Month: October 2022

HPLC of Formula: 103-74-2In 2019 ,《Novel silver(I) complexes bearing mefenamic acid and pyridine derivatives: Synthesis, chemical characterization and in vitro anticancer evaluation》 was published in Inorganica Chimica Acta. The article was written by Altay, Ahmet; Caglar, Sema; Caglar, Bulent; Sahin, Zarife Sibel. The article contains the following contents:

Two Ag(I) complexes [Ag2(μ-mef)2(2-pymet)2] (1), [Ag2(μ-mef)2(2-pyet)2] (2) containing mefenamic acid, 2-pyridinemethanol and 2-pyridineethanol were synthesized and characterized by using SCXRD, FTIR, elemental and thermal anal. techniques. 1 Was synthesized as a single crystal whereas 2 was obtained as a microcrystalline powder. 1 Consists of binuclear structure. The argentophilic interaction occurs among silver(I) ions due to the short Ag···Ag distance (2.8710(10) Å). Two Ag(I) centers are connected by carboxylato oxygen-bridge to form the binuclear metal core. The FTIR spectra and thermal anal. studies confirmed that both complexes exhibited similar structures. In vitro antiproliferative activity of both complexes were evaluated against MCF-7, HT-29 and HepG2 cancer cell lines. The apoptotic effects and intracellular ROS generation from both complexes were investigated in MCF-7 cell line by flow cytometry anal. The XTT and LDH assays revealed that both complexes showed strong antiproliferative activity with higher selectivity towards cancer cells compared to the normal cells. Annexin V/propidium iodide assay exhibited that apoptotic cell number was increased in MCF-7 cells with increasing concentrations of Ag(I) complexes. Also, both complexes induced the ROS generation considerably in MCF-7 cells suggesting the possible pro-oxidant activity of the novel synthesized Ag(I) complexes. Taken together, these findings provide a notable support for potential utility of Ag(I) complexes as novel anticancer agents against numerous kind of carcinogenesis. The experimental part of the paper was very detailed, including the reaction process of 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2HPLC of Formula: 103-74-2)

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. HPLC of Formula: 103-74-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1122-54-9In 2022 ,《Pd(II) Complexes with Pyridine Ligands: Substituent Effects on the NMR Data, Crystal Structures, and Catalytic Activity》 was published in Inorganic Chemistry. The article was written by Kurpik, Gracjan; Walczak, Anna; Goldyn, Mateusz; Harrowfield, Jack; Stefankiewicz, Artur R.. The article contains the following contents:

A wide range of functionalized pyridine ligands were employed to synthesize a variety of Pd(II) complexes [PdL4](NO3)2 and [PdL2Y2], where L = 4-X-py and Y = Cl- or NO3-. Their structures were unambiguously established via anal. and spectroscopic methods in solution (NMR spectroscopy and mass spectrometry) as well as in the solid state (x-ray diffraction). This in-depth characterization showed that the functionalization of ligand mols. with groups of either electron-withdrawing or -donating nature (EWG and EDG) results in significant changes in the physicochem. properties of the desired coordination compounds Downfield shifts of signals in the 1H NMR spectra were observed upon coordination within and across the complex families, clearly indicating the relation between NMR chem. shifts and the ligand basicity as estimated from pKa values. A detailed crystallog. study revealed the operation of a variety of weak interactions, which may be factors explaining aspects of the solution chem. of the complexes. The Pd(II) complexes are efficient and versatile precatalysts in Suzuki-Miyaura and Heck cross-coupling reactions within a scope of structurally distinct substrates, and factors were identified that have contributed to efficiency improvement in both processes. In the experiment, the researchers used many compounds, for example, 4-Acetylpyridine(cas: 1122-54-9Related Products of 1122-54-9)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Related Products of 1122-54-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1539-42-0In 2022 ,《[99mTc-BBPA]: A possible SPECT agent to understand the role of 18-kDa translocator protein (PBR/TSPO) during neuro-glial interaction》 was published in Bioorganic Chemistry. The article was written by Kumari, Neelam; Kaul, Ankur; Deepika; Srivastava, Krishna; Mishra, Gauri; Bhagat, Sunita; Singh, Vinay Kumar; KumarTiwari, Anjani. The article contains the following contents:

The translocator protein (TSPO, 18 kDa) is one of the most promising biomarker to understand the role of neuroinflammation in human as well as in different animal species. Here we report a new TSPO-selective ligand 2-(5-(2-(bis(pyridin-2-yl methyl)amino)acetamido)-2-oxobenzo[d] oxazol-3(2H)-yl)-N-methyl-N-phenylacetamide, BBPA, which is supposed to be a potential probe to understand the role of TSPO in neuro-glial interaction through SPECT modality. The experimental part of the paper was very detailed, including the reaction process of Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Related Products of 1539-42-0)

Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. The compound is a tridentate ligand in coordination chemistry and commonly used to produce Zn-based chemosensors/probes, such as Zinpry.Related Products of 1539-42-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C6H7Br2NIn 2021 ,《Evaluating Metal-Ligand Interactions of Metal-Binding Isosteres Using Model Complexes》 was published in Inorganic Chemistry. The article was written by Seo, Hyeonglim; Prosser, Kathleen E.; Kalaj, Mark; Karges, Johannes; Dick, Benjamin L.; Cohen, Seth M.. The article contains the following contents:

Bioisosteres are a useful approach to address pharmacokinetic liabilities and improve drug-like properties. Specific to developing metalloenzyme inhibitors, metal-binding pharmacophores (MBPs) have been combined with bioisosteres, to produce metal-binding isosteres (MBIs) as alternative scaffolds for use in fragment-based drug discovery (FBDD). Picolinic acid MBIs have been reported and evaluated for their metal-binding ability, pharmacokinetic properties, and enzyme inhibitory activity. However, their structural, electronic, and spectroscopic properties with metal ions other than Zn(II) have not been reported, which might reveal similarities and differences between MBIs and the parent MBPs. To this end, [M(TPA)(MBI)]+ (M = Ni(II) and Co(II), TPA = tris(2-pyridylmethyl)amine) is presented as a bioinorganic model system for investigating picolinic acid, four heterocyclic MBIs, and 2,2′-bipyridine. These complexes were characterized by x-ray crystallog. as well as NMR, IR, and UV-vis spectroscopies, and their magnetic moments were accessed. In addition, [(TpPh,Me)Co(MBI)] (TpPh,Me = hydrotris(3,5-phenylmethylpyrazolyl)borate) was used as a second model compound, and the limitations and attributes of the two model systems are discussed. These results demonstrate that bioinorganic model complexes are versatile tools for metalloenzyme inhibitor design and can provide insights into the broader use of MBIs. After reading the article, we found that the author used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Electric Literature of C6H7Br2N)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Electric Literature of C6H7Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Formula: C5H3Br2NIn 2019 ,《The development of improved syntheses of PPARγ-sparing, insulin sensitizing thiazolidinedione-ketones》 was published in Tetrahedron Letters. The article was written by Tanis, Steven P.; Colca, Jerry R.; Parker, Timothy T.; Artman, Gerald D. III; Larsen, Scott D.; Gadwood, Robert C.; Zeller, James R.. The article contains the following contents:

Ketones I [R = H, OMe; R1 = H, Et; Y = C(O); X = CH, N] were selected for clin. development, however their initial syntheses were considered suboptimal for application deep into clin. trials. Direct ketone introduction/maintenance was desired for maximum efficiency and convergence was found to be critically dependent upon the acidity of the nucleophilic species I [R = OMe; R1 = H; X = CH; Y = CHOH] and 1-(5-Ethyl-2-pyridinyl)-ethanone and the use of pre- or post-alkylative oximino-ether/oxime protection. Improvements in overall yield for the syntheses of compound I [R = H; R1 = Et; Y = C(O); X = N] from 20% to 44% and compound I [R = OMe; R1 = H; Y = C(O); X = CH] from 31% to 59% were realized. The results came from multiple reactions, including the reaction of 2,5-Dibromopyridine(cas: 624-28-2Formula: C5H3Br2N)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Formula: C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Biotin-tagged cis-dichlorido-oxidovanadium(IV) complex for DNA crosslinking and photo-induced apoptotic cytotoxicity》 was written by Kumar, Arun; Sahoo, Somarupa; Dixit, Akanksha; Karande, Anjali A.; Chakravarty, Akhil R.. COA of Formula: C12H13N3This research focused onvanadium oxo chloro biotin appended dipicolylamine complex preparation anticancer; crystal structure vanadium oxo chloro biotin appended dipicolylamine complex. The article conveys some information:

Cis-dichlorido-oxidovanadium(IV) complexes [VO(dpa/L1)Cl2] (1, 2) of dipicolylamine (dpa, 1 as control species) and 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid (biotin)-appended dpa (L1, 2 as active species) were prepared and their anticancer activity studied. Single crystal X-ray diffraction anal. of complex 1 revealed a cis arrangement of two chloride ligands in a distorted octahedral geometry with VIVON3Cl2. The dpa ligand displayed a facial mode of coordination. The complexes were 1:1 electrolytic in an aqueous medium and showed a significant enhancement of conductivity on irradiation with visible light. Complex 2 having the biotin moiety showed cytotoxicity in visible light of 400-700 nm giving IC50 value of 15.0(±0.2) μM in HeLa cells and 5.0(±1.2) μM in HepG2 cells. The complex did not show any apparent generation of reactive oxygen species (ROS) in dichlorofluorescein diacetate (DCFDA) assay. The complex displayed apoptotic photo-induced cytotoxicity following DNA crosslinking pathway as ascertained from the comet assay. In the experiment, the researchers used Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0COA of Formula: C12H13N3)

Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. The compound is a tridentate ligand in coordination chemistry and commonly used to produce Zn-based chemosensors/probes, such as Zinpry.COA of Formula: C12H13N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Chemoselective Synthesis of 1,1-Disubstituted Vinyl Triflates from Terminal Alkynes Using TfOH in the Presence of TMSN3》 was written by Tummatorn, Jumreang; Punjajom, Kunlayanee; Rodphon, Warabhorn; Ruengsangtongkul, Sureeporn; Chaisan, Nattawadee; Lumyong, Kanyapat; Thongsornkleeb, Charnsak; Nimnual, Phongprapan; Ruchirawat, Somsak. Quality Control of 4-EthynylpyridineThis research focused onvinyl triflate regioselective chemoselective preparation; terminal alkyne regioselective chemoselective triflation triflic acid silyl azide; hydrazoic acid generated triflation toxic explosive. The article conveys some information:

1,1-Disubstituted vinyl triflates were prepared chemoselectively and regioselectively by direct hydrotriflation of terminal alkynes with TfOH and TMSN3 in DCM at room temperature; internal alkynes did not react under these conditions. Aryl alkynes with both terminal and internal alkyne moieties reacted only at their terminal alkyne moieties. Hydrazoic acid generated in situ in the triflation reaction is toxic and potentially explosive; the reactions should be performed in a well-ventilated fume hood.4-Ethynylpyridine(cas: 2510-22-7Quality Control of 4-Ethynylpyridine) was used in this study.

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Quality Control of 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Four congenetic zinc(II) MOFs from delicate solvent-regulated strategy: Structural diversities and fluorescent properties》 was written by Wen, Gui-Lin; Liu, Bo; Liu, Dao-Fu; Wang, Feng-Wu; Li, Li; Zhu, Liang; Song, Dong-Mei; Huang, Chao-Xiu; Wang, Yao-Yu. COA of Formula: C5H3Br2NThis research focused onzinc carboxylphenyl pyridine MOF preparation crystal structure thermal stability; fluorescence zinc carboxylphenyl pyridine MOF. The article conveys some information:

Four new congenetic zinc(II) MOFs, namely [Zn5(bdcpp)3(DMF)(H2O)4]n·x(solvent) (1), [Zn2(bdcpp)(Hbdcpp)]n·y(solvent) (2), [Zn2(bdcpp)(DMF)(H2O)2]n (3), and [Zn2(bdcpp)(NMP)(H2O)2]n (4) (H4bdcpp = 2,6-bis(2′,4′-dicarboxylphenyl)pyridine, DMF = N,N’-dimethylformamide, NMP = N-methyl-2-pyrrolidone), were synthesized solvothermally with different solvent systems. Stabilized by Zn2(COO)4 paddle-wheel building blocks, the resulting MOFs 1-4 represent diverse structural features. Structurally, 1 is a rarely 3,4-c binodal 2D bilayered framework, 2 possesses a 4-c 2D (4,4) sql planar network accommodating two kinds of hetero chiral helix chains, 3 and 4 are isostructural 1D loop ladder chains except different solvent mols. occupying the axial terminals of Zn2(COO)4 paddle-wheels. This approach based on solvent-regulated strategy aiming to allow the structural fine-tuning provides a good role model in reticular chem. Complexes 1-3 display excellent solid-state photoluminescence stemming from the metal-to-ligand charge transfer or intraligand charge transmission. The results came from multiple reactions, including the reaction of 2,6-Dibromopyridine(cas: 626-05-1COA of Formula: C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.COA of Formula: C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Heterogeneous palladium-catalysed intramolecular C(sp3)-H α-arylation for the green synthesis of oxindoles》 was written by Salameh, Nihad; Anastasiou, Ioannis; Ferlin, Francesco; Minio, Francesco; Chen, Shaomin; Santoro, Stefano; Liu, Ping; Gu, Yanglong; Vaccaro, Luigi. Formula: C5H5BrN2 And the article was included in Molecular Catalysis on April 30 ,2022. The article conveys some information:

The development of a waste-minimized protocol for the synthesis of oxindoles I [R = H, Me; R1 = Me, Et, Bn; R2 = H, Me, F; R3 = H, F, Me, CF2; R4 = H, Me, Cl, CN, etc.; R5 = CH, N] using cyclopentyl Me ether (CPME) as a safe and green reaction medium and palladium on carbon (Pd/C) as a reusable catalyst was presented. This protocol is efficiently applied to a variety of substrates 2-R2-3-R3-4-R4-5-R5-6-X-C6N(R1)C(O)CH3 [X = Br, Cl] affording products I with excellent yields, minimal metal contamination and min. waste production The catalyst was recovered and reused for four consecutive runs without any apparent loss of efficiency. Moreover, products I were isolated by simple precipitation from heptane with no need for chromatog. separations, and both CPME and heptane were recovered. Waste-minimization is reflected by the low E-factor calculated for the presented protocol. In the experiment, the researchers used many compounds, for example, 2-Bromopyridin-3-amine(cas: 39856-58-1Formula: C5H5BrN2)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Formula: C5H5BrN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Selective approach to N-substituted tertiary 2-pyridones》 was written by Wang, Yu; Xu, Yaoyao; Khan, Shahid; Zhang, Zhunjie; Khan, Ajmal. Product Details of 197958-29-5This research focused onvinyl cyclic carbonate hydroxypyridine palladium catalyst regioselective enantioselective amination; allyl pyridone preparation. The article conveys some information:

The regio- and enantioselective amination of readily available vinyl cyclic carbonates with ambivalent 2-hydroxypyridines was achieved using a Pd(0)/DACH-naphthyl catalyst system. The reaction proceeded under simple conditions, providing access to chiral N-substituted 2-pyridones that bear elusive tertiary carbon centers. A significant drawback previously related to making these products via transition metal-catalyzed allylic substitution procedures was overcome by this catalytic method. In the part of experimental materials, we found many familiar compounds, such as 2-Pyridinylboronic acid(cas: 197958-29-5Product Details of 197958-29-5)

2-Pyridinylboronic acid(cas: 197958-29-5) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Product Details of 197958-29-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem