Tag: 100-200

In 2022,Sayin, Koray; Rezaeivala, Majid; Erkan, Sultan; Guney, Elif published an article in Journal of Molecular Structure. The title of the article was 《Determination of structural, spectral, computational and OLED properties of Ex2.2Box2+ Cyclophane and its derivatives: Experimental and computational study》.Formula: C7H5N The author mentioned the following in the article:

Ex2.2Box2+ Cyclophane was synthesized and spectral characterization of this compound was completed by using 1H, 13CNMR, and ESI-MS spectroscopy. Furthermore, this compound and its seven derivatives were investigated by computational analyses. Initially, they were optimized at B3LYP/6-31G(d) level in the gas phase and water; then, IR and NMR spectra were analyzed. Especially, exptl. and computational results were compared with each other in Ex2.2Box2+ Cyclophane. Computational spectral results were presented due to the good harmony between exptl. and computational results. These compounds chem. reactivity and electron mobility were investigated using a contour plot of frontier MO and mol. electrostatic potential map. Finally, the OLED properties were examined, and it was found that three of the compounds were suitable candidates for OLED applications. In the part of experimental materials, we found many familiar compounds, such as 4-Ethynylpyridine(cas: 2510-22-7Formula: C7H5N)

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Formula: C7H5N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Shi, Zhaojiang; Lu, Hao-Kuan; Li, Nan; Yuan, Yaofeng; Li, Zhen; Ye, Ke-Yin published an article in Organic Chemistry Frontiers. The title of the article was 《Electrochemical oxidative dearomatization of 2-arylthiophenes》.SDS of cas: 197958-29-5 The author mentioned the following in the article:

A green and sustainable electrochem. oxidative dearomatization of 2-arylthiophenes was reported. The variation of substitution patterns afforded easy access to both C2/C3 and C2/C5 difunctionalized dearomative dihydrothiophenes such as I [R = Ph, 3-FC6H4, 2-pyridyl, etc.; R1 = OAc, OC(O)Et]. The synthetic utility of the resulting dihydrothiophenes was further demonstrated by the concise synthesis of a pyridazinone analog with interesting vasodilator activity. The results came from multiple reactions, including the reaction of 2-Pyridinylboronic acid(cas: 197958-29-5SDS of cas: 197958-29-5)

2-Pyridinylboronic acid(cas: 197958-29-5) 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. SDS of cas: 197958-29-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Oh, Sangmi; Kwon, Do Yoon; Choi, Inhee; Kim, Young Mi; Lee, Ji Young; Ryu, Jiyoung; Jeong, Hangyeol; Kim, Myung Jin; Song, Rita published an article in 2021. The article was titled 《Identification of Piperidine-3-carboxamide Derivatives Inducing Senescence-like Phenotype with Antimelanoma Activities》, and you may find the article in ACS Medicinal Chemistry Letters.COA of Formula: C5H6BNO2 The information in the text is summarized as follows:

This study evaluated the potential use of senescence-inducing small mols. in the treatment of melanoma. We screened com. available small-mol. libraries with high-throughput screening and high-content screening image-based technol. Our findings showed an initial hit with the embedded N-arylpiperidine-3-carboxamide scaffold induced senescence-like phenotypic changes in human melanoma A375 cells without serious cytotoxicity against normal cells. A focused library containing diversely modified analogs were constructed and examined to evaluate the structure-activity relationship of N-arylpiperidine-3-carboxamide derivatives starting from hit 1. This work identified a novel compound with remarkable antiproliferative activity in vitro and demonstrated the key structural moieties within. In the part of experimental materials, we found many familiar compounds, such as 2-Pyridinylboronic acid(cas: 197958-29-5COA of Formula: C5H6BNO2)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Youssef, Heba; Sedykh, Alexander E.; Becker, Jonathan; Schafer, Thomas; Taydakov, Ilya V.; Li, Huanrong R.; Mueller-Buschbaum, Klaus published an article in 2021. The article was titled 《Variable Luminescence and Chromaticity of Homoleptic Frameworks of the Lanthanides together with Pyridylpyrazolates》, and you may find the article in Chemistry – A European Journal.Related Products of 1122-54-9 The information in the text is summarized as follows:

Homoleptic, 3D coordination polymers of the formula 33∞[Ln(3-PyPz)3] and 3∞[Ln(4-PyPz)3], (3-PyPz)- = 3-(3-pyridyl)pyrazolate anion, (4-PyPz)- = 3-(4-pyridyl)pyrazolate anion, both C8H6N3-, Ln = Sm, Eu, Gd, Tb, Dy, were obtained as highly luminescent frameworks by reaction of the lanthanide metals (Ln) with the aromatic heterocyclic amine ligands 3-PyPzH and 4-PyPzH. The compounds form 2 isotypic series of 3D coordination polymers and exhibit fair thermal stability up to 360°. The luminescence properties of all 10 compounds were determined in the solid state, with an antenna effect through ligand-metal energy transfer leading to high efficiency of the luminescence displayed by good quantum yields of up to 74%. The emission is mainly based on ion-specific lanthanide-dependent intra 4f-4f transitions for Tb3+: green, Dy3+: yellow, Sm3+: orange-red, Eu3+: red. For the Gd3+-containing compounds, the yellow emission of ligand triplet-based phosphorescence is observed at room temperature and 77 K. Codoping of the Gd-containing frameworks with Eu3+ and Tb3+ allow further shifting of the chromaticity towards white light emission. The experimental part of the paper was very detailed, including the reaction process of 4-Acetylpyridine(cas: 1122-54-9Related Products of 1122-54-9)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Construction of visible-light-responsive metal-organic framework with pillared structure for dye degradation and Cr(VI) reduction》 was written by Guo, Zhifen; Zhao, Hongmei; Liu, Xin; Liang, Xiao; Wei, Hongxia; Mei, Yingchun; Xing, Hongzhu. Recommanded Product: 4-Ethynylpyridine And the article was included in Applied Organometallic Chemistry in 2020. The article conveys some information:

A water-stable mixed-linker metal-organic framework (MOF) was rationally synthesized using a controllable pillared-layer method. The prepared Co(II)-MOF shows wide-range absorption in the visible light region due to the incorporation of highly conjugated anthracene-based bipyridine ligand. Experiments suggest that the MOF is highly efficient for the photoreduction of toxic Cr(VI) ions in water under visible light. Important issues affecting photocatalytic performance, such as the influence of pH and the control of electron-hole separation by scavenger, were carefully examined Beyond Cr(VI) ions, we also explored the photocatalytic degradation performance of the MOF using a persistent azo dye as a model substrate, where H2O2-involved advanced oxidation process was applied. Control experiments suggest that the introduction of environmentally benign H2O2 significantly enhances the degradation performance due to the generation of reactive hydroxyl radicals. The study not only demonstrates the great feasibility of the preparation of a new MOF photocatalyst through a controllable pillared-layer method, but also reveals that rational functionalization of ligand in the MOF is convenient for achieving desirable applications. The experimental part of the paper was very detailed, including the reaction process of 4-Ethynylpyridine(cas: 2510-22-7Recommanded Product: 4-Ethynylpyridine)

4-Ethynylpyridine(cas: 2510-22-7) 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.Recommanded Product: 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Ring-Opened Hemiporphyrazines: Helical Molecules Exhibiting Circularly Polarized Luminescence》 was written by Tanaka, Yusuke; Murayama, Tomotaka; Muranaka, Atsuya; Imai, Eiyu; Uchiyama, Masanobu. Reference of 2,6-Diaminopyridine And the article was included in Chemistry – A European Journal in 2020. The article conveys some information:

Authors designed and synthesized a new type of small helical mol. exhibiting intense circularly polarized luminescence (CPL) (12H) by modifying a 20π-electron hemiporphyrazine with a large transition magnetic dipole moment. The hemiporphyrazine ring was opened and one addnl. pyridine unit was introduced, resulting in an overlap of two pyridine rings. X-ray structure anal. confirmed that 12H and its zinc complex (1Zn) adopt a helical geometry. A racemic mixture of 1Zn was resolved into two enantiomers ((P)- and (M)-1Zn), which exhibited CPL with a high luminescence dissymmetry factor (glum) value of ±2.1×10-2. The origin of the large glum value was rationalized by DFT calculations Helical structures could be formed in a diastereoselective manner by covalently attaching chiral units to the skeleton (1’2H and 1’Zn). 1Zn Was found to possess chiral recognition ability for amines. The experimental part of the paper was very detailed, including the reaction process 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

《Catalyst-free and solvent-free hydroboration of alkynes》 was written by Jaladi, Ashok Kumar; Choi, Hyeon Seong; An, Duk Keun. Name: 4-Ethynylpyridine And the article was included in New Journal of Chemistry in 2020. The article conveys some information:

The hydroboration of alkynes with pinacolborane (HBpin) under catalyst- and solvent-free conditions was demonstrated. Various alkynes were smoothly converted into alkenyl boronate esters in good to excellent yields at 110°C. The gram-scale hydroboration of alkynes provided the corresponding boronates, which were further utilized for various chem. transformations and coupling reactions. In the experimental materials used by the author, we found 4-Ethynylpyridine(cas: 2510-22-7Name: 4-Ethynylpyridine)

4-Ethynylpyridine(cas: 2510-22-7) 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. Name: 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Rare-Earth-Metal-Catalyzed Synthesis of Azaindolines and Naphthyridines via C-H Cyclization of Functionalized Pyridines》 was published in Advanced Synthesis & Catalysis in 2020. These research results belong to Ye, Pengqing; Shao, Yinlin; Zhang, Fangjun; Zou, Jinxuan; Ye, Xuanzeng; Chen, Jiuxi. Category: pyridine-derivatives The article mentions the following:

A rare-earth-metal-catalyzed insertion of a 2-pyridine C(sp2)-H bond into an intramol. unactivated vinyl bond was reported. This reaction provides streamlined access to a range of azaindolines in moderate to excellent yields. The salient features of this reaction include simple and mild reaction conditions, 100% atom efficiency, and wide substrate scope. This methodol. is also used to construct other nitrogen-containing compounds such as naphthyridine derivatives A plausible mechanism for the formation of azaindolines involving initial C-H bond activation by the lanthanide complex followed by C=C insertion into a Ln-C bond to form an alkyl lanthanide species that subsequently undergoes cyclization was proposed. In addition to this study using 5-Bromo-2-chloropyridine, there are many other studies that have used 5-Bromo-2-chloropyridine(cas: 53939-30-3Category: pyridine-derivatives) was used in this study.

5-Bromo-2-chloropyridine(cas: 53939-30-3) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Design, synthesis and biological evaluation of 4-aryl-5-aminoalkyl-thiazole-2-amines derivatives as ROCK II inhibitors》 was published in Bioorganic & Medicinal Chemistry in 2020. These research results belong to Ma, Shuchao; Wang, Linan; Ouyang, Ben; Fan, Meixia; Qi, Junhui; Yao, Lei. Synthetic Route of C7H7NO The article mentions the following:

A series of 4-aryl-5-aminoalkyl-thiazole-2-amines I (n = 0, 1, 2; X = N, CH; Y = N, CH; R = N,N-dimethylcarbamoyl, morpholin-4-yl, 4-methylpiperazin-1-yl, etc.; R1 = pyridin-4-yl, pyridin-3-yl, 2,3-dihydro-1,4-benzodioxin-2-yl) was designed and synthesized, and their inhibitory activity on ROCK II was screened by ELISA (ELISA). The results showed that 4-aryl-5-aminomethyl-thiazole-2-amines derivatives I had certain ROCK II inhibitory activities. Compound I (n = 1; X = N; Y = CH; R = morpholin-4-yl; R1 = 2,3-dihydro-1,4-benzodioxin-2-yl) showed ROCK II inhibitory activity with IC50 value of 20 nM.4-Acetylpyridine(cas: 1122-54-9Synthetic Route of C7H7NO) was used in this study.

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Synthetic Route of C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《The molecular dynamics of bacterial spore and the role of calcium dipicolinate in core properties at the sub-nanosecond time-scale》 were Colas de la Noue, Alexandre; Natali, Francesca; Fekraoui, Fatima; Gervais, Patrick; Martinez, Nicolas; Perrier-Cornet, Jean-Marie; Peters, Judith. And the article was published in Scientific Reports in 2020. Application In Synthesis of Picolinic acid The author mentioned the following in the article:

Abstract: Bacterial spores are among the most resistant forms of life on Earth. Their exceptional resistance properties rely on various strategies, among them the core singular structure, organization and hydration. By using elastic incoherent neutron scattering, we probed the dynamics of Bacillus subtilis spores to determine whether core macromol. motions at the sub-nanosecond timescale could also contribute to their resistance to phys. stresses. In addition, in order to better specify the role of the various spore components, we used different mutants lacking essential structure such as the coat (PS4150 mutant), or the calcium dipicolinic acid complex (CaDPA) located in the core (FB122 mutant). PS4150 allows to better probe the core′s dynamics, as proteins of the coat represent an important part of spore proteins, and FB122 gives information about the role of the large CaDPA depot for the mobility of core′s components. We show that core′s macromol. mobility is not particularly constrained at the sub-nanosecond timescale in spite of its low water content as some dynamical characteristics as force constants are very close to those of vegetative bacteria such as Escherichia coli or to those of fully hydrated proteins. Although the force constants of the coatless mutant are similar to the wild-type′s ones, it has lower mean square displacements (MSDs) at high Q showing that core macromols. are somewhat more constrained than the rest of spore components. However, no behavior reflecting the glassy state regularly evoked in the literature could be drawn from our data. As hydration and macromols.′ mobility are highly correlated, the previous assumption, that core low water content might explain spores′ exceptional resistance properties seems unlikely. Thus, we confirm recent theories, suggesting that core water is mostly as free as bulk water and proteins/macromols. are fully hydrated. The germination of spores leads to a much less stable system with a force constant of 0.1 N/m and MSDs ∼2.5 times higher at low Q than in the dormant state. DPA has also an influence on core mobility with a slightly lower force constant for the DPA-less mutant than for the wild-type, and MSDs that are ∼ 1.8 times higher on average than for the wild-type at low Q. At high Q, germinated and DPA-less spores were very similar to the wild-type ones, showing that DPA and core compact structure might influence large amplitude motions rather than local dynamics of macromols. In the part of experimental materials, we found many familiar compounds, such as Picolinic acid(cas: 98-98-6Application In Synthesis of Picolinic acid)

Picolinic acid(cas: 98-98-6) is used in the preparation of 2-Aminodihydro[1,3]thiazines as BACE 2 inhibitors and their preparation and use in the treatment of diabetes.Application In Synthesis of Picolinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem