primary amine-boranes I [R = n-Bu, Ph, cyclohexyl, etc.] and secondary amines R¹CH(R²)NHCH₂R³ [R¹ = Ph, 2-furyl, 1-naphthyl, etc.; R² = H, Me; R³ = Ph, 4-MeC₆H₄, 3-thienyl, etc.] with an oxazaborolidine-BH₃ complex was reported. The selectivity control was achieved under mild conditions by switching the solvent and the copper catalysts. More than 30 primary amine-boranes and 40 secondary amines were synthesized via this strategy in high selectivity and yields of up to 95%. The strategy was applied to the synthesis of ¹⁵N labeled in 89% yield.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.Electric Literature of 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

Wu, Ligui;Wei, Quantao;Zhang, Yingying;Fan, Yuxing;Li, Mi;Rong, Lingling;Xiao, Xiaoyu;Huang, Xiangfeng;Zou, Xiaoming published 《Effects of antibiotics on enhanced biological phosphorus removal and its mechanisms》. The research results were published in《Science of the Total Environment》 in 2021.SDS of cas: 80-32-0 The article conveys some information:

Many kinds of antibiotics are continuously discharged into wastewater and typically cause a great decrease in sewage treatment performance, whereas mechanisms of differences in the impacts of commonly used antibiotics on phosphate removal are still elusive. Thus, an enhanced biol. phosphorus removal (EBPR) system, as an effective method of phosphate removal, was developed, and its performance in the treatment of artificial wastewater containing antibiotics at short- (8 h) and long-term (15 days) exposure was investigated. The results show that phosphorus removal was consistently inhibited by the addition of antibiotics with a significant difference (P < 0.05). To interpret the phenomena, mechanistic equations were developed, and the results indicate that for short-term tests, the difference was mainly caused by the suppression of polyhydroxyalkanoate (PHA) degradation and the activity of polyphosphate kinase (PPK), resulting in the different inhibition of the soluble orthophosphorus (SOP) uptake process. For long-term tests, the difference in SOP uptake was principally caused by the inhibition of PHA degradation and the activity of PPK, whereas the difference in SOP release resulted from the inhibition of activities of exopolyphosphatase (PPX) and adenylate kinase (ADK). Moreover, micro-mechanisms of such inhibition were identified from mol. docking and electrostatic potential. 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.SDS of cas: 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

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

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