Category: pyridine-derivatives

In 2017,Nicolaou, K. C.; Rhoades, Derek; Wang, Yanping; Bai, Ruoli; Hamel, Ernest; Aujay, Monette; Sandoval, Joseph; Gavrilyuk, Julia published 《12,13-Aziridinyl Epothilones. Stereoselective Synthesis of Trisubstituted Olefinic Bonds from Methyl Ketones and Heteroaromatic Phosphonates and Design, Synthesis, and Biological Evaluation of Potent Antitumor Agents》.Journal of the American Chemical Society published the findings.Product Details of 31106-82-8 The information in the text is summarized as follows:

The synthesis and biol. evaluation of a series of 12,13-aziridinyl epothilone B analogs is described. These compounds were accessed by a practical, general process that involved a 12,13-olefinic Me ketone as a starting material obtained by ozonolytic cleavage of epothilone B followed by tungsten-induced deoxygenation of the epoxide moiety. The attachment of the aziridine structural motif was achieved by application of the Ess-Kurti-Falck aziridination, while the heterocyclic side chains were introduced via stereoselective phosphonate-based olefinations. In order to ensure high (E) selectivities for the latter reaction for electron-rich heterocycles, it became necessary to develop and apply an unprecedented modification of the venerable Horner-Wadsworth-Emmons reaction, employing 2-fluoroethoxyphosphonates that may prove to be of general value in organic synthesis. These studies resulted in the discovery of some of the most potent epothilones reported to date. Equipped with functional groups to accommodate modern drug delivery technologies, some of these compounds exhibited picomolar potencies that qualify them as payloads for antibody drug conjugates (ADCs), while a number of them revealed impressive activities against drug resistant human cancer cells, making them desirable for potential medical applications. In the experiment, the researchers used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Product Details of 31106-82-8)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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. Product Details of 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2013,Guan, Ai-Ying; Liu, Chang-Ling; Huang, Guang; Li, Hui-Chao; Hao, Shu-Lin; Xu, Ying; Li, Zhi-Nian published 《Design, Synthesis, and Structure-Activity Relationship of Novel Aniline Derivatives of Chlorothalonil》.Journal of Agricultural and Food Chemistry published the findings.Computed Properties of C5H5BrN2 The information in the text is summarized as follows:

Chlorothalonil with both low cost and low toxicity is a popularly used fungicide in the agrochem. field. The presence of nucleophilic groups on this compound allows further chem. modifications to obtain novel chlorothalonil derivatives Fluazinam, another com. available agent with a broad fungicidal spectrum, has a scaffold of diaryl amine structure. To mimic this backbone structure, a variety of (un)-substituted Ph amines was used as nucleophilic agents to react with chlorothalonil to obtain compounds with a di-Ph amine structure. Via an elegant design, two leads, 2,4,5-trichloro-6-(2,4-dichlorophenylamino)-isophthalonitrile and 2,4,5-trichloro-6-(2,4,6-trichlorophenylamino)-isophthalonitrile, with potential fungicidal activity were discovered after a preliminary bioassay screen. These two leads were further modified to obtain final products by replacing the chlorine groups in the Ph ring in Ph amine with other functional groups. These functional groups with various electronic properties and spatial characteristics were considered to explore the relationship between structure and fungicidal activity. The results indicate that the electron-withdrawing group NO2 on the 4 position on the right Ph ring plays a unique role on enhancing the fungicidal activity. The compounds were identified by proton NMR and elemental anal. Bioassays demonstrated that some of the title compounds exhibited excellent fungicidal activities against cucumber downy mildew at 25 mg/L. 2,4,5-Trichloro-6-(2-chloro-4-nitrophenylamino)isophthalonitrile has been shown as the optimal structure with 85% control against cucumber downy mildew at 6.25 mg/L concentration The relationship between structure and fungicidal activity is reported. The present work demonstrates that chlorothalonil derivatives can be used as possible lead compounds for developing novel fungicides. In the experiment, the researchers used 6-Bromopyridin-3-amine(cas: 13534-97-9Computed Properties of C5H5BrN2)

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Computed Properties of C5H5BrN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Towards Property Profiling: SYNTHESIS and SAR Probing of New Tetracyclic Diazaphenothiazine Analogues》 were Empel, Anna; Bak, Andrzej; Kozik, Violetta; Latocha, Malgorzata; Cizek, Alois; Jampilek, Josef; Suwinska, Kinga; Sochanik, Aleksander; Zieba, Andrzej. And the article was published in International Journal of Molecular Sciences in 2021. Category: pyridine-derivatives The author mentioned the following in the article:

A series of new tertiary phenothiazine derivatives containing a quinoline and a pyridine fragment was synthesized by the reaction of 1-methyl-3-benzoylthio-4-butylthioquinolinium chloride with 3-aminopyridine derivatives bearing various substituents on the pyridine ring. The direction and mechanism of the cyclization reaction of intermediates with the structure of 1-methyl-4-(3-pyridyl)aminoquinolinium-3-thiolate was related to the substituents in the 2- and 4-pyridine position. The structures of the compounds were analyzed using 1H, 13C NMR (COSY, HSQC, HMBC) and X-ray anal., resp. Moreover, the antiproliferative activity against tumor cells (A549, T47D, SNB-19) and a normal cell line (NHDF) was tested. The antibacterial screening of all the compounds was conducted against the reference and quality control strain Staphylococcus aureus ATCC 29213, three clin. isolates of methicillin-resistant S. aureus (MRSA). In silico computation of the intermol. similarity was performed using principal component anal. (PCA) and hierarchical clustering anal. (HCA) on the pool of structure/property-related descriptors calculated for the novel tetracyclic diazaphenothiazine derivatives The distance-oriented property evaluation was correlated with the exptl. anticancer activities and empirical lipophilicity as well. The quant. shape-based comparison was conducted using the CoMSA method in order to indicate the potentially valid steric, electronic and lipophilic properties. Finally, the numerical sampling of similarity-related activity landscape (SALI) provided a subtle picture of the SAR trends. In addition to this study using 2-Bromopyridin-3-amine, there are many other studies that have used 2-Bromopyridin-3-amine(cas: 39856-58-1Category: pyridine-derivatives) was used in this study.

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

SDS of cas: 39856-58-1On March 4, 2020, Deng, Tianning; Mazumdar, Wrickban; Ford, Russell L.; Jana, Navendu; Izar, Ragda; Wink, Donald J.; Driver, Tom G. published an article in Journal of the American Chemical Society. The article was 《Oxidation of Non-Activated Anilines to Generate N-Aryl Nitrenoids》. The article mentions the following:

A low temperature, protecting group-free oxidation of 2-substituted anilines was developed to generate an electrophilic N-aryl nitrenoid intermediate that can engage in C-NAr bond formation to constructed functionalized N-heterocycles. Exposure of 2-substituted anilines to PIFA and trifluoroacetic acid or 10 mol % of Sc(OTf)3 triggers nitrenoid formation, followed by productive and selective C-NAr and C-C bond formation to yield spirocyclic- or bicyclic 3H-indoles or benzazepinones. Our experiments demonstrated the breadth of these oxidative processes, uncover underlying fundamental elements that control selectivity and demonstrate how the distinct reactivity patterns embedded in N-aryl nitrenoid reactive intermediates can enable access to functionalized 3H-indoles or benzazepinones. The experimental part of the paper was very detailed, including the reaction process of 2-Bromopyridin-3-amine(cas: 39856-58-1SDS of cas: 39856-58-1)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Aniline, ethanolamines, and several other amines are major industrial commodities used in making rubber, dyes, pharmaceuticals, and synthetic resins and fibres and for a host of other applications. Most of the numerous methods for the preparation of amines may be broadly divided into two groups: (1) chemical reduction (replacement of oxygen with hydrogen atoms in the molecule) of members of several other classes of organic nitrogen compounds and (2) reactions of ammonia or amines with organic compounds.SDS of cas: 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2-Bromopyridin-3-amineOn March 9, 2022, Maust, Mark C.; Hendy, Cecilia M.; Jui, Nathan T.; Blakey, Simon B. published an article in Journal of the American Chemical Society. The article was 《Switchable Regioselective 6-endo or 5-exo Radical Cyclization via Photoredox Catalysis》. The article mentions the following:

Here a simple method for reagent controlled regioselective radical cyclization of halogenated N-heterocycles onto pendant olefins was developed. Radical generation occurs under mild photoredox conditions with control of the regioselectivity governed by the rate of hydrogen atom transfer (HAT). Utilizing a polarity-matched thiol-based HAT agent promoted the highly selective formation of the 5-exo cyclization product. Conversely, limiting the solubility of the HAT reagent Hantzsch ester (HEH) leads to selective formation of the thermodynamically favored 6-endo product. This occurs through an initial 5-exo cyclization, with the resulting alkyl radical intermediate undergoing neophyl rearrangement to form the 6-endo product. Development of this switchable catalysis strategy allows for two modes of divergent reactivity to form either the 6-endo or 5-exo product, generating fused N-heteroaromatic/saturated ring systems. In the experimental materials used by the author, we found 2-Bromopyridin-3-amine(cas: 39856-58-1Application In Synthesis of 2-Bromopyridin-3-amine)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Application In Synthesis of 2-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 18437-58-6On March 1, 2020, Morimoto, Nobuyuki; Oishi, Yoshifumi; Yamamoto, Masaya published an article in Macromolecular Chemistry and Physics. The article was 《The Design of Sulfobetaine Polymers with Thermoresponsiveness under Physiological Salt Conditions》. The article mentions the following:

Thermoresponsive polymers are attractive in terms of basics and applications because of the phase separation in aqueous solution Some sulfobetaine polymers are known for their antifouling biocompatibility and upper critical solution temperature (UCST) type thermoresponsiveness; however, thermoresponsiveness disappears in aliphatic sulfobetaine polymers in physiol. salt conditions. Aromatic cation-containing sulfobetaine polymers are not responded because of the strong intermol. interactions. In this study, new sulfobetaine methacrylamides with a pyridinium cation, 3-(4-(2-methacrylamido)alkyl pyridinio-1-yl)propane-1-sulfonates, (PySMAAm)s, are designed and then prepared the homopolymers using aqueous reversible addition-fragmentation chain transfer polymerization The P(PySMAAm)s exhibited UCST-type thermoresponsiveness that is induced by substitution of the dipole-dipole interaction between the interpolymer side chain to an ion-dipole interaction in physiol. salt conditions. The thermoresponsiveness is affected by the mol. weight and structure of the side chains. Such sulfobetaine polymers can be promising tools as biomaterials especially for drug delivery and regenerative medicine. In the part of experimental materials, we found many familiar compounds, such as 4-Amino-2-picoline(cas: 18437-58-6Related Products of 18437-58-6)

4-Amino-2-picoline(cas: 18437-58-6) belongs to anime. Examples of direct uses of amines and their salts are as corrosion inhibitors in boilers and in lubricating oils (morpholine), as antioxidants for rubber and roofing asphalt (diarylamines), as stabilizers for cellulose nitrate explosives (diphenylamine), as protectants against damage from gamma radiation (diarylamines), as developers in photography (aromatic diamines), as flotation agents in mining, as anticling and waterproofing agents for textiles, as fabric softeners, in paper coating, and for solubilizing herbicides.Related Products of 18437-58-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 4-Amino-2-picolineOn March 28, 2019, Rombouts, Frederik J. R.; Declercq, Lieven; Andres, Jose-Ignacio; Bottelbergs, Astrid; Chen, Lu; Iturrino, Laura; Leenaerts, Joseph E.; Marien, Jonas; Song, Fengbin; Wintmolders, Cindy; Wuyts, Stijn; Xia, Chunfang A.; te Riele, Paula; Bormans, Guy; Vandenberghe, Rik; Kolb, Hartmuth; Moechars, Diederik published an article in Journal of Medicinal Chemistry. The article was 《Discovery of N-(4-[18F]Fluoro-5-methylpyridin-2-yl)isoquinolin-6-amine (JNJ-64326067), a New Promising Tau Positron Emission Tomography Imaging Tracer》. The article mentions the following:

In Alzheimer’s disease, the d. and spread of aggregated tau protein track well with neurodegeneration and cognitive decline, making the imaging of aggregated tau a compelling biomarker. A structure-activity relationship exploration around an isoquinoline hit, followed by an exploration of tolerated fluorination positions, allowed us to identify 9 (JNJ-64326067), a potent and selective binder to aggregated tau with a favorable pharmacokinetic profile and no apparent off-target binding. This was confirmed in rat and monkey positron emission tomog. studies using [18F]9. In the part of experimental materials, we found many familiar compounds, such as 4-Amino-2-picoline(cas: 18437-58-6Recommanded Product: 4-Amino-2-picoline)

4-Amino-2-picoline(cas: 18437-58-6) belongs to anime. Amine, any member of a family of nitrogen-containing organic compounds that is derived, either in principle or in practice, from ammonia (NH3). Naturally occurring amines include the alkaloids, which are present in certain plants; the catecholamine neurotransmitters (i.e., dopamine, epinephrine, and norepinephrine); and a local chemical mediator, histamine, that occurs in most animal tissues.Recommanded Product: 4-Amino-2-picoline

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Dual inhibition of Kif15 by oxindole and quinazolinedione chemical probes》 were Dumas, Megan E.; Chen, Geng-Yuan; Kendrick, Nicole D.; Xu, George; Larsen, Scott A.; Jana, Somnath; Waterson, Alex G.; Bauer, Joshua A.; Hancock, William; Sulikowski, Gary A.; Ohi, Ryoma. And the article was published in Bioorganic & Medicinal Chemistry Letters in 2019. COA of Formula: C5H6BNO2 The author mentioned the following in the article:

The mitotic spindle is a microtubule-based machine that segregates a replicated set of chromosomes during cell division. Many cancer drugs alter or disrupt the microtubules that form the mitotic spindle. Microtubule-dependent mol. motors that function during mitosis are logical alternative mitotic targets for drug development. Eg5 (Kinesin-5) and Kif15 (Kinesin-12), in particular, are an attractive pair of motor proteins, as they work in concert to drive centrosome separation and promote spindle bipolarity. Furthermore, we hypothesize that the clin. failure of Eg5 inhibitors may be (in part) due to compensation by Kif15. In order to test this idea, we screened a small library of kinase inhibitors and identified GW108X, an oxindole that inhibits Kif15 in vitro. We show that GW108X has a distinct mechanism of action compared with a com. available Kif15 inhibitor, Kif15-IN-1 and may serve as a lead with which to further develop Kif15 inhibitors as clin. relevant agents. In addition to this study using 2-Pyridinylboronic acid, there are many other studies that have used 2-Pyridinylboronic acid(cas: 197958-29-5COA of Formula: C5H6BNO2) was used in this study.

2-Pyridinylboronic acid(cas: 197958-29-5) 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.COA of Formula: C5H6BNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2018,Puttreddy, Rakesh; von Essen, Carolina; Rissanen, Kari published 《Halogen Bonds in Square Planar 2,5-Dihalopyridine-Copper(II) Bromide Complexes》.European Journal of Inorganic Chemistry published the findings.Recommanded Product: 53939-30-3 The information in the text is summarized as follows:

Halogen bonding in self-complementary 1:2 metal-ligand complexes obtained from copper(II) bromide (CuBr2) and seven 2,5-dihalopyridines were analyzed using single-crystal x-ray diffraction. All presented discrete complexes form 1D polymeric chains connected with C-X···Br-Cu halogen bonds (XB). In (2-chloro-5-X-pyridine)2·CuBr2 (X = Cl, Br, and I) only the C5-halogen and in (2-bromo-5-X-pyridine)2·CuBr2 (X = Cl, Br, and I) both C2- and C5-halogens form C-X···Br-Cu halogen bonds with the X acting as the XB donor and copper-coordinated bromide as the XB acceptor. The electron-withdrawing C2-chloride in (2-chloro-5-X-pyridine)2·CuBr2 complexes has only a minor effect on the C5-X5···Br-Cu XBs, and the X5···Br distances follow the expected order I5 < Br5 < Cl5 with RXB values of 0.91, 0.94, and 0.99, resp. In (2-bromo-5-X-pyridine)2·CuBr2 complexes, due to the polarization of both halogens, the C2-X2···Br-Cu and C5-X5···Br-Cu RXB values are very similar [0.92-0.99] as a result of the competition between C2- and C5-halogens for XB formation. In addition to the classical halogen bonds, the square-planar CuII complexes exhibit C2-X2···Cu(X = Cl and Br) contacts perpendicular to the Br-Cu-Br plane with shorter C2-Br2···Cu than C2-Cl2···Cu contacts. These interactions induce a pseudo-octahedral geometry for CuII ions. Notably, C2-X2···Br-Cu halogen bonds and the addnl. C2-X2···Cu contacts are slightly enhanced by the C5-halogen electronegativity. In the experiment, the researchers used many compounds, for example, 5-Bromo-2-chloropyridine(cas: 53939-30-3Recommanded Product: 53939-30-3)

5-Bromo-2-chloropyridine(cas: 53939-30-3) 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. Recommanded Product: 53939-30-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Pollice, Robert; Bot, Marek; Kobylianskii, Ilia J.; Shenderovich, Ilya; Chen, Peter published 《Attenuation of London Dispersion in Dichloromethane Solutions》.Journal of the American Chemical Society published the findings.Safety of 2-Bromonicotinaldehyde The information in the text is summarized as follows:

London dispersion constitutes one of the fundamental interaction forces between atoms and between mols. While modern computational methods have been developed to describe the strength of dispersive interactions in the gas phase properly, the importance of inter- and intramol. dispersion in solution remains yet to be fully understood because exptl. data are still sparse in that regard. We herein report a detailed exptl. and computational study of the contribution of London dispersion to the bond dissociation of proton-bound dimers, both in the gas phase and in dichloromethane solution, showing that attenuation of inter- and intramol. dispersive interaction by solvent is large (about 70% in dichloromethane), but not complete, and that current state-of-the-art implicit solvent models employed in quantum-mech. computational studies treat London dispersion poorly, at least for this model system. The results came from multiple reactions, including the reaction of 2-Bromonicotinaldehyde(cas: 128071-75-0Safety of 2-Bromonicotinaldehyde)

2-Bromonicotinaldehyde(cas: 128071-75-0) 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.Safety of 2-Bromonicotinaldehyde

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem