Tag: 200-300

《Rotaxanating Metallo-supramolecular Nano-cylinder Helicates to Switch DNA Junction Binding》 was published in Journal of the American Chemical Society in 2020. These research results belong to Hooper, Catherine A. J.; Cardo, Lucia; Craig, James S.; Melidis, Lazaros; Garai, Aditya; Egan, Ross T.; Sadovnikova, Viktoriia; Burkert, Florian; Male, Louise; Hodges, Nikolas J.; Browning, Douglas F.; Rosas, Roselyne; Liu, Fengbo; Rocha, Fillipe V.; Lima, Mauro A.; Liu, Simin; Bardelang, David; Hannon, Michael J.. Safety of 2-(Bromomethyl)pyridine hydrobromide The article mentions the following:

A class of rotaxane is created, not by encapsulating a conventional linear thread, but rather by wrapping a large cucurbit[10]uril macrocycle about a three-dimensional, cylindrical, nanosized, self-assembled supramol. helicate as the axle. The resulting pseudo-rotaxane is readily converted into a proper interlocked rotaxane by adding branch points to the helicate strands that form the surface of the cylinder (like branches and roots on a tree trunk). The supramol. cylinder that forms the axle is itself a member of a unique and remarkable class of helicate metallo-drugs that bind Y-shaped DNA junction structures and induce cell death. While pseudo-rotaxanation does not modify the DNA-binding properties, proper, mech.-interlocked rotaxanation transforms the DNA-binding and biol. activity of the cylinder. The ability of the cylinder to de-thread from the rotaxane (and thus to bind DNA junction structures) is controlled by the extent of branching: fully-branched cylinders are locked inside the cucurbit[10]uril macrocycle, while cylinders with incomplete branch points can de-thread from the rotaxane in response to competitor guests. The number of branch points can thus afford kinetic control over the drug de-threading and release. In the part of experimental materials, we found many familiar compounds, such as 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Safety of 2-(Bromomethyl)pyridine hydrobromide)

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. Safety of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

SDS of cas: 1158763-55-3On March 31, 2017, Wang, Min; Wu, Chunjiang; Xu, Shan; Zhu, Yan; Li, Wei; Zheng, Pengwu; Zhu, Wufu published an article in Medicinal Chemistry (Sharjah, United Arab Emirates). The article was 《Synthesis, Biological Evaluation and Docking Studies of Sorafenib Derivatives N-(3-fluoro-4-(pyridin-4-yloxy)phenyl)-4(5)-phenylpicolinamides》. The article mentions the following:

Sorafenib is an important VEGFR2/KDR inhibitor which is widely used for the treatment of cancer. In this paper, two series of sorafenib analogs N-(3-fluoro-4-(pyridin-4-yloxy)phenyl)-4- phenylpicolinamides(13a-k) and N-(3-fluoro-4-(pyridin-4-yloxy)phenyl)-5-phenylpicolinamides (14a-k) were designed and synthesized. Their structures were confirmed by various anal. methods, such as 1 H and 13 C NMR, m.p., MS, HRMS. All of them were evaluated for IC50 values against three cancer cell lines (A549, PC-3 and MCF-7). Eleven of the synthesized compounds showed moderate to excellent cytotoxicity activity against different cancer cells, whose potency from single-digit μM to nanomolar range. And five of them were equal to more potent than sorafenib against one or more cell lines. The most promising compound 14c showed excellent antitumor activities against PC-3 and MCF-7 cell lines with IC50 values of 2.62±1.07 μM and 1.14±0.92 μM, which were 1.15 to 2.75-fold more active than sorafenib (3.03±1.01 μM, 3.14±1.65 μM), resp. Structure-activity relationships (SARs) and docking studies indicated that the replacement of diarylurea of sorafenib with phenylpicolinamide moiety benefited to the activity. The position of aryl group and the substituents of aryl group had a great influence on antitumor activity and selectivity. The aryl groups with the substitute of alkyl groups (-CH3), halogen atoms (-F,Cl) were favorable to the cytotoxicity. However, this series of compounds showed moderate activity against VEGFR2/KDR kinase. Mechanism of target compounds was not quite clear and further study will be carried out to identify the possible target.5-(3-Fluorophenyl)picolinic acid(cas: 1158763-55-3SDS of cas: 1158763-55-3) was used in this study.

5-(3-Fluorophenyl)picolinic acid(cas: 1158763-55-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. SDS of cas: 1158763-55-3The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Structures and photophysical properties of two luminescent bipyridine compounds: 2′,6′-difluoro-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine and 2′,6′-dimethoxy-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine》 was published in Acta Crystallographica, Section C: Structural Chemistry in 2020. These research results belong to Park, Ki-Min; Yang, Kiyull; Moon, Suk-Hee; Kang, Youngjin. Related Products of 626-05-1 The article mentions the following:

The title compounds, C21H13F2N3O (1) and C23H19N3O3 (2), have been synthesized by typical cross-coupling reactions. Both compounds have been characterized by single-crystal X-ray diffraction. Bipyridine 1 exhibits a fully extended structure in which the terminal pyridine rings are oriented away from each other, while bipyridine 2 displays a bent structure in which terminal pyridine rings are oriented in the same direction. Several intermol. interactions lead to the formation of two- and three-dimensional supramol. networks in the crystal structures of 1 and 2, resp. Compound 1 bears fluorine substituents and emits a strong fluorescence with λmax = 325 nm, while methoxy-substituted compound 2 displays red-shifted emissions with λmax = 366 nm. The emissions observed in both compounds originate from phenyl- and 2,3′-bipyridine-based π-π* transitions, according to theor. calculations Both compounds have high triplet energies (T1) ranging from 2.64 to 2.65 eV, which makes them potential host materials in organic light-emitting diodes (OLEDs). In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Related Products of 626-05-1)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Theoretical exploration of 2,2′-bipyridines as electro-active compounds in flow batteries》 was written by Sanchez-Castellanos, Mariano; Flores-Leonar, Martha M.; Mata-Pinzon, Zaahel; Laguna, Humberto G.; Garcia-Ruiz, Karl M.; Rozenel, Sergio S.; Ugalde-Saldivar, Victor M.; Moreno-Esparza, Rafael; Pijpers, Joep J. H.; Amador-Bedolla, Carlos. Formula: C12H10Cl2N2 And the article was included in Physical Chemistry Chemical Physics in 2019. The article conveys some information:

Compounds from the 2,2′-bipyridine mol. family were investigated for use as redox-active materials in organic flow batteries. For 156 2,2′-bipyridine derivatives reported in the academic literature, we calculated the redox potential, the pKa for the second deprotonation reaction, and the solubility in aqueous solutions Using exptl. data on a small subset of derivatives, we were able to calibrate our calculations We find that functionalization with electron-withdrawing groups leads to an increase of the redox potential and to an increase of the mol. acidity (as expressed in a reduction of the pKa value for the second deprotonation step). Furthermore, calculations of solubility in water indicate that some of the studied derivatives have adequate solubility for flow battery applications. Based on an anal. of the physico-chem. properties of the 156 studied compounds, we down-select five mols. with carbonyl- and nitro-based functional groups, whose parameters are especially promising for potential applications as neg. redox-active materials in organic flow batteries. In addition to this study using 4,4′-Bis(chloromethyl)-2,2′-bipyridine, there are many other studies that have used 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Formula: C12H10Cl2N2) was used in this study.

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Formula: C12H10Cl2N2 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 2,6-DibromopyridineIn 2020 ,《Spin transition in a ferrous chloride complex supported by a pentapyridine ligand》 appeared in Chemical Communications (Cambridge, United Kingdom). The author of the article were Boniolo, Manuel; Shylin, Sergii I.; Chernev, Petko; Cheah, Mun Hon; Heizmann, Philipp A.; Huang, Ping; Salhi, Nessima; Hossain, Kamal; Thapper, Anders; Lundberg, Marcus; Messinger, Johannes. The article conveys some information:

Ferrous chloride complexes [FeIILxCl] commonly attain a high-spin state independently of the supporting ligand(s) and temperature Herein, authors present the first report of a complete spin crossover with T1/2 = 80 K in [FeII(Py5OH)Cl]+ (Py5OH = pyridine-2,6-diylbis[di(pyridin-2-yl)methanol]). Both spin forms of the complex are analyzed by x-ray spectroscopy and DFT calculations2,6-Dibromopyridine(cas: 626-05-1Recommanded Product: 2,6-Dibromopyridine) was used in this study.

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dierks, Philipp; Kruse, Ayla; Bokareva, Olga S.; Al-Marri, Mohammed J.; Kalmbach, Jens; Baltrun, Marc; Neuba, Adam; Schoch, Roland; Hohloch, Stephan; Heinze, Katja; Seitz, Michael; Kuehn, Oliver; Lochbrunner, Stefan; Bauer, Matthias published an article in 2021. The article was titled 《Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(II) complexes》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Quality Control of 2,6-Dibromopyridine The information in the text is summarized as follows:

Two closely related FeII complexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(II) complexes. The [Fe(NN̂N̂)2]2+ pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(CN̂Ĉ)2]2+ pseudoisomer possesses a similar 3MLCT lifetime as the tris(bidentate) [Fe(CĈ)2(NN̂)]2+ complexes with four mesoionic carbenes. In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Quality Control of 2,6-Dibromopyridine)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bosch, Eric; Bowling, Nathan P.; Oburn, Shalisa M. published their research in Acta Crystallographica, Section C: Structural Chemistry in 2021. The article was titled 《Conformational control through co-operative nonconventional C-H···N hydrogen bonds》.Safety of 2,6-Dibromopyridine The article contains the following contents:

We report the design, synthesis, and crystal structure of a conjugated aryleneethynyl mol., 2-(2-{4,5-dimethoxy-2-[2-(2,3,4-trifluorophenyl)ethynyl]phenyl}ethynyl)-6-[2-(pyridin-2-yl)ethynyl]pyridine, C30H17F3N2O2, that adopts a planar rhombus conformation in the solid state. The mol. crystallizes in the space group P [inline formula omitted] , with Z = 2, and features two intramol. sp2-C-H···N hydrogen bonds that co-operatively hold the arylethynyl mol. in a rhombus conformation. The H atoms are activated towards hydrogen bonding since they are situated on a trifluorophenyl ring and the H···N distances are 2.470 (16) and 2.646 (16) Å, with C-H···N angles of 161.7 (2) and 164.7 (2)°, resp. Mol. electrostatic potential calculations support the formation of C-H···N hydrogen bonds to the trifluorophenyl moiety. Hirshfeld surface anal. identifies a self-complementary C-H···O dimeric interaction between adjacent 1,2-dimethoxybenzene segments that is shown to be common in structures containing that moiety. After reading the article, we found that the author used 2,6-Dibromopyridine(cas: 626-05-1Safety of 2,6-Dibromopyridine)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Analytical Chemistry (Washington, DC, United States) included an article by Xu, Hongkang; Zhang, Huihui; Liu, Gang; Kong, Lin; Zhu, Xiaojiao; Tian, Xiaohe; Zhang, Zhongping; Zhang, Ruilong; Wu, Zhichao; Tian, Yupeng; Zhou, Hongping. Safety of 2-(Bromomethyl)pyridine hydrobromide. The article was titled 《Coumarin-Based Fluorescent Probes for Super-resolution and Dynamic Tracking of Lipid Droplets》. The information in the text is summarized as follows:

Visualizing and dynamic tracking lipid droplets (LDs) are of great importance to biol. research. Herein, two-photon absorption fluorescent small bioprobes based on lipophilic coumarin were developed, which exhibited high selectivity toward LDs in HeLa cells. Because of good biocompatibility and excellent photostability, the probes were applied to realize specific super-resolution visualization of the intracellular LDs in HeLa cells, offering us the quant. results of the amount and diameters of LDs as well. Furthermore, the bioprobes were capable of monitoring the movements of the LDs in real time. The authors believe that bioprobes would provide new avenues to designing bioimaging and biol. diagnosis. The experimental part of the paper was very detailed, including the reaction process of 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Safety 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. Safety of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《High-turnover visible-light photoreduction of CO2 by a Re(I) complex stabilized on dye-sensitized TiO2》 were Ha, Eun-Gyeong; Chang, Jeong-Ah; Byun, Sung-Min; Pac, Chyongjin; Jang, Dong-Myung; Park, Jeunghee; Kang, Sang Ook. And the article was published in Chemical Communications (Cambridge, United Kingdom) in 2014. Name: 4,4′-Bis(chloromethyl)-2,2′-bipyridine The author mentioned the following in the article:

Hybrid systems prepared by fixing a Re(I) complex and a dye on three types of TiO2 nanoparticles in two different ways commonly revealed persistent photocatalysis of the CO2 reduction to CO with no leveling-off tendency under visible-light irradiation in DMF, giving a turnover number of ≥435. The experimental process involved the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Name: 4,4′-Bis(chloromethyl)-2,2′-bipyridine)

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. Name: 4,4′-Bis(chloromethyl)-2,2′-bipyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2016,Bremer, Paul T.; Xue, Song; Janda, Kim D. published 《Picolinic acids as β-exosite inhibitors of botulinum neurotoxin A light chain》.Chemical Communications (Cambridge, United Kingdom) published the findings.Recommanded Product: 29682-15-3 The information in the text is summarized as follows:

In developing small-mol. inhibitors of botulinum neurotoxin serotype A light chain (BoNT/A LC), substituted picolinic acids were identified. Extensive investigation into the SAR of the picolinic acid scaffold revealed 5-(1-butyl-4-chloro-1H-indol-2-yl)picolinic acid (I), which possessed low micromolar activity against BoNT/A. Kinetic and docking studies demonstrated binding of I to the β-exosite: a largely unexplored site on the LC that holds therapeutic relevance for botulism treatment. After reading the article, we found that the author used Methyl 5-bromopicolinate(cas: 29682-15-3Recommanded Product: 29682-15-3)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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. Recommanded Product: 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem