Pyridine-derivatives

Li, Bin; Yan, Qing-Qing; Yong, Guo-Ping published the artcile< Crystal structures and properties of four coordination polymers based on a new asymmetric ligand: Tuning structure/dimensionality by various organic solvents>, COA of Formula: C7H7NO, the main research area is cobalt nickel zinc cadmium bipyridinediyldibenzoato complex preparation crystal structure; photoluminescence magnesium cobalt nickel zinc cadmium bipyridinediyldibenzoato complex.

An asym. ligand, 4,4′-([2,3′-bipyridine]-4,6-diyl)dibenzoic acid (H2L) was successfully used to construct four new coordination polymers, [M(HL)2]n (M = Cd (1), Co (2), Zn (3)) and [Ni(L)(H2O)2]n·H2O (4), which were solvothermally synthesized and structurally characterized. In coordination polymers 1-4, two ligands bridge two metal centers through carboxylate oxygen atoms and pyridyl nitrogen atoms to form a rhombic grid motif. Amongst, each rhombic grid connects to adjacent ones through the metal nodes to construct spirolike 1-dimensional chain of 1-3 with the partially deprotonated 2-connected HL- ligands, whereas, the completely deprotonated 3- connected L2- ligands make rhombic grids construct 2-dimensional network of 4. The various structure/dimensionality of 1-4 essentially originates from the types of organic solvents, because dipolar DMF solvent results in complete deprotonated L2- in 4, conversely, polar NMP and MeCN only cause partial deprotonation of ligand in 1-3. An enhanced luminescence appears in 1 and 3, compared to H2L ligand, while 2 and 4 reveal antiferromagnetic behaviors. Also, the sensing experiments indicate that 1 and 3 possess luminescent quenching effects on sensing nitrobenzene. This work provides a promising approach to design and construct new coordination polymers with tunable structure/dimensionality by using different organic solvents.

Inorganica Chimica Acta published new progress about Antiferromagnetic exchange. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, COA of Formula: C7H7NO.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Kaixin; Bai, Linlu; Amaniampong, Prince Nana; Jia, Xinli; Lee, Jong-Min; Yang, Yanhui published the artcile< One-Pot Transformation of Cellobiose to Formic Acid and Levulinic Acid over Ionic-Liquid-based Polyoxometalate Hybrids>, Application of C9H13NO3S, the main research area is ionic liquid polyoxometalate catalyst cellobiose hydrolysis oxidation rehydration; formic levulinic acid synthesis catalyst; biomass; hydrolysis; polyoxometalates; reaction mechanism; rehydration.

Currently, levulinic acid (LA) and formic acid (FA) are considered as important carbohydrates for the production of value-added chems. Their direct production from biomass will open up a new opportunity for the transformation of biomass resource to valuable chems. In this study, one-pot transformation of cellobiose into LA and FA was demonstrated, using a series of multiple-functional ionic liquid-based polyoxometalate (IL-POM) hybrids as catalytic materials. These IL-POMs not only markedly promoted the production of valuable chems. including LA, FA and monosaccharides with high selectivities, but also provided great convenience of the recovery and the reuse of the catalytic materials in an environmentally friendly manner. Cellobiose conversion of 100 %, LA selectivity of 46.3 %, and FA selectivity of 26.1 % were obtained at 423 K and 3 MPa for 3 h in presence of oxygen. A detailed catalytic mechanism for the one-pot transformation of cellobiose was also presented.

ChemSusChem published new progress about Crystallinity. 21876-43-7 belongs to class pyridine-derivatives, and the molecular formula is C9H13NO3S, Application of C9H13NO3S.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Nicholson, William I.; Barreteau, Fabien; Leitch, Jamie A.; Payne, Riley; Priestley, Ian; Godineau, Edouard; Battilocchio, Claudio; Browne, Duncan L. published the artcile< Direct Amidation of Esters by Ball Milling>, Quality Control of 93-60-7, the main research area is amide preparation ball milling; amine ester mechanochem amidation; ester amine hydrochloride mechanochem amidation; amidation; amides; ball milling; esters; sustainable chemistry.

The direct mechanochem. amidation of esters RC(O)OR1 (R = Cy, Ph, pyridin-2-yl, etc.; R1 = Me, Et) by ball milling is described. The operationally simple procedure requires an ester, amines R2NHR3 (R2 = H, Me, Et; R3 = i-Pr, Ph, 2,4,6-trimethylphenyl, etc.; R2R3 = -(CH2)2O(CH2)2-, -(CH2)5-, -(CH2)6-, etc.) and 1,2,3,4-tetrahydroquinoline, and substoichiometric KOtBu, and was used to prepare a large and diverse library of 78 amide structures RC(O)N(R2)R3 and (3,4-dihydroquinolin-1(2H)-yl)(phenyl)methanone with modest to excellent efficiency. Heteroaromatic and heterocyclic components are specifically shown to be amenable to this mechanochem. protocol. This direct synthesis platform has been applied to the synthesis of active pharmaceutical ingredients (APIs) and agrochems. as well as the gram-scale synthesis of an active pharmaceutical, all in the absence of a reaction solvent.

Angewandte Chemie, International Edition published new progress about Amidation. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Quality Control of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Alvarez, Diana M.; Duarte, Luisa F.; Corrales, Nicolas; Smith, Patricio C.; Gonzalez, Pablo A. published the artcile< Cetylpyridinium chloride blocks herpes simplex virus replication in gingival fibroblasts>, Reference of 123-03-5, the main research area is cetylpyridinium chloride antiviral gingival fibroblast herpes simplex virus infection; Antiviral; Cetylpyridinium chloride, CPC; Fibroblasts; Herpes simplex viruses; NF-κB.

Infections with herpes simplex viruses are lifelong and highly prevalent worldwide. Individuals with clin. symptoms elicited by HSVs may suffer from occasional or recurrent herpetic lesions in the orofacial and genital areas. Despite the existence of nucleoside analogs that interfere with HSV replication, such as acyclovir, these drugs are somewhat ineffective in treating skin lesions as topical formulations only reduce in one or few days the duration of the herpetic ulcers. Cetylpyridinium chloride (CPC) is a quaternary ammonium compound present in numerous hygiene products, such as mouthwashes, deodorants, aphtae-treating formulations and oral tablets as an anti-septic to limit bacterial growth. Some reports indicate that CPC can also modulate host signaling pathways, namely NF-κB signaling. Because HSV infection is modulated by NF-κB, we sought to assess whether CPC has antiviral effects against HSVs. Using wild-type HSV-1 and HSV-2, as well as viruses that are acyclovir-resistant or encode GFP reporter genes, we assessed the antiviral capacity of CPC in epithelial cells and human gingival fibroblasts expanded from the oral cavity and its mechanism of action. We found that a short, 10-min exposure to CPC added after HSV entry into the cells, significantly limited viral replication in both cell types by impairing viral gene expression. Interestingly, our results suggest that CPC blocks HSV replication by interfering with the translocation of NF-κB into the nucleus of HSV-infected cells. Taken together, these findings suggest that formulations containing CPC may help limit HSV replication in infected tissues and consequently reduce viral shedding.

Antiviral Research published new progress about Antiviral agents. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Reference of 123-03-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pratap, Ramendra; Yorimitsu, Hideki published the artcile< Palladium-Catalyzed Amination of Aryl Sulfides and Sulfoxides with Azaarylamines of Poor Nucleophilicity>, Recommanded Product: N-Phenylpyridin-4-amine, the main research area is heteroaryl amine preparation; sulfide aryl azaarylamine amination palladium catalyst; sulfoxide aryl azaarylamine amination palladium catalyst.

The amination of aryl sulfides and sulfoxides (Ar)2S and (Ar)2SO2 [Ar = C6H5, 2-naphthyl, biphenyl-4-yl, etc.] with azaarylamines R1NH2 (R1 = pyrimidin-2-yl, pyrazin-2-yl, quinolin-3-yl, etc.) is investigated using a palladium-N-heterocyclic carbene (NHC) complex I. Because azaarylamines are less nucleophilic than anilines, more reactive diaryl sulfides and sulfoxides are found to be suitable coupling partners that liberate better leaving arenethiolate or arenesulfenate anions, instead of aryl Me sulfides RSCH3 [R = 4-FC6H4, 2-naphthyl, 4-(2,5,5-trimethyl-1,3-dioxan-2-yl)phenyl, etc.] as reported previously.

Synthesis published new progress about Amination. 22961-45-1 belongs to class pyridine-derivatives, and the molecular formula is C11H10N2, Recommanded Product: N-Phenylpyridin-4-amine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Mondal, Rakesh; Chakraborty, Gargi; Guin, Amit Kumar; Pal, Subhasree; Paul, Nanda D. published the artcile< Iron catalyzed metal-ligand cooperative approaches towards sustainable synthesis of quinolines and quinazolin-4(3H)-ones>, Quality Control of 350-03-8, the main research area is quinoline quinazolinone preparation; alc ketone aminobenzamide dehydrogenative coupling iron catalyst metal ligand.

Herein authors report simple, efficient, and economically affordable metal-ligand cooperative strategies for synthesizing quinolines and quinazolin-4(3H)-ones via dehydrogenative functionalization of alcs. Various polysubstituted quinolines and quinazolin-4(3H)-ones were prepared in good yields via dehydrogenative coupling of readily available alcs. with ketones and 2-aminobenzamides, resp. under air using a well-defined Fe(II)-catalyst, ([FeL1Cl2]) bearing a redox-active azo-aromatic pincer 2-((4-chlorophenyl), (diazenyl)-1,10-phenanthroline) (L1). Control experiments and mechanistic investigation disclose that the one-electron reduced mono-anionic species [1]- bearing an iron-stabilized azo-anion radical ligand catalyzes these reactions. Both iron and the redox-active arylazo ligand participate synergistically during the different steps of these catalytic reactions.

Tetrahedron published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Quality Control of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Webster, Alyssa A.; Huo, Jianqiang; Milliken, Jenna; Sullivan, Pat; Kubelka, Jan; Hoberg, John O. published the artcile< Hydrogen gas formation from the photolysis of rhenium hydrides - mechanistic and computational studies>, COA of Formula: C10H6Cl2N2, the main research area is dihydrogen elimination kinetics photolysis bipyridine rhenium hydride substituent effect; bipyridine rhenium hydride preparation kinetics photolysis dihydrogen elimination; optimized geometry bipyridine rhenium hydride photolysis dihydrogen elimination DFT.

The photolysis of 4,4′-disubstituted, 2,2′-bipyridine fac-Re(bpy)(CO)3H derivatives produces stoichiometric H2 gas. The rate of production varies greatly depending on the electronic nature of the disubstituted bipyridine (bpy) with halogenated substituents increasing the rate. Isotope labeling studies along with B3LYP geometry optimization DFT modeling studies indicate a mechanism involving a Re-H-Re bridging complex that leads to a dimeric Re-Re(η2-H2) state prior to dissociating H2 gas.

Dalton Transactions published new progress about Hydrides Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation) (bipyridine rhenium hydrides). 1762-41-0 belongs to class pyridine-derivatives, and the molecular formula is C10H6Cl2N2, COA of Formula: C10H6Cl2N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Qingxu; Li, Yan; Zhi, Ying; Liu, Bo; Sun, Jingyong published the artcile< design, synthesis and bioactivity evaluation of novel quinazoline based KRASG12C inhibitors>, SDS of cas: 329214-79-1, the main research area is quinazoline antitumor mol docking sarcoma inhibitor.

KRAS is a member of the RAS gene family, which is involved in the regulation of human life activities. KRASG12C mutation is distributed in many tumors and has been the focus of attention. In our study, we analyzed the binding of BAY-293 to KRAS protein using mol. docking technol. We designed and synthesized 20 compounds and tested their bioactivity. At the same time, we found that compound 8P (IC50 = 2.6 ± 1.2 μM) had good inhibitory activity against the A549 cell line and compound 8e had a good inhibitory effect on the McF-7 cell line with IC50 = 5.5 ± 0.3 μM.

New Journal of Chemistry published new progress about Antitumor agents. 329214-79-1 belongs to class pyridine-derivatives, and the molecular formula is C11H16BNO2, SDS of cas: 329214-79-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Chaubey, Surabhi; Yadav, Rajesh K.; Tripathi, Santosh K.; Yadav, Bal Chandra; Singh, Sudhir N.; Kim, Tae Wu published the artcile< Covalent Triazine Framework as an Efficient Photocatalyst for Regeneration of NAD(P)H and Selective Oxidation of Organic Sulfide>, Product Details of C10H8N2, the main research area is NADPH covalent triazine framework photocatalyst organic sulfide selective oxidation.

Covalent triazine frameworks (CTFs), belonging to the super-family of covalent organic frameworks, have attracted significant attention as a new type of photosensitizer due to the superb light-harvesting ability and efficient charge transfer originating from the large surface area. However, the wide optical band gap in CTFs, which is larger than 3.0 eV, hinders the efficient light harvesting in the visible range. To overcome this limitation, we developed the new type CTFs photocatalyst based on the donor-acceptor conjugation scheme by using melamine (M) and 2,6-diaminoanthraquinone (AQ) as monomeric units. The melamine-2,6-diaminoanthraquinone-based covalent triazine frameworks (M-AQ-CTFs) photocatalyst shows the excellent light-harvesting capacity with high molar extinction coefficient, and the suitable optical band gap involving the internal charge transfer character. Combination of M-AQ-CTFs and artificial photosynthetic system including the organometallic rhodium complex, acting as an electron mediator, exhibited the excellent photocatalytic efficiency for the regeneration of the nicotinamide cofactors such as NAD(P)H. In addition, this photocatalyst showed the high photocatalytic efficiency for the metal-free aerobic oxidation of sulfide. This study demonstrates the high potential of CTFs photocatalyst with the donor-acceptor conjugated scheme can be actively used for artificial photosynthesis.

Photochemistry and Photobiology published new progress about Anaerobic oxidation. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Product Details of C10H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Wendian; Yang, Hailong; Li, Ruihao; Lv, Hui; Zhang, Xumu published the artcile< Kinetic Resolution of Racemic 3,4-Disubstituted 1,4,5,6-Tetrahydropyridine and 3,4-Disubstituted 1,4- Dihydropyridines via Rh-Catalyzed Asymmetric Hydrogenation>, Application In Synthesis of 93-60-7, the main research area is piperidine tetrahydropyridine preparation; tetrahydropyridine dihydropyridine asym hydrogenation rhodium catalyst.

Kinetic resolution of racemic 3,4-disubstituted 1,4,5,6-tetrahydropyridines and 3,4-disubstituted 1,4-dihydropyridines was developed by Rh-catalyzed asym. hydrogenation, affording chiral 3,4-disubstituted piperidines and chiral 3,4-disubstituted 1,4,5,6-tetrahydropyridines with high selectivity factors (s = up to 1057). Remarkably, all four stereoisomers of 3,4-disubstituted piperidine can be easily prepared using this method. Furthermore, the synthetic utility of this methodol. was demonstrated by efficient synthesis of antidepressant drug (-)-paroxetine.

ACS Catalysis published new progress about Diastereoselective synthesis. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Application In Synthesis of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem