Month: October 2022

Larsen, Christian; Lundberg, Petter; Tang, Shi; Rafols-Ribe, Joan; Sandstroem, Andreas; Mattias Lindh, E.; Wang, Jia; Edman, Ludvig published an article in 2021. The article was titled 《A tool for identifying green solvents for printed electronics》, and you may find the article in Nature Communications.Reference of fac-Tris(2-phenylpyridine)iridium The information in the text is summarized as follows:

The emerging field of printed electronics uses large amounts of printing and coating solvents during fabrication, which commonly are deposited and evaporated within spaces available to workers. It is in this context unfortunate that many of the currently employed solvents are non-desirable from health, safety, or environmental perspectives. Here, we address this issue through the development of a tool for the straightforward identification of functional and “”green”” replacement solvents. In short, the tool organizes a large set of solvents according to their Hansen solubility parameters, ink properties, and sustainability descriptors, and through systematic iteration delivers suggestions for green alternative solvents with similar dissolution capacity as the current non-sustainable solvent. We exemplify the merit of the tool in a case study on a multi-solute ink for high-performance light-emitting electrochem. cells, where a non-desired solvent was successfully replaced by two benign alternatives. The green-solvent selection tool is freely available at: www.opeg-umu.se/green-solvent-tool. In the part of experimental materials, we found many familiar compounds, such as fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Reference of fac-Tris(2-phenylpyridine)iridium)

fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) 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. Reference of fac-Tris(2-phenylpyridine)iridium

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cammack, Claudina X.; Pratt, Harry D.; Small, Leo J.; Anderson, Travis M. published an article in 2021. The article was titled 《A higher voltage Fe(II) bipyridine complex for non-aqueous redox flow batteries》, and you may find the article in Dalton Transactions.Related Products of 1134-35-6 The information in the text is summarized as follows:

Non-aqueous redox flow batteries (RFBs) offer the possibility of higher voltage and a wider working temperature range than their aqueous counterpart. Here, we optimize the established 2.26 V Fe(bpy)3(BF4)2/Ni(bpy)3(BF4)2 asym. RFB to lessen capacity fade and improve energy efficiency over 20 cycles. We also prepared a family of substituted Fe(bpyR)3(BF4)2 complexes (R = -CF3, -CO2Me, -Br, -H, -tBu, -Me, -OMe, -NH2) to potentially achieve a higher voltage RFB by systematically tuning the redox potential of Fe(bpyR)3(BF4)2, from 0.94 V vs. Ag/AgCl for R = OMe to 1.65 V vs. Ag/AgCl for R = CF3 (ΔV = 0.7 V). A series of electronically diverse sym. and asym. RFBs were compared and contrasted to study electroactive species stability and efficiency, in which the unsubstituted Fe(bpy)3(BF4)2 exhibited the highest stability as a catholyte in both sym. and asym. cells with voltage and coulombic efficiencies of 94.0% and 96.5%, and 90.7% and 80.7%, resp. The results came from multiple reactions, including the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Related Products of 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.Related Products of 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

Salomon, Fernando F.; Vega, Nadia C.; Jurado, Jose Piers; Moran Vieyra, Faustino E.; Tirado, Monica; Comedi, David; Campoy-Quiles, Mariano; Cattaneo, Mauricio; Katz, Nestor E. published an article in 2021. The article was titled 《Heteroleptic Ruthenium(II) Complexes with 2,2′-Bipyridines Having Carbonitriles as Anchoring Groups for ZnO Surfaces: Syntheses, Physicochemical Properties, and Applications in Organic Solar Cells》, and you may find the article in Inorganic Chemistry.Related Products of 1134-35-6 The information in the text is summarized as follows:

Heteroleptic ruthenium (II) complexes were used for sensitizing ZnO surfaces in organic solar cells (OSCs) as mediators with photoactive layers. The complexes [Ru(4,4′-X2-bpy)(Mebpy-CN)2]2+ (with X = -CH3, -OCH3 and -N(CH3)2; bpy = 2,2′-bipyridine; Mebpy-CN = 4-methyl-2,2′-bipyridine-4′-carbonitrile) were synthesized and studied by anal. and spectroscopical techniques. Spectroscopic, photophys., and electrochem. properties were tuned by changing the electron-donating ability of the -X substituents at the 4,4′-positions of the bpy ring and rationalized by quantum mech. calculations These complexes were attached through nitrile groups to ZnO as interfacial layer in an OSC device with a PBDB-T:ITIC photoactive layer. This modified inorganic electron transport layer generates enhancement in photoconversion of the solar cells, reaching up to a 23% increase with respect to the unsensitized OSCs. The introduction of these dyes suppresses some degradative reactions of the nonfullerene acceptor due to the photocatalytic activity of zinc oxide, which was maintained stable for about 11 mo. Improving OSC efficiencies and stabilities can thus be achieved by a judicious combination of new inorganic and organic materials. The experimental process involved the reaction of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Related Products of 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.Related Products of 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

Kumar, Ravi; Rawal, Parveen; Banerjee, Indrani; Pada Nayek, Hari; Gupta, Puneet; Panda, Tarun K. published an article in 2022. The article was titled 《Catalytic Hydroboration and Reductive Amination of Carbonyl Compounds by HBpin using a Zinc Promoter》, and you may find the article in Chemistry – An Asian Journal.Computed Properties of C7H7NO The information in the text is summarized as follows:

The chemoselective hydroboration of aldehydes and ketones, catalyzed by Zinc(II) complexes [κ2-(PyCH:NR)ZnX2] (1, R = CPh3, X = Cl; 2, R = 2,6-iPr2C6H3, X = I), by pinacolborane (HBpin) at ambient temperature and under solvent-free conditions, which produced the corresponding borate esters in high yield, is reported. Zinc metal complexes 1 and 2 were derived in 80-90% yield from the reaction of iminopyridine [PyCH:NR] with anhydrous zinc dichloride in dichloromethane at room temperature The solid-state structures of both zinc complexes were confirmed using X-ray crystallog. Zinc complex 1 was also used as a competent pre-catalyst in the reductive amination of carbonyl compounds with HBpin under mild and solvent-free conditions to afford a high yield (up to 97%) of the corresponding secondary amines. The wider substrate scope of both reactions was explored. Catalytic protocols using zinc as a pre-catalyst demonstrated an atom-economic and green method with diverse substrates bearing excellent functional group tolerance. Computational studies established a plausible mechanism for catalytic hydroboration. In the experiment, the researchers used many compounds, for example, 4-Acetylpyridine(cas: 1122-54-9Computed Properties of C7H7NO)

4-Acetylpyridine(cas: 1122-54-9) 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.Computed Properties of C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ju, Han; Hou, Lingxin; Zhao, Fabao; Zhang, Ying; Jia, Ruifang; Guizzo, Laura; Bonomini, Anna; Zhang, Jiwei; Gao, Zhen; Liang, Ruipeng; Bertagnin, Chiara; Kong, Xiujie; Ma, Xiuli; Kang, Dongwei; Loregian, Arianna; Huang, Bing; Liu, Xinyong; Zhan, Peng published an article in 2022. The article was titled 《Iterative Optimization and Structure-Activity Relationship Studies of Oseltamivir Amino Derivatives as Potent and Selective Neuraminidase Inhibitors via Targeting 150-Cavity》, and you may find the article in Journal of Medicinal Chemistry.Recommanded Product: 197958-29-5 The information in the text is summarized as follows:

With our continuous endeavors in seeking neuraminidase (NA) inhibitors, we reported herein three series of novel oseltamivir amino derivatives with the goal of exploring the druggable chem. space inside the 150-cavity of influenza virus NAs. Among them, around half of the compounds in series C were demonstrated to be better inhibitors against both wild-type and oseltamivir-resistant group-1 NAs than oseltamivir carboxylate (OSC). Notably, compounds 12d, 12e, 15e, and 15i showed more potent or equipotent antiviral activity against H1N1, H5N1, and H5N8 viruses compared to OSC in cellular assays. Furthermore, compounds 12e and 15e exhibited high metabolic stability in human liver microsomes (HLMs) and low inhibitory effect on main cytochrome P 450 (CYP) enzymes, as well as low acute/subacute toxicity and certain antiviral efficacy in vivo. Also, pharmacokinetic (PK) and mol. docking studies were performed. Overall, 12e (I) and 15e (II) possess great potential to serve as anti-influenza candidates and are worthy of further investigation. In the experiment, the researchers used many compounds, for example, 2-Pyridinylboronic acid(cas: 197958-29-5Recommanded Product: 197958-29-5)

2-Pyridinylboronic acid(cas: 197958-29-5) 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.Recommanded Product: 197958-29-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

HPLC of Formula: 98-98-6In 2021 ,《Serum protein-hyaluronic acid complex nanocarriers: Structural characterisation and encapsulation possibilities》 appeared in Carbohydrate Polymers. The author of the article were Kovacs, Alexandra N.; Varga, Norbert; Juhasz, Adam; Csapo, Edit. The article conveys some information:

A protein-polysaccharide-based potential nanocarrier system have been developed via a simple, one-step preparation protocol without the use of long-term heating and the utilization of hardly removable crosslinking agents, surfactants, and toxic organic solvents. To the best of our knowledge, this article is the first which summarizes in detail the pH-dependent quant. relationship between the bovine serum albumin (BSA) and hyaluronic acid (HyA) confirmed by several physico-chem. techniques. The formation of colloidal complex nanoconjugates with average diameter of ca. 210-240 nm is strongly depend on the pH and the applied BSA:HyA mass ratio. Particle charge titrations studies strongly support the core-shell type structure, where the BSA core is covered by a thick HyA shell. Besides the optimization of these conditions, the drug encapsulation capacity and the dissolution profiles have been also studied for ibuprofen (IBU) and 2-picolinic acid (2-PA) as model drugs. In the experimental materials used by the author, we found Picolinic acid(cas: 98-98-6HPLC of Formula: 98-98-6)

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.HPLC of Formula: 98-98-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 29682-15-3In 1997 ,《Regiospecific carboalkoxylation of 2,5-dibromopyridine》 appeared in Synthetic Communications. The author of the article were Chambers, R.J.; Marfat, A.. The article conveys some information:

Carboalkoxylation of 2,5-dibromopyridine with carbon monoxide and an alc. in the presence of palladium acetate and 1,1′-bis(diphenylphosphino)ferrocene (dppf) occurs regiospecifically to afford esters of 5-bromopyridine-2-carboxylic acid in good yield. In the part of experimental materials, we found many familiar compounds, such as Methyl 5-bromopicolinate(cas: 29682-15-3Related Products of 29682-15-3)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 5-Bromo-2-chloropyridineIn 2021 ,《Directing Group Enables Electrochemical Selectively Meta-Bromination of Pyridines under Mild Conditions》 appeared in Journal of Organic Chemistry. The author of the article were Wu, Yanwei; Xu, Shanghui; Wang, Hong; Shao, Dongxu; Qi, Qiqi; Lu, Yi; Ma, Li; Zhou, Jianhua; Hu, Wei; Gao, Wei; Chen, Jianbin. The article conveys some information:

Without the use of catalysts and oxidants, a facile and sustainable electrochem. bromination protocol was developed. By introducing the directing groups, the regioselectivity of pyridine derivatives could be controlled at the meta-position utilizing the inexpensive and safe bromine salts at room temperature A variety of brominated pyridine derivatives were obtained in 28-95% yields, and the reaction could be readily performed at a gram scale. By combining the installation and removing the directing group, the concept of meta-bromination of pyridines could be verified. After reading the article, we found that the author used 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. 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.Application In Synthesis of 5-Bromo-2-chloropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 3510-66-5In 2019 ,《A greener approach toward N-1 heteroarylation of indoles: Synthesis and in vitro evaluation of potential anti-proliferative agents》 appeared in Arabian Journal of Chemistry. The author of the article were Sailaja, E.; Bhavani, S.; Rambabu, D.; Basaveswara Rao, M. V.; Pal, Manojit. The article conveys some information:

A greener approach was developed to synthesize N-pyridyl indoles e.g., I [R1 = R2 = H, R3 = 2-pyridyl] and N-pyrimidinyl indoles e.g., I [R1 = R2 = H, R3 = 2-pyrimidinyl] via an ultrasound assisted selective N-1 heteroarylation of indoles. This methodol. involved reaction of indoles with heteroaryl halides in PEG-400 under ultrasound irradiation Compound I [R1 = R2 = H, R3 = 2-pyrimidinyl] was benzoylated at C-2 position via palladium-mediated C-H bond activation. All the synthesized N-1 heteroarylindoles were tested for their in vitro anti-proliferative properties against cancer (leukemia) and non-cancerous cell lines. Among the tested compounds, compounds I [R1 = H; R2 = 5-OMe; R3 = 2-pyridyl, 5-Me-2-pyridyl, 2-pyrimidinyl] showed promising activity against K562 leukemia cells whereas compound I [R1 = H, R2 = 5-OMe, R3 = 2-pyrimidinyl] showed significant activity against Colo-205 cells. Addnl., none of these N-heteroaryl indoles showed any effect against noncancerous HEK293 cell lines, indicating their selectivity toward cancer cells specifically leukemia. In addition to this study using 2-Bromo-5-methylpyridine, there are many other studies that have used 2-Bromo-5-methylpyridine(cas: 3510-66-5Recommanded Product: 3510-66-5) was used in this study.

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. Recommanded Product: 3510-66-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2021 ,《Visible-Light-Mediated Nitrogen-Centered Radical Strategy: Preparation of 3-Acylated Spiro[4,5]trienones》 was published in Advanced Synthesis & Catalysis. The article was written by Chen, Pu; Xie, Jun; Chen, Zan; Xiong, Bi-Quan; Liu, Yu; Yang, Chang-An; Tang, Ke-Wen. The article contains the following contents:

A nitrogen-centered radical strategy for the preparation of 3-acylated spiro[4,5]trienones I [R1 = H, 6-Me, 7-I, etc.; R2 = Me, Bn, allyl, etc.; R3 = Ph, 2-MeC6H4, 2-naphthyl, etc.; R4 = Me, Et, iPr, etc.] via visible-light-mediated acylation/ipso-cyclization of alkynes with acyl oxime esters was reported. This method provided a way for the construction of compounds I, which could introduced aryl- or alkyl-substituted acyl into spiro[4,5]trienone skeletons. In addition to this study using fac-Tris(2-phenylpyridine)iridium, there are many other studies that have used fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Category: pyridine-derivatives) was used in this study.

fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) 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. Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem