Month: October 2022

Lin, Na; Huang, Lei; Ding, Huan-huan; Zhang, Yue; Dong, Wen-jing; Xia, Bin-yuan; Ren, Wen-sheng; Zhao, Dong published their research in Organic Chemistry Frontiers in 2021. The article was titled 《Synthesis of para-linked azacalix[n]pyridine[n]pyrazines and their uranyl ion binding properties》.Application of 626-05-1 The article contains the following contents:

Based on the fragment coupling strategy, the novel macrocycles, para-linked azacalix[n]pyridine[n]pyrazines (n = 2 and 4) with coexisting different heteroaromatics, were synthesized readily starting from 2,5-dibromopyrazine and 2,6-dibromopyridine. According to the X-ray diffraction anal., the macrocycle azacalix[4]pyridine[4]pyrazine adopted a unique boat-type conformation with a large rectangular cavity in the solid state. The complexation between the azacalix[n]pyridine[n]pyrazines and uranyl ions was investigated by DFT calculations and 1H NMR and UV-vis titration experiments It was found that they were strong host mols. to form 1 : 1 complexes with uranyl ions with an association constant of up to (1.38 +/= 0.04) x 105 M-1. After reading the article, we found that the author used 2,6-Dibromopyridine(cas: 626-05-1Application of 626-05-1)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gao, Xiang-Jing; Zheng, He-Gen published their research in Dalton Transactions in 2021. The article was titled 《The difference in the CO2 adsorption capacities of different functionalized pillar-layered metal-organic frameworks (MOFs)》.Computed Properties of C5H3Br2N The article contains the following contents:

The excessive use of fossil energy has caused the CO2 concentration in the atm. to increase year by year. MOFs are ideal CO2 adsorbents that can be used in CO2 capture due to their excellent characteristics. Studies of the structure-activity relation between the small structural differences in MOFs and the CO2 adsorption capacities are helpful for the development of efficient MOF-based CO2 adsorbents. Therefore, a series of pillar-layered MOFs with similar structural and different functional groups were designed and synthesized. The CO2 adsorption tests were carried out at 273 K to explore the relation between the small structural differences in MOFs caused by different functional groups and the CO2 adsorption capacities. Significantly, compound 6 which contains a pyridazinyl group has a 30.9% increase in CO2 adsorption capacity compared to compound 1 with no functionalized group. The experimental process involved the reaction of 2,5-Dibromopyridine(cas: 624-28-2Computed Properties of C5H3Br2N)

2,5-Dibromopyridine(cas: 624-28-2) 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. Computed Properties of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wei, Yuan-Ping; Yang, Sizhuo; Wang, Peng; Guo, Jin-Han; Huang, Jier; Sun, Wei-Yin published their research in Dalton Transactions in 2021. The article was titled 《Iron(III)-bipyridine incorporated metal-organic frameworks for photocatalytic reduction of CO2 with improved performance》.Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine The article contains the following contents:

Metal-organic frameworks (MOFs) represent an emerging class of platforms to assemble single site photocatalysts for artificial photosynthesis. In this work, we report a new CO2 reduction photocatalyst (UiO-68-Fe-bpy) based on a robust Zr(IV)-MOF platform with incorporated Fe(bpy)Cl3 (bpy refers to the 4′-methyl-[2,2′-bipyridine] moiety) via amine-aldehyde condensation. We show that this hybrid catalyst can reduce CO2 to form CO under visible light illumination with excellent selectivity and enhanced activity with respect to its parent MOF and corresponding homogeneous counterpart. Using steady state and transient absorption (TA) spectroscopy, we show that the enhanced photocatalytic activity of UiO-68-Fe-bpy is attributed to the elongated excited state lifetime of Fe(bpy)Cl3 after being incorporated to the UiO-68-NH2 platform. This work demonstrates the great potential of MOFs as a next generation platform for solar fuel conversion. After reading the article, we found that the author used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lin, Shengjie; Zhou, Ping; Xu, Tingting; Fan, Lihui; Wang, Xinxin; Yue, Lianglan; Jiang, Zhenzhen; Zhang, Yuanbin; Zhang, Zhengyi; He, Yabing published their research in Inorganic Chemistry in 2021. The article was titled 《Modulation of Topological Structures and Adsorption Properties of Copper-Tricarboxylate Frameworks Enabled by the Effect of the Functional Group and Its Position》.Safety of Methyl 5-bromopicolinate The article contains the following contents:

To push forward the structural development and fully explore the potential utility, it is highly desired but challenging to regulate in a controllable manner the structures and properties of MOFs. The authors reported the structural and functional modulation of Cu(II)-tricarboxylate frameworks by employing a strategy of engineering the functionalities and their positions. Two pairs of unsym. biaryl tricarboxylate ligands modified with a Me group and a pyridinic-N atom at distinct positions were logically designed and synthesized, and their corresponding Cu(II)-based MOFs were solvothermally constructed. Diffraction analyses revealed that the variation of functionalities and their positions furnished three different types of topol. structures, which the authors ascribed to the steric effect exerted by the Me group and the chelating effect involving the pyridinic-N atom. Also, gas adsorption studies showed that three of them are potential candidates as solid separation media for acetylene (C2H2) purification, with the separation potential tailorable by altering functionalities and their locations. At 106.7 kPa and 298 K, the C2H2 uptake capacity varies from 64.1 to 132.4 cm3 (STP) g-1, while the adsorption selectivities of C2H2 over its coexisting components of CO2 and CH4 fall at 3.28-4.60 and 14.1-21.9, resp. In the experiment, the researchers used Methyl 5-bromopicolinate(cas: 29682-15-3Safety of Methyl 5-bromopicolinate)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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. Safety of Methyl 5-bromopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Roy, Sebastien A.; Zgheib, Jose; Zhou, Cuihan; Arndtsen, Bruce A. published an article in 2021. The article was titled 《Palladium catalyzed synthesis of indolizines via the carbonylative coupling of bromopyridines, imines and alkynes》, and you may find the article in Chemical Science.Formula: C6H6BrN The information in the text is summarized as follows:

Authors report herein the development of a palladium-catalyzed, multicomponent synthesis of indolizines. The reaction proceeds via the carbonylative formation of a high energy, mesoionic pyridine-based 1,3-dipole, which can underwent spontaneous cycloaddition with alkynes. Overall, this provides a route to prepare indolizines in a modular fashion from combinations of com. available or easily generated reagents: 2-bromopyridines, imines and alkynes. After reading the article, we found that the author used 2-Bromo-5-methylpyridine(cas: 3510-66-5Formula: C6H6BrN)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Formula: C6H6BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kazancioglu, Mustafa Z.; Quirion, Kevin; Wipf, Peter; Skoda, Erin M. published an article in 2022. The article was titled 《Enantioselective synthesis and selective functionalization of 4-aminotetrahydroquinolines as novel GLP-1 secretagogues》, and you may find the article in Chirality.Quality Control of 2-(Bromomethyl)pyridine hydrobromide The information in the text is summarized as follows:

Polysubstituted tetrahydroquinolines were obtained in moderate to high yields (28% to 92%) and enantiomeric ratios (er 89:11 to 99:1) by a three-component Povarov reaction using a chiral phosphoric acid catalyst. Significantly, post-Povarov functional group interconversions allowed a rapid access to a library of 36 enantioenriched 4-aminotetrahydroquinoline derivatives featuring five points of diversity. Selected analogs were assayed for their ability to function as glucagon-like peptide-1 (GLP-1) secretagogues. After reading the article, we found that the author used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Quality Control of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine is widely used in the precursor to agrochemicals and pharmaceuticals. Also, it is used as an important reagent and organic solvent.Quality Control of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Cauley, Anthony N.; Ramirez, Antonio; Barhate, Chandan L.; Donnell, Andrew F.; Khandelwal, Purnima; Sezen-Edmonds, Melda; Sherwood, Trevor C.; Sloane, Jack L.; Cavallaro, Cullen L.; Simmons, Eric M. published an article in Organic Letters. The title of the article was 《Ni/Photoredox-Catalyzed C(sp2)-C(sp3) Cross-Coupling of Alkyl Pinacolboronates and (Hetero)Aryl Bromides》.HPLC of Formula: 3510-66-5 The author mentioned the following in the article:

Utilizing quinoline as a mild, catalytic additive, broadly applicable conditions for the Ni/photoredox-catalyzed C(sp2)-C(sp3) cross-coupling of (hetero)aryl bromides RBr (R = N-bocpiperidin-4-yl, N-bocindol-5-yl) and alkyl pinacolboronate esters R1R2CH(Bpin) [R1 = H, Me; R2 = Me, Ph, 2-methylphenyl, pyridin-3-yl, pyrimidin-5-yl, etc.; R1R2 = -(CH2)3-, -(CH2)5-, -(CH2)3O(CH2)2-, etc.] were developed, which can be applied to both batch and flow reactions. In addition to primary benzylic nucleophiles, both stabilized and non-stabilized secondary alkyl boronic esters are effective coupling partners. D. functional theory calculations suggest that alkyl radical generation occurs from an alkyl-B(pin)-quinoline complex, which may proceed via an energy transfer process. In the part of experimental materials, we found many familiar compounds, such as 2-Bromo-5-methylpyridine(cas: 3510-66-5HPLC of Formula: 3510-66-5)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Gallant, Sarah K.; Tipker, Ryan M.; Glueck, David S. published an article in Organometallics. The title of the article was 《Copper-Catalyzed Asymmetric Alkylation of Secondary Phosphines via Rapid Pyramidal Inversion in P-Stereogenic Cu-Phosphido Intermediates》.Quality Control of 2-(Bromomethyl)pyridine hydrobromide The author mentioned the following in the article:

Development of metal-catalyzed asym. synthesis of P-stereogenic phosphines was guided by the hypothesis that pyramidal inversion occurs rapidly in metal-phosphido intermediates, but this process was not observed directly for all metals of interest. The authors report an enantioselective Cu(Josiphos)-catalyzed alkylation of secondary phosphines and observation of the reaction intermediates, including variable temperature NMR studies of low-barrier pyramidal inversion at P in the key P-stereogenic terminal phosphido complexes Cu(diphos*)(PRR’), and a study of their reversible formation from secondary phosphine-silanolate complexes Cu(diphos*)[PHR(R’)](OSiMe3). The experimental process involved the reaction of 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Quality Control of 2-(Bromomethyl)pyridine hydrobromide)

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. Quality Control of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Chen, Feng-Gui; Xu, Wei; Chen, Jing; Xiao, Hong-Ping; Wang, Hai-Ying; Chen, Zhongyan; Ge, Jing-Yuan published an article in Inorganic Chemistry. The title of the article was 《Dysprosium(III) Metal-Organic Framework Demonstrating Ratiometric Luminescent Detection of pH, Magnetism, and Proton Conduction》.SDS of cas: 1134-35-6 The author mentioned the following in the article:

A multifunctional metal-organic framework, (Hdmbpy)[Dy(H2dobdc)2(H2O)]·3H2O (Dy-MOF, H4dobdc = 2,5-dihydroxyterephthalic acid, dmbpy = 4,4′-dimethyl-2,2′-bipyridine), was synthesized and structurally characterized. The metal center DyIII is connected by four carboxyl groups to form the [Dy2(CO2)4] binuclear nodes, which are further interconnected by eight sep. H2dobdc2- ligands to form a three-dimensional (3D) framework including hydrophilic triangular channels and abundant hydrogen-bonding networks. Dy-MOF has good stability in aqueous solution as well as in harsh acidic or alk. solutions (pH range: 2.0-12.0). Furthermore, the luminescence signal of Dy-MOF undergoes a visualized color change as the acidity of the solution alters, which is the typical behavior of pH ratiometric probe. At a 100% relative humidity, Dy-MOF exhibits a high proton conductivity σ (1.70 x 10-4 S cm-1 at 303 K; 1.20 x 10-3 S cm-1 at 343 K) based on the proton hopping mechanism, which can be classified as a superionic conductor with σ exceeding 10-4 S cm-1. Addnl., the ferromagnetic interaction and magnetic relaxation behavior are simultaneously achieved in Dy-MOF. Herein, the combination of luminescence sensing, magnetism, and proton conduction in a single-phase 3D MOF may offer great potential applications in smart multitasking devices. The experimental process involved the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6SDS of cas: 1134-35-6)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.SDS of cas: 1134-35-6 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C12H12N2In 2019 ,《Syntheses, X-Ray Crystal Structures, Emission Properties and DFT Calculations of Monoprotonated Polypyridines》 appeared in ChemistrySelect. The author of the article were Yoshikawa, Naokazu; Yamazaki, Shoko; Kato, Natsumi; Kubota, Akari; Sawai, Mika; Noda, Kaoru; Kanehisa, Nobuko; Inoue, Tsuyoshi; Nakata, Eiji; Takashima, Hiroshi. The article conveys some information:

Monoprotonated compounds [(L)HPF6] were prepared by the reaction of (L=bpy, phen, dpphen, bqn and ppy) with concentrated HCl in water. Monoprotonated pyridine rings are hydrogen bonded intramolecularly to the adjacent pyridine ring and intermolecularly to the adjacent PF6- in compounds These hydrogen bonds restrain the nonradiative decay to produce intense emission. D. functional theory was applied to interpret the planarity in compounds The attachment of one proton to the nitrogen in [(dpphen)HPF6] and [(bqn)HPF6] leads to the strong emission in acetonitrile (Φ = 0.046 and 0.097, resp.). In particular, the attachment of one proton to the ppy nitrogen results in exhibiting a strong emission with a large quantum yield (Φ = 0.264). The experimental part of the paper was very detailed, including the reaction process of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Electric Literature of C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Electric Literature of C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem