Tag: 200-300

In 2013,Aik, WeiShen; Demetriades, Marina; Hamdan, Muhammad K. K.; Bagg, Eleanor. A. L.; Yeoh, Kar Kheng; Lejeune, Clarisse; Zhang, Zhihong; McDonough, Michael A.; Schofield, Christopher J. published 《Structural Basis for Inhibition of the Fat Mass and Obesity Associated Protein (FTO)》.Journal of Medicinal Chemistry published the findings.Reference of Methyl 5-bromopicolinate The information in the text is summarized as follows:

The fat mass and obesity associated protein (FTO) is a potential target for anti-obesity medicines. FTO is a 2-oxoglutarate (2OG)-dependent N-Me nucleic acid demethylase that acts on substrates including 3-methylthymidine, 3-methyluracil, and 6-methyladenine. To identify FTO inhibitors, we screened a set of 2OG analogs and related compounds using differential scanning fluorometry- and liquid chromatog.-based assays. The results revealed sets of both cyclic and acyclic 2OG analogs that are FTO inhibitors. Identified inhibitors include small mols. that have been used in clin. studies for the inhibition of other 2OG oxygenases. Crystallog. analyses reveal inhibition by 2OG cosubstrate or primary substrate competitors as well as compounds that bind across both cosubstrate and primary substrate binding sites. The results will aid the development of more potent and selective FTO inhibitors.Methyl 5-bromopicolinate(cas: 29682-15-3Reference of Methyl 5-bromopicolinate) was used in this study.

Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Reference of Methyl 5-bromopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Formula: C6H2Cl3NO2On May 1, 2008 ,《Degradation of picloram by the electro-Fenton process》 appeared in Journal of Hazardous Materials. The author of the article were Oezcan, Ali; Sahin, Yuecel; Koparal, A. Savas; Oturan, Mehmet A.. The article conveys some information:

The degradation of the picloram, a widely used herbicide, was undertaken by the electrochem. advanced oxidation process, namely electro-Fenton in aqueous solution This process generates catalytically OH radicals that are strong oxidizing reagents for the oxidation of organic substances. Degradation kinetics of picloram was investigated. Kinetic results evidence a pseudo first-order degradation, with a rate constant of reaction between picloram and OH radicals of (2.73 ± 0.08) × 109 M-1 s-1. The effect of applied current and catalyst concentration on the degradation and mineralization of picloram was also investigated. The optimum applied current and catalyst concentration values for the degradation of picloram was determined as 300 mA and 0.2 mM Fe3+, resp. Mineralization of picloram was followed by the total organic carbon (TOC) anal. At the end of 8 h of electrolysis, 95% of the initial TOC was removed. Several degradation products were identified by using HPLC, LC-MS, GC-MS, and IC anal. The identified byproducts allowed to propose a mineralization pathway for the picloram degradation In the experiment, the researchers used many compounds, for example, 3,5,6-Trichloropicolinic acid(cas: 40360-44-9Formula: C6H2Cl3NO2)

3,5,6-Trichloropicolinic acid(cas: 40360-44-9) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Formula: C6H2Cl3NO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Rational Design of 2-Chloroadenine Derivatives as Highly Selective Phosphodiesterase 8A Inhibitors》 was published in Journal of Medicinal Chemistry in 2020. These research results belong to Huang, Yadan; Wu, Xu-Nian; Zhou, Qian; Wu, Yinuo; Zheng, Dongxiao; Li, Zhe; Guo, Lei; Luo, Hai-Bin. Formula: C6H7Br2N The article mentions the following:

To validate the hypothesis that Tyr748 is a crucial residue to aid the discovery of highly selective phosphodiesterase 8A (PDE8A) inhibitors, we identified a series of 2-chloroadenine derivatives based on the hit clofarabine. Structure-based design targeting Tyr748 in PDE8 resulted in the lead compound 3a (I) (IC50 = 0.010 μM) with high selectivity with a reasonable druglike profile. In the X-ray crystal structure, I bound to PDE8A with a different mode from 3-isobutyl-1-methylxanthine (a pan-PDE inhibitor) and gave a H-bond of 2.7 Å with Tyr748, which possibly interprets the 220-fold selectivity of 3a against PDE2A. Addnl., oral administration of compound I achieved remarkable therapeutic effects against vascular dementia (VaD), indicating that PDE8 inhibitors could serve as potential anti-VaD agents. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Formula: C6H7Br2N)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Formula: C6H7Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Dynamer and Metallodynamer Interconversion: An Alternative View to Metal Ion Complexation》 was published in Inorganic Chemistry in 2020. These research results belong to Brzechwa-Chodzynska, Anna; Zielinski, Michal; Gilski, Miroslaw; Harrowfield, Jack M.; Stefankiewicz, Artur R.. COA of Formula: C5H3Br2N The article mentions the following:

A bifunctional mol. containing both a bidentate binding site for metal ions and an aminopyrimidine H-bond donor-acceptor site has been synthesized, and its properties, in its free and coordinated forms, have been established in solution and in the solid state by anal. and spectroscopic methods as well as by x-ray structure determinations Structural characterization has shown that it forms a one-dimensional H-bonded polymeric assembly in the solid state, while spectroscopic measurements indicate that it also aggregates in solution The reaction of a simple Fe(II) salt with this assembly results in the emergence of two geometrical isomers of the complex: [FeL3](BF4)2·9H2O-C1 (meridional, mer) and [FeL3]2(SiF6)(BF4)2·12H2O-C2 (facial, fac). While, complex C1 in the solid state generates a one-dimensional H-bonded polymer involving just two ligands on each Fe center, with the chirality of the complex units alternating along the polymer chain, the structure of complex C2 shows NH···N interactions seen in both the ligand and mer complex (C1) structures to be completely absent. Physicochem. properties of the free and complexed ligand differ substantially. Two distinct types of dynamic supramol. polymers (organic/dynamer and metal-organic/metallodynamer) featuring multiple functional groups (both for metal ion coordination and H-bonding interactions) encoded within a single mol. component were synthesized and characterized in the solution and in the solid state. The formation of isomeric Fe(II) complexes shows that drastic modifications of the ligand’s H-bonding interactions result. The experimental part of the paper was very detailed, including the reaction process of 2,5-Dibromopyridine(cas: 624-28-2COA of Formula: C5H3Br2N)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.COA of Formula: C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2018,Sensors and Actuators, B: Chemical included an article by Yao, Shun; Zhang, Gaojian; Wang, Haiyan; Song, Jinjin; Liu, Tianyan; Yang, Mingdi; Yu, Jianhua; Yang, Xingyuan; Tian, Yupeng; Zhang, Xuanjun; Zhou, Hongping. SDS of cas: 31106-82-8. The article was titled 《Exploration the effect of structural adjustment on identifying medium and bio-targeting based on two similar coumarin compounds》. The information in the text is summarized as follows:

Two novel similar structural coumarin-based fluorescent compounds L1 and L2 employing ether oxygen chain and 2 – pyridine unit had been prepared to explore the effect of structural adjustment on property. The prepared L2 through slightly adjusting structure of L1 exhibited the prominent fluorescence responses to Hg2+ and Cu2+ in H2O, which could monitor the corresponding metals ion in mitochondria of Hela cells, but L1 only recognized Hg2+ through turn-on fluorescence response in CH3OH/H2O, fluorescence co-localization studies illustrated that the L1 mainly located at lysosome. The recognition mechanism had been established by 1H NMR titration, Job′s plot, MAlDI-TOF mass spectrometry and single crystal structure. Bio-imaging experiments revealed that L1 and L2 could qual. monitor Hg2+ or Cu2+ in Hela cells and mouse kidney tissues. In the experiment, the researchers used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8SDS of cas: 31106-82-8)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.SDS of cas: 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2001,Song, Jinhua J.; Yee, Nathan K. published 《A Concise Synthesis of Fusaric Acid and (S)-(+)-Fusarinolic Acid》.Journal of Organic Chemistry published the findings.Synthetic Route of C7H6BrNO2 The information in the text is summarized as follows:

The authors have developed the most efficient synthesis of the naturally occurring alkaloid title compounds to date (four steps with overall yield of 55% and 70%, resp.). This synthesis is based on a unified and flexible strategy using 5-bromo-2-iodopyridine as a template and is readily applicable to analog synthesis. The carbonylative ester formation was found to occur exclusively at the C2 position of the pyridine ring under catalysis of Pd(PHh3)2Cl2 to afford the monoester in excellent yield without the complication of diester formation. A greatly improved synthesis of 5-bromo-2-iodopyridine is also reported. In addition to this study using Methyl 5-bromopicolinate, there are many other studies that have used Methyl 5-bromopicolinate(cas: 29682-15-3Synthetic Route of C7H6BrNO2) was used in this study.

Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Synthetic Route of C7H6BrNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Church, Robert; Trust, Ronald; Albright, J. Donald; Powell, Dennis published an article in Journal of Organic Chemistry. The title of the article was 《New Synthetic Routes to 3-, 5-, and 6-Aryl-2-chloropyridines》.Application of 10177-08-9 The author mentioned the following in the article:

The efficient synthesis of 3-, 5-, and 6-aryl-2-chloropyridines, e.g., I (R1 = H, 3-pyridinyl, SO2Ph, etc., R2 = H, 3-F3CC6H4, 2,4-Cl2C6H3, 4-Ph, etc., R3 = H, Ph, 3-pyridinyl, etc.), via the facile preparation of 5-(dimethyamino)aryl-substituted pentadienyl nitriles and cyclization with hydrochloric acid is described. This approach allows for the introduction of other electron-withdrawing substituents on the pyridine ring as well as the preparation of the desired unsubstituted arylpyridines. Some differences in the rates of cyclization of the pentadienyl nitriles as well as the yields of chloropyridines were observed that depended on the position and degree of substitution in the aryl substituent. The arylpentadienyl nitriles Me2NCH:CCHCH:CArCN (Ar = 3-pyridinyl, 3-F3CC6H4, 3-MeOC6H4, Ph) could also be converted directly into the corresponding 2-aminopyridines. In the experiment, the researchers used 2-Oxo-5-phenyl-1,2-dihydropyridine-3-carboxylic acid(cas: 10177-08-9Application of 10177-08-9)

2-Oxo-5-phenyl-1,2-dihydropyridine-3-carboxylic acid(cas: 10177-08-9) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Application of 10177-08-9 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C12H10Cl2N2On October 3, 2011 ,《Synthesis and Characterization of Tris(Heteroleptic) Ru(II) Complexes Bearing Styryl Subunits》 was published in Inorganic Chemistry. The article was written by Myahkostupov, Mykhaylo; Castellano, Felix N.. The article contains the following contents:

The authors have developed and optimized a well-controlled and refined methodol. for the synthesis of substituted π-conjugated 4,4′-distyryl-2,2′-bipyridine ligands and also adapted the tris(heteroleptic) synthetic approach developed by Mann and co-workers to produce two new representative Ru(II)-based complexes bearing the metal oxide surface-anchoring precursor 4,4′-bis[E-(p-methylcarboxy-styryl)]-2,2′-bipyridine. The two targeted Ru(II) complexes, (4,4′-dimethyl-2,2′-bipyridine)(4,4′-di-tert-butyl-2,2′-bipyridine)(4,4′-bis[E-(p-methylcarboxy-styryl)]-2,2′-bipyridine) ruthenium(II) hexafluorophosphate, [Ru(dmbpy)(dtbbpy)(p-COOMe-styryl-bpy)](PF6)2 (1) and (4,4′-dimethyl-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(4,4′-bis[E-(p-methylcarboxy-styryl)]-2,2′-bipyridine) ruthenium(II) hexafluorophosphate, [Ru(dmbpy)(dnbpy)(p-COOMe-styryl-bpy)](PF6)2 (2) were obtained as anal. pure compounds in high overall yields (>50% after 5 steps) and were isolated without significant purification effort. In these tris(heteroleptic) mols., NMR-based structural characterization became nontrivial as the coordinated ligand sets each sense profoundly distinct magnetic environments greatly complicating traditional 1D spectra. However, rational two-dimensional approaches based on both homo- and heteronuclear couplings were readily applied to these structures producing quite definitive anal. characterization and the associated methodol. is described. Preliminary photoluminescence and photochem. characterization of 1 and 2 strongly suggests that both mols. are energetically and kinetically suitable to serve as sensitizers in energy-relevant applications. In the part of experimental materials, we found many familiar compounds, such as 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4COA of Formula: C12H10Cl2N2)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. COA of Formula: C12H10Cl2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 31106-82-8In 2019 ,《Theoretical exploration for recognition mechanism of two similar coumarin-based probes on Hg2+ and Cu2+》 was published in Journal of Molecular Structure. The article was written by Wang, Haiyan; Yao, Shun; Liu, Qian; Wang, Kun; Yu, Haizhu; Zhu, Xiaojiao; Kong, Lin; Zhou, Hongping. The article contains the following contents:

Two coumarin-based fluorescent probes with two or one pyridine groups, denoted as L1 (I) and L2(II), were synthesized, which exhibited quick identification of Hg2+ and/or Cu2+ in water medium, resp. In order to explore the difference in recognition performance caused by structure and to guide the structural tuning in the experiments, optimized structures, Natural Bond Orbital (NBO) at. charges, Wiberg bond index (WBI), HOMO-LUMO gaps and complexation energies between probes and center cation were calculated by d. functional theory (DFT) methods using BP86 with 6-31(d-p) and lanL2DZ basis sets. Combining the calculated parameters of different coordination positions and coordination numbers of Hg2+ and Cu2+ complexes with the exptl. results, the most likely coordination modes are inferred, which provides the beneficial guidance for designing probes rationally. In the experiment, the researchers used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Recommanded Product: 31106-82-8)

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. Recommanded Product: 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2,5-DibromopyridineIn 2021 ,《Embedding red emitters in the NbO-type metal-organic frameworks for highly sensitive luminescence thermometry over tunable temperature range》 appeared in ACS Applied Materials & Interfaces. The author of the article were Wang, Shuo; Gong, Mengyao; Han, Xue; Zhao, Dian; Liu, Jingwen; Lu, Yantong; Li, Chunxia; Chen, Banglin. The article conveys some information:

The intrinsic advantages of metal-organic frameworks (MOFs), including extraordinarily high porosities, tailorable architectures, and diverse functional sites, make the MOFs platforms for multifunctional materials. In this study, we synthesized two kinds of isostructural NbO-type Zn2+-based MOFs, where two structurally similar tetracarboxylate ligands, 5,5′-(pyrazine-2,5-diyl)diisophthalic acid (H4PZDDI) and 5,5′-(pyridine-2,5-diyl)diisophthalic acid (H4PDDI), with pyridine or pyrazine moieties, were employed as the organic linkers. By embedding the red-emitting cationic units of pyridinium hemicyanine dye 4-[p-(dimethylamino)styryl]-1-methylpyridinium (DSM) and trivalent europium ion (Eu3+), two types of composites, DSM@ZnPZDDI and DSM@ZJU-56 and Eu3+@ZnPZDDI and Eu3+@ZJU-56, were harvested and evaluated for use as potential ratiometric temperature probes. The temperature-responsive luminescence of these dual-emitting composites was investigated, and their representative features of relative sensitivity, temperature resolution, spectral repeatability, and luminescence color change were discussed. Importantly, compared with the DSM-incorporated composites, Eu3+@ZnPZDDI and Eu3+@ZJU-56 show a much wider sensing temperature range and higher relative sensitivities, suggesting the performance of the composites can be engineered by elaborately combining the host and guest units. Given the rich choices of porous MOFs and emitting units, such a strategy can be useful in the design and preparation of multifunctional dual-emitting sensory materials. In the experimental materials used by the author, we found 2,5-Dibromopyridine(cas: 624-28-2Application In Synthesis of 2,5-Dibromopyridine)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Application In Synthesis of 2,5-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem