Category: pyridine-derivatives

Koay, Natalie; Tonelli, Devin L.; Truong, Vouy Linh published an article on January 5 ,2011. The article was titled 《Practical and efficient synthesis of N-fused tricyclic indoles》, and you may find the article in Tetrahedron Letters.Formula: C8H9NO3 The information in the text is summarized as follows:

A practical and efficient synthesis of Me 6,7,8,9-tetrahydropyrido[1,2-a]indol-10-ylacetate derivatives is reported. This synthetic approach featured the nucleophilic aromatic substitution of 2-piperidinemethanol derivatives with haloaryl fluorides, and the intramol. Heck coupling as key steps to afford the desired N-fused tricyclic indoles. After reading the article, we found that the author used Methyl 5-methoxypicolinate(cas: 29681-39-8Formula: C8H9NO3)

Methyl 5-methoxypicolinate(cas: 29681-39-8) 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: C8H9NO3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2016,ChemMedChem included an article by Doebelin, Christelle; Patouret, Remi; Garcia-Ordonez, Ruben D.; Chang, Mi Ra; Dharmarajan, Venkatasubramanian; Kuruvilla, Dana S.; Novick, Scott J.; Lin, Li; Cameron, Michael D.; Griffin, Patrick R.; Kamenecka, Theodore M.. Formula: C7H8BrNO. The article was titled 《N-Arylsulfonyl Indolines as Retinoic Acid Receptor-Related Orphan Receptor γ (RORγ) Agonists》. The information in the text is summarized as follows:

The nuclear retinoic acid receptor-related orphan receptor γ (RORγ; NR1F3) is a key regulator of inflammatory gene programs involved in T helper 17 (TH17) cell proliferation. As such, synthetic small-mol. repressors (inverse agonists) targeting RORγ have been extensively studied for their potential as therapeutic agents for various autoimmune diseases. Alternatively, enhancing TH17 cell proliferation through activation (agonism) of RORγ may boost an immune response, thereby offering a potentially new approach in cancer immunotherapy. Herein the authors describe the development of N-arylsulfonyl indolines as RORγ agonists. Structure-activity studies reveal a critical linker region in these mols. as the major determinant for agonism. Hydrogen/deuterium exchange coupled to mass spectrometry (HDX-MS) anal. of RORγ-ligand complexes help rationalize the observed results. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)-3-methoxypyridine(cas: 889360-84-3Formula: C7H8BrNO)

2-(Bromomethyl)-3-methoxypyridine(cas: 889360-84-3) 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: C7H8BrNO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2002,Organic Syntheses included an article by Smith, Adam P.; Lamba, Jaydeep J. S.; Fraser, Cassandra L.. Application of 138219-98-4. The article was titled 《Efficient synthesis of halomethyl-2,2′-bipyridines: 4,4′-bis(chloromethyl)-2,2′-bipyridine》. The information in the text is summarized as follows:

Silylation of 4,4′-dimethyl-2,2′-bipyridine with LDA followed by chlorotrimethylsilane gave 97% 4,4′-bis(trimethylsilylmethyl)-2,2′-bipyridine, treatment of which with Cl3CCCl3 and CsF in MeCN, gave 91% 4,4′-bis(chloromethyl)-2,2′-bipyridine. Among the 7 other halobipyridines similarly prepared were 98% 5-(chloromethyl)-2,2′-bipyridine 99% 4,4′-bis(bromomethyl)-2,2′-bipyridine. In the experiment, the researchers used 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Application of 138219-98-4)

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. Application of 138219-98-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ghiazza, Clement; Faber, Teresa; Gomez-Palomino, Alejandro; Cornella, Josep published an article on January 31 ,2022. The article was titled 《Deaminative chlorination of aminoheterocycles》, and you may find the article in Nature Chemistry.Application In Synthesis of 4-Amino-2-picoline The information in the text is summarized as follows:

Herein we present a simple methodol. that enabled the NH2 groups in aminoheterocycles to be conceived as masked modification handles. With the aid of a simple pyrylium reagent and a cheap chloride source, C(sp2)-NH2 could be converted into C(sp2)-Cl bonds. The method was characterized by its wide functional group tolerance and substrate scope, allowing the modification of different classes of heteroaromatic motifs (five- and six-membered heterocycles), bearing numerous sensitive motifs. The facile conversion of NH2 into Cl in a late-stage fashion enabled practitioners to apply Sandmeyer- and Vilsmeier-type transforms without the burden of explosive and unsafe diazonium salts, stoichiometric transition metals or highly oxidizing and unselective chlorinating agents. After reading the article, we found that the author used 4-Amino-2-picoline(cas: 18437-58-6Application In Synthesis of 4-Amino-2-picoline)

4-Amino-2-picoline(cas: 18437-58-6) 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).Application In Synthesis of 4-Amino-2-picoline

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Product Details of 626-05-1In 2021 ,《Rare Fluorescence Red-Shifted Metal-Organic Framework Sensor for Methylamine Derived from an N-Donor Ligand》 was published in Crystal Growth & Design. The article was written by Yao, Shu-Li; Xu, Hui; Zheng, Teng-Fei; Liu, Sui-Jun; Chen, Jing-Lin; Wen, He-Rui. The article contains the following contents:

A three-dimensional (3D) metal-organic framework (MOF) [Cd(bbip)(NDC)]n(JXUST-8, bbip = 2,6-bis(benzimidazol-1-yl)pyridine, and H2NDC = 2,6-naphthalenedicarboxylic acid) with 8-connected bcg topol. was solvothermally synthesized and fully characterized. The fluorescence experiments demonstrate that JXUST-8 could selectively distinguish methylamine (MA) by fluorescence red shift, and the detection limit is 0.341 ppm. It is noteworthy that red shift emission could enlarge the fluorescence signal, which is beneficial to realize sensing. In addition, JXUST-8 performs relatively good thermal stability, chem. stability, and reusability. Importantly, JXUST-8 could be considered as the first example of a bbip-based MOF as well as the second case of a fluorescence red shifted MOF sensor toward MA. In the experiment, the researchers used many compounds, for example, 2,6-Dibromopyridine(cas: 626-05-1Product Details of 626-05-1)

2,6-Dibromopyridine(cas: 626-05-1) 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. Product Details of 626-05-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C5H3Br2NIn 2020 ,《Controlling Singlet Fission with Coordination Chemistry-Induced Assembly of Dipyridyl Pyrrole Bipentacenes》 was published in ACS Central Science. The article was written by Ribson, Ryan D.; Choi, Gyeongshin; Hadt, Ryan G.; Agapie, Theodor. The article contains the following contents:

Singlet fission has the potential to surpass current efficiency limits in next-generation photovoltaics and to find use in quantum information science. Despite the demonstration of singlet fission in various materials, there is still a great need for fundamental design principles that allow for tuning of photophys. parameters, including the rate of fission and triplet lifetimes. Here, we describe the synthesis and photophys. characterization of a novel bipentacene dipyridyl pyrrole (HDPP-Pent) and its Li- and K-coordinated derivatives HDPP-Pent undergoes singlet fission at roughly 50% efficiency (τSF = 730 ps), whereas coordination in the Li complex induces significant structural changes to generate a dimer, resulting in a 7-fold rate increase (τSF = 100 ps) and more efficient singlet fission with virtually no sacrifice in triplet lifetime. We thus illustrate novel design principles to produce favorable singlet fission properties, wherein through-space control can be achieved via coordination chem.-induced multipentacene assembly. Series of ligand-bridged bipentacenes display differential rates/yields of singlet fission as a result of distinct solution-state structures arising from the identity of the coordinated alkali metal. In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Electric Literature of C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) 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 C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Formula: C6H5NO2In 2021 ,《Mechanistic investigation of the aerobic oxidation of 2-pyridylacetate coordinated to a Ru(II) polypyridyl complex》 was published in Dalton Transactions. The article was written by Sousa, Sinval F.; Ertem, Mehmed Z.; Faustino, Leandro A.; Machado, Antonio Eduardo. H.; Concepcion, Javier J.; Maia, Pedro I. S.; Patrocinio, Antonio Otavio T.. The article contains the following contents:

A new ruthenium polypyridyl complex, [Ru(bpy)2(acpy)]+ (acpy = 2-pyridylacetate, bpy = 2,2′-bipyridine), was synthesized and fully characterized. Distinct from the previously reported analog, [Ru(bpy)2(pic)]+ (pic = 2-pyridylcarboxylate), the new complex is unstable under aerobic conditions and undergoes oxidation to yield the corresponding α-keto-2-pyridyl-acetate (acpyoxi) coordinated to the RuII center. The reaction is one of the few examples of C-H activation at mild conditions using O2 as the primary oxidant and can provide mechanistic insights with important implications for catalysis. Theor. and exptl. investigations of this aerobic oxidative transformation indicate that it takes place in two steps, first producing the α-hydroxo-2-pyridyl-acetate analog and then the final product. The observed rate constant for the first oxidation was in the order of 10-2 h-1. The reaction is hindered in the presence of coordinating solvents indicating the role of the metal center in the process. Theor. calculations at the M06-L level of theory were performed for multiple reaction pathways in order to gain insights into the most probable mechanism. Authors results indicate that O2 binding to [Ru(bpy)2(acpy)]+ is favored by the relative instability of the six-ring chelate formed by the acpy ligand and the resulting RuIII-OO ̇- superoxo is stabilized by the carboxylate group in the coordination sphere. C-H activation by this species involves high activation free energies (ΔG‡ = 41.1 kcal mol-1), thus the formation of a diruthenium μ-peroxo intermediate, [(RuIII(bpy)2(O-acpy))2O2]2+ via interaction of a second [Ru(bpy)2(acpy)]+ was examined as an alternative pathway. The dimer yields two RuIV:O centers with a low ΔG‡ of 2.3 kcal mol-1. The resulting RuIV:O species can activate C-H bonds in acpy (ΔG‡ = 23.1 kcal mol-1) to produce the coordinated α-hydroxo-2-pyridylacetate. Further oxidation of this intermediate leads to the α-keto-2-pyridyl-acetate product. The findings provide new insights into the mechanism of C-H activation catalyzed by transition-metal complexes using O2 as the sole oxygen source. In the experimental materials used by the author, we found Picolinic acid(cas: 98-98-6Formula: C6H5NO2)

Picolinic acid(cas: 98-98-6) is used as a chelate for alkaline earth metals. Used to prepare picolinato ligated transition metal complexes. In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.Formula: C6H5NO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1122-54-9In 2022 ,《Preparation of chiral aryl alcohols: a controllable enzymatic strategy via light-driven NAD(P)H regeneration》 appeared in New Journal of Chemistry. The author of the article were Xing, Xiu; Liu, Yan; Shi, Ming-Liang; Li, Kun; Fan, Xin-Yue; Wu, Zhong-Liu; Wang, Na; Yu, Xiao-Qi. The article conveys some information:

Controllable and mild photoenzymic production of chiral alcs. RCH(OH)R1 [R = Ph, 4-pyridyl, 2-naphthyl, etc.; R1 = H, Me, CH2CO2Me, etc.] was realized by coupling a versatile photochem. NAD(P)H regeneration system with (R)- or (S)-selective ketoreductases. The efficiency of NAD(P)H regeneration was improved using a rhodium functionalized metal organic framework, namely Rh-UiO-67, to adjust and control electron transport and electron utilization. Furthermore, six different ketoreductases could be successfully immobilized on Rh-UiO-67 and combined with the light-driven NAD(P)H regeneration system to produce chiral aryl alcs. Various chiral alcs. with complementary (R)- and (S)-conformations could be constructed by this method with high yields (97%) and excellent stereoselectivity (>99% ee). The results came from multiple reactions, including the reaction of 4-Acetylpyridine(cas: 1122-54-9Related Products of 1122-54-9)

4-Acetylpyridine(cas: 1122-54-9) 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. Related Products of 1122-54-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Safety of 2-BromonicotinaldehydeIn 2019 ,《Ligand Structure Effects on Molecular Assembly and Magnetic Properties of Copper(II) Complexes with 3-Pyridyl-Substituted Nitronyl Nitroxide Derivatives》 appeared in ACS Omega. The author of the article were Sherstobitova, Tatiana; Maryunina, Kseniya; Tolstikov, Svyatoslav; Letyagin, Gleb; Romanenko, Galina; Nishihara, Sadafumi; Inoue, Katsuya. The article conveys some information:

Reaction of Cu(hfac)2 with methyl- and bromo-3-pyridyl-substituted nitronyl nitroxides (LR) leads to assemble a diverse set of coordination complexes: mononuclear [Cu(hfac)2L2-Me], binuclear [{Cu(hfac)2}2(H2O)L2-Me], trinuclear [{Cu(hfac)2}3(L6-Br)2], pentanuclear [{Cu(hfac)2}5(L2-Me)2], and [{Cu(hfac)2}5(L2-Me)4], cocrystals [Cu(hfac)2(L2-Br)2]·[Cu(hfac)2(H2O)2] and [Cu(hfac)2(L2-Br)2]·2[Cu(hfac)2H2O], one-dimensional polymers [Cu(hfac)2L2-Br]n and [Cu(hfac)2L6-Br]n, and cyclic dimers [Cu(hfac)2L5-Me]2, [Cu(hfac)2L5-Br]2, and [Cu(hfac)2L6-Me]2. The mol. structures of the obtained complexes are strongly affected by the substituent type and its location in the pyridine heterocycle. Occupation of the second position of the pyridine ring increases the steric hindrance of both imine and nitroxide coordination sites of L2-R, which is favorable for the formation of various conformers and precipitation of complexes with different mol. structures. The pentanuclear [{Cu(hfac)2}5(L2-Me)2] and [{Cu(hfac)2}5(L2-Me)4] complexes do not have prior analogs and are valuable model objects for investigation of the mechanism of formation of various coordination polymers. The arrangement of long Cu-ONO bonds in {CuO6} square bipyramids due to the weakening nitroxide donor site in complexes, based on L2-Me, L2-Br, and L6-Br ligands, results in ferromagnetic exchange interactions between spins of Cu2+ ions and nitroxides. Complexes with substituents that do not considerably affect the coordination ability of ligands (L5-Me, L5-Br, and L6-Me) exhibit strong antiferromagnetic exchange interactions between spins of Cu2+ ions and nitroxides. The experimental part of the paper was very detailed, including the reaction process of 2-Bromonicotinaldehyde(cas: 128071-75-0Safety of 2-Bromonicotinaldehyde)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Name: 4-CyanopyridineIn 2019 ,《The reductive C3 functionalization of pyridinium and quinolinium salts through iridium-catalysed interrupted transfer hydrogenation》 appeared in Nature Chemistry. The author of the article were Grozavu, Alexandru; Hepburn, Hamish B.; Smith, Philip J.; Potukuchi, Harish K.; Lindsay-Scott, Peter J.; Donohoe, Timothy J.. The article conveys some information:

Aromatic rings are ubiquitous in organic chem. and form the basis of many com. products. Despite the numerous routes available for the preparation of aromatic compounds, there remain few methods that allow their conversion into synthetically useful partially saturated derivatives and even fewer that allow new C-C bonds to be formed at the same time. Here we set out to address this problem and uncover a unique catalytic partial reduction reaction that forms partially saturated azaheterocycles from aromatic precursors. In this reaction, methanol and formaldehyde are used for the reductive functionalization of pyridines and quinolines using catalytic iridium; thus, inexpensive and renewable feedstocks are utilized in the formation of complex N-heterocycles. By harnessing the formation of a nucleophilic enamine intermediate, the C-C bond-forming process reverses the normal pattern of reactivity and allows access to the C3 position of the arene. Mechanistic investigations using D-labeling experiments reveal the source of hydride added to the ring and show the reversible nature of the iridium-hydride addition4-Cyanopyridine(cas: 100-48-1Name: 4-Cyanopyridine) was used in this study.

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Name: 4-Cyanopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem