Tag: 100-200

Formula: C7H5NIn 2020 ,《Preparation, Photophysical and Electrochemical Evaluation of an Azaborondipyrromethene/Zinc Porphyrin/Graphene Supramolecular Nanoensemble》 was published in Chemistry – A European Journal. The article was written by Rotas, Georgios; Thomas, Michael B.; Canton-Vitoria, Ruben; D’Souza, Francis; Tagmatarchis, Nikos. The article contains the following contents:

The preparation of an entirely supramol., multichromophoric azaborondipyrromethene (ABDP)/zinc tetraphenylporphyrin (ZnTPP)/exfoliated graphene (GR) nanoensemble was accomplished. The ABDP derivative bears glycol chains for enhancing solubility and a pyridine functionality for allowing coordination with ZnTPP. The ABDP/ZnTPP/GR nanoensemble was characterized in terms of morphol. and composition by using complementary microscopy imaging, thermogravimetric anal., Raman as well as steady-state and time-resolved absorption and emission spectroscopy. The photophys. and electrochem. assessment of ABDP/ZnTPP/GR as well as the binding properties of the ABDP/ZnTPP complex, employed as a reference, are presented. Energy and electron transfer events were observed in ABDP/ZnTPP upon photoexcitation. However, in the case of ABDP/ZnTPP/GR, the graphene-induced aggregation of the chromophores alters their electronic interactions, enhancing the energy/electron transfer process between them. In the experimental materials used by the author, we found 4-Ethynylpyridine(cas: 2510-22-7Formula: C7H5N)

4-Ethynylpyridine(cas: 2510-22-7) 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: C7H5N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Formula: C6H6BrNIn 2021 ,《Palladium-catalyzed dearomative cyclocarbonylation of allyl alcohol for the synthesis of quinolizinones》 appeared in Organic & Biomolecular Chemistry. The author of the article were Xu, Pengcheng; Qian, Bo; Qi, Zaojuan; Gao, Bao; Hu, Bin; Huang, Hanmin. The article conveys some information:

An approach for the synthesis of quinolizinone I (R = H, 6-Me, 7-F, etc.; R1 = H, Me, Ph; R2 = H, Me, pentyl; R3 = H, Me; X = N, CH) with potential bioactivity has been developed via palladium-catalytic dearomative cyclocarbonylation of allyl alc. R4C(R1)=C(R2)CH(R3)OH (R4 = pyridin-2-yl, 5-fluoropyridin-2-yl, pyrazin-2-yl, etc.). Diverse quinolizinone compounds I could be attained with good efficiencies. A feasible reaction pathway could be a successive procedure of allylation, dearomatization, CO insertion and the Heck reaction. In the experiment, the researchers used many compounds, for example, 2-Bromo-5-methylpyridine(cas: 3510-66-5Formula: C6H6BrN)

2-Bromo-5-methylpyridine(cas: 3510-66-5) 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. Formula: C6H6BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2019 ,《Dehydrogenative Synthesis of Quinolines, 2-Aminoquinolines, and Quinazolines Using Singlet Diradical Ni(II)-Catalysts》 appeared in Journal of Organic Chemistry. The author of the article were Chakraborty, Gargi; Sikari, Rina; Das, Siuli; Mondal, Rakesh; Sinha, Suman; Banerjee, Seemika; Paul, Nanda D.. The article conveys some information:

Simple, straightforward, and atom economic methods for the synthesis of quinolines, 2-aminoquinolines, and quinazolines via biomimetic dehydrogenative condensation/coupling reactions, catalyzed by well-defined inexpensive and easy to prepare singlet diradical Ni(II)-catalysts featuring two antiferromagnetically coupled singlet diradical diamine type ligands are described. Various polysubstituted quinolines, 2-aminoquinolines, and quinazolines were synthesized in moderate to good yields from different low-cost and readily accessible starting materials. Several control experiments were carried out to get insight into the reaction mechanism which shows that the nickel and the coordinated diamine ligands participate in a synergistic way during the dehydrogenation of alcs. In the experiment, the researchers used many compounds, for example, 4-Cyanopyridine(cas: 100-48-1Category: pyridine-derivatives)

4-Cyanopyridine(cas: 100-48-1) 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. Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Computed Properties of C6H6BrNIn 2021 ,《Copper-catalyzed, N-auxiliary group-controlled switchable transannulation/nitration initiated by nitro radicals: selective synthesis of pyridoquinazolones and 3-nitroindoles》 appeared in Organic Chemistry Frontiers. The author of the article were Shoberu, Adedamola; Li, Cheng-Kun; Qian, Hai-Feng; Zou, Jian-Ping. The article conveys some information:

Herein, a strategy based on the judicious choice of N-auxiliaries, which stabilize the substrates as well as allow precise and predictable control over their reactivity with tert-Bu nitrite was described. Thus, the stage was set for the copper-assisted, controllable synthesis of pyridoquinazolones or 3-nitroindoles. Mechanistic studies implicate a switch in the mechanism, in which N-2-pyridylindoles reacted via a nitrosation/transannulation process and N-2-pyridoylindoles underwent an amide bond dissociation/nitration sequence. Notably, the subsequent removal of the auxiliary groups was not required in these reactions. In the experimental materials used by the author, we found 2-Bromo-5-methylpyridine(cas: 3510-66-5Computed Properties of C6H6BrN)

2-Bromo-5-methylpyridine(cas: 3510-66-5) 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. Computed Properties of C6H6BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of Bis(pyridin-2-ylmethyl)amineIn 2022 ,《Synthesis, characterization, structural, redox and electrocatalytic proton reduction properties of cobalt polypyridyl complexes》 appeared in Inorganica Chimica Acta. The author of the article were Karumban, Kalai Selvan; Muley, Arabinda; Giri, Bishnubasu; Kumbhakar, Sadananda; Kella, Tatinaidu; Shee, Debaprasad; Maji, Somnath. The article conveys some information:

A monoanionic amido pentadentate ligand bpaqH (2-(bis(pyridin-2-ylmethyl)amino)-N-(quinolin-8-yl)acetamide) and its corresponding cobalt(III) chloro complex [Co(bpaq)Cl]Cl: 1 and aqua derivative [Co(bpaq)(OH2)](ClO4)2: 2 were successfully synthesized and fully characterized by different anal. and spectroscopic techniques such as FT-IR, 1H NMR, UV-vis spectroscopy, ESI mass spectra. The structures of 1 and 2 have been determined by the single-crystal x-ray diffraction. Spectral and redox properties were investigated along with free ligand under electrochem. conditions. Both complexes performed proton reduction activity under soluble, diffusion-limited conditions in acetonitrile with acetic acid as an external proton source with overpotentials of 0.412 V for 1 and 0.394 V for 2. The stability of the catalysts was inspected by the time-dependent UV-vis spectroscopy; 1 and 2 were highly stable in the absence and presence of acetic acid. There was no significant spectral change before and after the controlled potential electrolysis suggesting no change in mol. integrity during electrocatalysis. In the experimental materials used by the author, we found Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Application In Synthesis of Bis(pyridin-2-ylmethyl)amine)

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.Application In Synthesis of Bis(pyridin-2-ylmethyl)amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C7H9NOIn 2022 ,《Synthesis of Substituted Pyrano[3,4-b]Quinolines by Silver-Catalyzed Regioselective Intramolecular Cyclization of 3-Alkynylquinoline Aldehydes》 appeared in Asian Journal of Organic Chemistry. The author of the article were Vani, Damera; Chahal, Kapil; Preethi, Pagilla; Balasubramanian, Sridhar; Rajender Reddy, Kallu. The article conveys some information:

A novel approach for the synthesis of regioselective pyrano[3,4-b]quinolines from 3-alkynylquinoline aldehydes with alcs. as nucleophiles were elucidated. This protocol showed high generality of functional group and provided the pyrano-annulated products good to excellent yields. This methodol. was adopted a new synthetic strategy to develop the 3-alkynylquinolinealdehydes by using methanol as a C1 source. The results came from multiple reactions, including the reaction of 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2COA of Formula: C7H9NO)

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) 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.COA of Formula: C7H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 141-86-6In 2019 ,《Spectroscopic, textural, electrical and magnetic properties of antimicrobial nano Fe(III) Schiff base complex》 appeared in Applied Organometallic Chemistry. The author of the article were Mousa, Emad S.; Mahmoud, Walaa H.. The article conveys some information:

A novel Schiff base ligand (L) was prepared through condensation of 2,6-diaminopyridine and dibenzoyl methane in a 1:1 ratio. This Schiff base ligand was used for complex formation reaction with Fe(III) chloride. The structures of the ligand and its complex were deduced from elemental analyses, mass spectroscopy, 1H NMR, IR, UV-visible, electronic spectra, magnetic moment, molar conductivity measurements, thermogravimetric analyses and x-ray diffraction. The mol. and electronic structures of both ligand and complex were optimized theor. using d. function theory (DFT) method. Moreover, the antimicrobial activities of the prepared compounds were studied and proven against some pathogenic bacteria. The Fe(III) complex had higher biol. activity than that of the free ligand. Proceeding from the collected information, the properties of the complex were further studied. The particle size was determined by dynamic light scattering technique to be 92.59 nm. Textural properties of the nano complex were studied by N2 adsorption to estimate the sp. surface area, pore volume and pore size distribution. The pores in the complex were found in the micropore-mesopore range. Differential scanning calorimetric measurements reveal the existence of four endothermic peaks at 243.8, 308, 339.8 and 380.5 K. Dielec. properties and conductivity were scanned at different frequencies and temperatures The dielec. constant reaches a peak value of 600 at ∼390 K, 30 Hz. A cross-over from the universal dielec. response to the super linear power law of conductivity is reported for this complex at T ≤ 345 K. Finally, the AC-magnetic susceptibility measurements were carried out in the low-temperature region. The complex showed paramagnetic behavior with a slight change in the magnitude of its magnetic moment at T = 244 K. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Recommanded Product: 141-86-6)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Recommanded Product: 141-86-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Khokhar, Deepali; Jadoun, Sapana; Arif, Rizwan; Jabin, Shagufta; Rathore, Dhirendra Singh published an article in Journal of Molecular Structure. The title of the article was 《Facile synthesis of the chemically oxidative grafted copolymer of 2,6-diaminopyridine (DAP) and thiophene (Th) for optoelectronic and antioxidant studies》.Electric Literature of C5H7N3 The author mentioned the following in the article:

The current preliminary investigation presents for the first time the synthesis of grafted copolymer Poly (DAP-g-Th) from 2,6-diaminopyridine (DAP) and thiophene (Th) via chem. oxidative copolymerization using ferric chloride as an oxidizing agent for enhancing its photoluminescence properties. Modifications via copolymerization were confirmed by optical, morphol., and spectral anal. through FT-IR, UV-Visible, XRD, fluorescence studies. Increased value of oscillator strength, molar extinction coefficient, and lowered bandgap were observed in the case of poly(DAP-g-Th). FT-IR results showing alteration in the properties of polymer lying intermediate between individual monomers confirming copolymerization Intermediate quantum yield value disclosing transformations in the electronic structure of the poly(DAP-g-Th). Morphol. studies also suggested the intermediate property of copolymer. Poly(DAP-g-Th) showed the best antioxidant activity against DPPH free radical assay and its IC50 value was reported 0.024 ± 0.001 mg/mL. The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6Electric Literature of C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Electric Literature of C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bozejewicz, Daria; Osmialowski, Borys; Kaczorowska, Malgorzata Anna; Witt, Katarzyna published their research in Membranes (Basel, Switzerland) in 2021. The article was titled 《2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe2) derivatives for the removal of Cu(II), Ni(II), Co(II), and Zn(II) ions from aqueous solutions in classic solvent extraction and a membrane extraction》.Reference of 2,6-Diaminopyridine The article contains the following contents:

In this paper, the application of new substituted 2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe2) derivatives for the recovery of copper(II), nickel(II), cobalt(II), and zinc(II) ions from aqueous solutions was described. The structures of the synthesized compounds were confirmed by NMR spectroscopy (NMR), electrospray ionization high-resolution mass spectrometry (ESI HRMS), and tandem mass spectrometry methods (HCD MS/MS). Three different derivatives of 2,6-bis((benzoyl-R)amino)pyridine were used as carriers in membrane processes and as extractants in classic solvent extraction In each case, the single derivative recovery was carried out on a model solution that contained only one type of metal ions. Spectrophotometry studies were performed to determine the stability constants of the complexes formed by the synthesized species with analyzed metals ions. The results obtained indicate that the synthesized compounds form stable complexes with Cu(II), Ni(II), Co(II), and Zn(II) ions and can be used in both types of studied recovery processes. However, the effectiveness of the synthesized compounds in the recovery of metal ions depends both on the structure of compounds and properties of metals as well as on their concentration The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6Reference of 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Reference of 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Photochemically Mediated Nickel-Catalyzed Synthesis of N-(Hetero)aryl Sulfamides》 was written by Simons, R. Thomas; Scott, Georgia E.; Kanegusuku, Anastasia Gant; Roizen, Jennifer L.. Application In Synthesis of 5-Bromo-2-chloropyridine And the article was included in Journal of Organic Chemistry in 2020. The article conveys some information:

A general method for the N-arylation of sulfamides with aryl bromides is described. The protocol leverages a dual-catalytic system, with [Ir(ppy)2(dtbbpy)]PF6 as a photosensitizer, NiBr2•glyme as a precatalyst, and DBU as a base, and proceeds at room temperature under visible light irradiation Using these tactics, aryl boronic esters and aryl chlorides can be carried through the reaction untouched. The developed reactions efficiently engage simple bromoarenes and primary sulfamides in between 66% and quant. yields. For more challenging substrates, such as secondary sulfamides, reaction efficiency is documented. Thereby, these methods complement known Buchwald-Hartwig coupling methods for N-arylation of sulfamides. A general method for the N-arylation of sulfamides with aryl bromides is described. The protocol leverages a dual-catalytic system of Ni and a photoexcitable Ir complex and proceeds at room temperature under visible light irradiation Using these tactics, aryl boronic esters and aryl chlorides can be carried through the reaction untouched. Thereby, this method complements known Buchwald-Hartwig coupling methods for N-arylation of sulfamides. The experimental part of the paper was very detailed, including the reaction process of 5-Bromo-2-chloropyridine(cas: 53939-30-3Application In Synthesis of 5-Bromo-2-chloropyridine)

5-Bromo-2-chloropyridine(cas: 53939-30-3) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Application In Synthesis of 5-Bromo-2-chloropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem