Pyridine-derivatives

Demonti, Luca; Saffon-Merceron, Nathalie; Mezailles, Nicolas; Nebra, Noel published the artcile< Cross-Coupling through Ag(I)/Ag(III) Redox Manifold>, Name: 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, the main research area is silver trifluoromethyl tervalent argentate preparation reductive elimination arylboronate; trifluoromethyl arene preparation coupling arylboronate trifluoromethylargentate reductive elimination; crystal mol optimized electronic structure tervalent trifluoromethyl argentate complex; AgIII chemistry; cross-coupling; fluorine; high-valent species; trifluoromethylation.

Trifluoromethyl argentates(III) undergo reductive elimination with arylboronic acids, yielding trifluoromethylarenes. In ample variety of transformations, the presence of silver as an additive or co-catalyst is believed to be innocuous for the efficiency of the operating metal catalyst. Even though Ag additives are required often as coupling partners, oxidants or halide scavengers, its role as a catalytically competent species is widely neglected in cross-coupling reactions. Most likely, this is due to the erroneously assumed incapacity of Ag to undergo 2e- redox steps. Definite proof is herein provided for the required elementary steps to accomplish the oxidative trifluoromethylation of arenes through AgI/AgIII redox catalysis (i. e. CEL coupling), namely: (i) easy AgI/AgIII 2e- oxidation mediated by air; (ii) bpy/phen ligation to AgIII; (iii) boron-to-AgIII aryl transfer; and (iv) ulterior reductive elimination of benzotrifluorides from an [aryl-AgIII-CF3] fragment. More precisely, an ultimate entry and full characterization of organosilver(III) compounds [K]+[AgIII(CF3)4]- (K-1), [(bpy)AgIII(CF3)3] (2) and [(phen)AgIII(CF3)3] (3), is described. The utility of 3 in cross-coupling has been showcased unambiguously, and a large variety of arylboron compounds was trifluoromethylated via [AgIII(aryl)(CF3)3]- intermediates. This work breaks with old stereotypes and misconceptions regarding the inability of Ag to undergo cross-coupling by itself.

Chemistry – A European Journal published new progress about Boronic acids, esters Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (arylboronates). 329214-79-1 belongs to class pyridine-derivatives, and the molecular formula is C11H16BNO2, Name: 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Beller, Matthias; Magerlein, Wolfgang; Indolese, Adriano F.; Fischer, Christine published the artcile< Efficient palladium-catalyzed alkoxycarbonylation of N-heteroaryl chlorides - A practical synthesis of building blocks for pharmaceuticals and herbicides. [Erratum to document cited in CA135:210917]>, Product Details of C6H6ClNO, the main research area is erratum butyl pyridinecarboxylate preparation; butyl pyridinecarboxylate preparation erratum; heteroaryl chloride alkoxycarbonylation palladium phosphine ligand catalyst erratum; alkoxycarbonylation chloropyridine palladium catalyst erratum.

The correct structures are given for Table 5, entry 3, product; Table 7, entry 1, product; Table 7, entry 2, product; and Table 7, entry 3, product.

Synthesis published new progress about Alkoxycarbonylation. 13472-84-9 belongs to class pyridine-derivatives, and the molecular formula is C6H6ClNO, Product Details of C6H6ClNO.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Sinwat, Nuananong; Witoonsatian, Kriangkrai; Chumsing, Suksan; Suwanwong, Monticha; Kankuntod, Somyod; Jirawattanapong, Pichai; Songserm, Thaweesak published the artcile< Antimicrobial Resistance Phenotypes and Genotypes of Salmonella spp. Isolated from Commercial Duck Meat Production in Thailand and Their Minimal Inhibitory Concentration of Disinfectants>, Recommanded Product: 1-Hexadecylpyridin-1-ium chloride, the main research area is Salmonella disinfectant antimicrobial resistance phenotype genotype duck meat; Salmonella enterica; antimicrobial resistance; disinfectant resistance; meat-type ducks.

Salmonella is an important foodborne bacterium that has become increasingly resistant to critical antimicrobial and disinfectant agents. The aim of this study was to characterize antimicrobial and disinfectant resistance of Salmonella spp. isolated from ducks raised for meat in Nakhon Pathom province, Thailand. A total of 694 fecal samples from ducks were collected in 2018. Of which, 85 samples were pos. for Salmonella (12.2%), and 12 Salmonella serovars were identified from 125 Salmonella isolates. The Altona serovar was the predominant serotype found in this study (36.5%). All isolates showed resistance to at least one class of antimicrobial, and 23.2% displayed multidrug resistance (MDR) phenotype. The blaTEM, aadA2, strA, and dfrA12 genes were detected in antibiotic-resistant strains of Salmonella, whereas the genes within a plasmid-borne qnr family that presented in fluoroquinolone-susceptible Salmonella strains were qnrB (3.8%) and qnrS (1.5%). The min. inhibitory concentrations of benzalkonium chloride (BKC), cetylpyridium chloride (CPC), and hexadecyltrimethyl ammonium bromide (CTAB) ranged between 128 and 512μgg/mL, while that of didecyldimethylammonium chloride (DDAC) was between 32 and 128μg/mL. The presences of qacEΔ1, mdfA, sugE(c), sugE(p), and ydgE genes were less prevalent (0.8-1.6%). Taken together, our results indicate that duck is an important source of Salmonella with antimicrobial resistance in food-producing animals. Active surveillance programs for antimicrobial and disinfectant resistance in duck production are needed for an early detection of resistance strains of public health importance.

Microbial Drug Resistance (New Rochelle, NY, United States) published new progress about Antimicrobial agent resistance. 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

Zhu, Huajian; Li, Wenlong; Shuai, Wen; Liu, Yang; Yang, Limei; Tan, Yuchen; Zheng, Tiandong; Yao, Hong; Xu, Jinyi; Zhu, Zheying; Yang, Dong-Hua; Chen, Zhe-Sheng; Xu, Shengtao published the artcile< Discovery of novel N-benzylbenzamide derivatives as tubulin polymerization inhibitors with potent antitumor activities>, Formula: C6H8N2, the main research area is colchicine binding antitumor safety profile; benzylbenzamide preparation cytotoxicity antitumor mol docking tubulin inhibitor; Anti-vascular; Antitumor; Druggability; N-benzylbenzamide; Tubulin inhibitors.

A series of novel N-benzylbenzamide derivatives I (R = dimethylaminyl, piperidin-1-yl, morpholin-4-yl, etc.; R1 = H, Cl, NO2, (pyridin-4-ylmethyl)aminyl, etc.; R2 = H, NO2; R3 = (3-hydroxy-4-methoxyphenyl)methyl, (3-fluoro-4-methoxyphenyl)methyl, pyridin-4-ylmethyl, etc.; R4 = H, Me), II (X = Y = N, CH) and III were designed and synthesized as tubulin polymerization inhibitors. Among fifty-one target compounds, I, II and III compound I [R = morpholin-4-yl; R1 = F; R2 = H; R3 = (3-hydroxy-4-methoxyphenyl)methyl; R4 = H] (IV) exhibited significant antiproliferative activities with IC50 values ranging from 12 to 27 nM against several cancer cell lines, and possessed good plasma stability and satisfactory physicochem. properties. Mechanism studies demonstrated that IV bound to the colchicine binding site and displayed potent anti-vascular activity. Notably, the corresponding disodium phosphate III exhibited an excellent safety profile with the LD50 value of 599.7 mg/kg (i.v. injection), meanwhile, it significantly inhibited tumor growth and decreased microvessel d. in liver cancer cell H22 allograft mouse model without obvious toxicity. Collectively, IV and III are novel promising anti-tubulin agents with more druggable properties and deserve to be further investigated for cancer therapy.

European Journal of Medicinal Chemistry published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Formula: C6H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Xie, Dongsheng; Lu, Jun; Xie, Jin; Cui, Junjun; Li, Teng-Fei; Wang, Yan-Chao; Chen, Yuan; Gong, Nian; Li, Xin-Yan; Fu, Lei; Wang, Yong-Xiang published the artcile< Discovery and analgesic evaluation of 8-chloro-1,4-dihydropyrido[2,3-b]pyrazine-2,3-dione as a novel potent D-amino acid oxidase inhibitor>, Recommanded Product: 5-Fluoropyridine-2,3-diamine, the main research area is chlorodihydro pyridopyrazine dione preparation amino acid oxidase inhibitor; 5-Azaquinoxaline-2,3-diones; 8-Chloro-1,4-dihydropyrido[2,3-b]pyrazine-2,3-dione; Analgesic effects; D-amino acid oxidase; DAAO inhibitors.

A series of 5-azaquinoxaline-2,3-dione derivatives were synthesized and evaluated on D-amino acid oxidase (DAAO) inhibition as potential α-hydroxylactam-based inhibitors. The potent inhibitory activities in vitro suggested that 5-nitrogen could significantly enhance the binding affinity by strengthening relevant hydrogen bond interactions. The analgesic effects of intrathecal and systemic injection of 8-chloro-1,4-dihydropyrido[2,3-b]pyrazine-2,3-dione, a representative mol. of 5-azaquinoxaline-2,3-dione, were investigated in rodents. This research not only confirmed the analgesic effect of the DAAO inhibitors but provided a new class of chem. entities with oral application potential for the treatment of chronic pain and morphine analgesic tolerance.

European Journal of Medicinal Chemistry published new progress about Analgesics. 212268-13-8 belongs to class pyridine-derivatives, and the molecular formula is C5H6FN3, Recommanded Product: 5-Fluoropyridine-2,3-diamine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Matsuo, Kenya; Yoshihara, Kumiko; Nagaoka, Noriyuki; Makita, Yoji; Obika, Hideki; Okihara, Takumi; Matsukawa, Akihiro; Yoshida, Yasuhiro; Van Meerbeek, Bart published the artcile< Rechargeable anti-microbial adhesive formulation containing cetylpyridinium chloride montmorillonite>, Electric Literature of 123-03-5, the main research area is cetylpyridinium chloride montmorillonite antimicrobial adhesive formulation; Adhesive; Antibacterial; Cetylpyridinium chloride (CPC); Montmorillonite; Recharge; S. mutans.

Long-term anti-bacterial effect is a desired ability of any dental material in combating tooth caries as one of the most common and widespread persistent diseases today. Among several cationic quaternary ammonium compounds with antiseptic properties, cetylpyridinium chloride (CPC) is often used in mouthrinses and toothpastes. In this study, we incorporated CPC in a soft phyllosilicate mineral (clay), referred to as montmorillonite (Mont), to enable gradual CPC release with rechargeability. Besides measuring CPC release and recharge, we examined the anti-bacterial effect, cytotoxicity and bonding effectiveness of five exptl. adhesive formulations, prepared by adding 1 and 3 wt% CPC_Mont, 3 wt% Mont (without CPC), and 1 and 3 wt% CPC (without Mont) to the com. adhesive Clearfil S3 Bond ND Quick (C-S3B; Kuraray Noritake). Strong inhibition of Streptococcus mutans biofilm formation by CPC_Mont adhesives was confirmed by optical d. and SEM. CPC release from CPC_Mont adhesives was higher and lasted longer than from CPC adhesives, while CPC_Mont adhesives could also be recharged with CPC upon immersion in 2 wt% CPC. In conclusion, CPC_Mont technol. rendered adhesives anti-bacterial properties with recharge ability, this without reducing its bonding potential, neither increasing its cytotoxicity. Dental caries is one of the most prevalent chronic diseases in the population worldwide and is the major cause of tooth loss. In this study, we developed cetylpyridinium chloride (CPC) loaded montmorillonite (CPC-Mont) with a long-term antibacterial efficacy to prevent caries. CPC is an antibacterial agent approved by FDA, used as an OTC drug and contained in oral hygiene aids. CPC-Mont was incorporated in a dental adhesive to gradually release CPC. CPC_Mont technol. rendered adhesives anti-bacterial properties with rechargeability, this without reducing its bonding potential, neither increasing its cytotoxicity.

Acta Biomaterialia published new progress about Adhesives. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Electric Literature of 123-03-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Donald, James R.; Berrell, Sophie L. published the artcile< Radical cyanomethylation via vinyl azide cascade-fragmentation>, Related Products of 370878-69-6, the main research area is azido alkenol alkyl nucleophile tandem radical photochem cyanomethylation; alkanenitrile preparation.

A novel methodol. for radical cyanomethylation was described. The process was initiated by radical addition to the vinyl azide reagent 3-azido-2-methylbut-3-en-2-ol which triggered a cascade-fragmentation mechanism driven by the loss of dinitrogen and the stabilized 2-hydroxypropyl radical, ultimately effecting cyanomethylation. Cyanomethyl group was efficiently introduced into a range of substrates via trapping of α-carbonyl, heterobenzylic, alkyl, sulfonyl and aryl radicals, generated from a variety of functional groups under both photoredox catalysis and non-catalytic conditions. The value of this approach was exemplified by the late-stage cyanomethylation of pharmaceuticals.

Chemical Science published new progress about Aliphatic nitriles Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 370878-69-6 belongs to class pyridine-derivatives, and the molecular formula is C33H21F3IrN3, Related Products of 370878-69-6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Jin-Biao; Wu, Chun; Chen, Feng; Leung, Chung-Hang; Ma, Dik-Lung published the artcile< A simple iridium(III) dimer as a switch-on luminescent chemosensor for carbon disulfide detection in water samples>, Application of C10H8N2, the main research area is iridium dimer luminescent chemosensor carbon disulfide water; Carbon disulfide; Chemosensor; Iridium(III) dimer; Luminescence.

A series of iridium(III) dimers were synthesized and their ability to interact with diethyldithiocarbamate for CS2 sensing was evaluated. Upon the addition of CS2, diethylamine can capture CS2 to form diethyldithiocarbamate, which could chelate with the iridium(III) dimer to form a diethyldithiocarbamate iridium(III) complex, resulting in a yellow luminescence. Dimer 8 exhibited a maximum 18-fold of luminescence enhancement upon the addition of CS2. The luminescence signal of the detection system could be readily distinguished from the highly fluorescent media using time-resolved emission spectroscopy (TRES). The capability of the system to determine CS2 level in water samples was also demonstrated.

Analytica Chimica Acta published new progress about Environmental analysis. 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Application of C10H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Smil, David; Wong, Jong Fu; Williams, Eleanor P.; Adamson, Roslin J.; Howarth, Alison; McLeod, David A.; Mamai, Ahmed; Kim, Soyoung; Wilson, Brian J.; Kiyota, Taira; Aman, Ahmed; Owen, Julie; Poda, Gennady; Horiuchi, Kurumi Y.; Kuznetsova, Ekaterina; Ma, Haiching; Hamblin, J. Nicole; Cramp, Sue; Roberts, Owen G.; Edwards, Aled M.; Uehling, David; Al-awar, Rima; Bullock, Alex N.; O’Meara, Jeff A.; Isaac, Methvin B. published the artcile< Leveraging an Open Science Drug Discovery Model to Develop CNS-Penetrant ALK2 Inhibitors for the Treatment of Diffuse Intrinsic Pontine Glioma>, Reference of 916791-62-3, the main research area is preparation ALK2 inhibitor diffuse intrinsic pontine glioma.

There are currently no effective chemotherapeutic drugs approved for the treatment of diffuse intrinsic pontine glioma (DIPG), an aggressive pediatric cancer resident in the pons region of the brainstem. Radiation therapy is beneficial but not curative, with the condition being uniformly fatal. Anal. of the genomic landscape surrounding DIPG has revealed that activin receptor-like kinase-2 (ALK2) constitutes a potential target for therapeutic intervention given its dysregulation in the disease. An open science approach has been adopted to develop a series of potent, selective, orally bioavailable, and brain-penetrant ALK2 inhibitors based on the lead compound LDN-214117. Modest structural changes to the C-3, C-4, and C-5 position substituents of the core pyridine ring afforded compounds M4K2009, M4K2117, and M4K2163, each with a superior potency, selectivity, and/or blood-brain barrier (BBB) penetration profile. Robust in vivo pharmacokinetic (PK) properties and tolerability mark these inhibitors as advanced preclin. compounds suitable for further development and evaluation in orthotopic models of DIPG.

Journal of Medicinal Chemistry published new progress about Activin receptor ACVRLK2 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 916791-62-3 belongs to class pyridine-derivatives, and the molecular formula is C5H2Cl2FN, Reference of 916791-62-3.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Azum, Naved; Rub, Malik Abdul; Alfaifi, Sulaiman Yahya; Asiri, Abdullah M. published the artcile< Interaction of diphenhydramine hydrochloride with cationic and anionic surfactants: mixed micellization and binding studies>, Product Details of C21H38ClN, the main research area is diphenhydramine hydrochloride cationic anionic surfactant mixed micellization binding study; binding studies; cetylpyridinium chloride; diphenhydramine hydrochloride; mixed micellization; sodium dodecyl sulfate.

The focus of the present work is to evaluate the interactions of an anti-allergic drug (diphenhydramine hydrochloride, DPH) with anionic (sodium dodecyl sulfate, SDS) and cationic (cetylpyridinium chloride, CPC) surfactants in the aqueous medium. The mixed micellization behavior and surface properties of drug-surfactant mixtures have been examined by surface tension measurements. Various theor. approaches were applied to explore the synergistic or non-ideal behavior of the current mixed systems. Furthermore, the binding studies of drug with surfactants have been elaborated by UV-visible spectroscopy. Benesi-Hildebrand (B-H) theory was used to compute stoichiometric ratio, binding constant, and free energy change for the drug-surfactant mixtures The outputs are deliberated taking into consideration the use of surfactants as capable drug delivery agents for DPH and hence advance bioavailability.

Polymers (Basel, Switzerland) published new progress about Absorption spectra. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Product Details of C21H38ClN.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem