Month: October 2022

Safety of Methyl 5-bromopicolinateIn 2016 ,《A Convenient Process for the Preparation of Heteroaryl Trifluoromethyl Selenoethers》 was published in Chinese Journal of Chemistry. The article was written by Tian, Qinli; Weng, Zhiqiang. The article contains the following contents:

The preparation of heteroaryl trifluoromethyl selenoethers RSeCF3 (R = 3-methoxypyridin-5-yl, imidazo[1,2-a]pyrazin-6-yl, 6-methoxybenzo[d]thiazol-2-yl, etc.) by the trifluoromethylselenolation of heteroaryl bromides RBr with [(bpy)CuSeCF3]2 was investigated. A large number of trifluoromethylselenolated heterocyclic compounds were synthesized in good to excellent yields using this approach. It was demonstrated that this procedure tolerates a wide variety of functional groups. In the experiment, the researchers used many compounds, for example, Methyl 5-bromopicolinate(cas: 29682-15-3Safety of Methyl 5-bromopicolinate)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Fluorescent recognition of L- and D-tryptophan in water by micelle probes》 was written by Du, Gengyu; Mao, Yifan; Abed, Mehdi A.; Pu, Lin. Recommanded Product: 31106-82-8This research focused onzinc tryptophan water fluorescent recognition micelle probe. The article conveys some information:

A series of BINOL-based monoaldehydes have been designed and synthesized as fluorescent probes for L- and D-tryptophan. It is found that in the presence of a diblock copolymer PEG-PLLA, these probes can be encapsulated into micelles which in combination with Zn2+ have exhibited chemo- and enantioselective fluorescent enhancement with tryptophan in aqueous media. In the experimental materials used by the author, we found 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Recommanded Product: 31106-82-8)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Recommanded Product: 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Synthesis of unsymmetrical urea from aryl- or pyridyl carboxamides and aminopyridines using PhI(OAc)2via in situ formation of aryl- or pyridyl isocyanates》 was published in New Journal of Chemistry in 2021. These research results belong to Laha, Joydev K.; Singh, Neha; Hunjan, Mandeep Kaur. COA of Formula: C5H5BrN2 The article mentions the following:

A tandem synthesis of unsym. ureas (N-aryl-N’-pyridylurea and N,N’-bipyridylurea) from aryl- or pyridyl carboxamides and aminopyridines via Hofmann rearrangement has been reported. In particular, benzamides, picolinamide, nicotinamide, and isonicotinamide generate reactive intermediate isocyanates, in situ, in the presence of PhI(OAc)2, which upon further reaction with aminopyridines form urea derivatives As the formation of pyridylisocyanates from their corresponding carboxamides via Hofmann rearrangement remained unexplored previously, attempts have been made to trap the isocyanates. While the three pyridylisocyanates were trapped as their corresponding carbamates, 3-pyridylisocyanate was isolated and characterized. Unlike closely related previous methods reported for urea synthesis, the current method avoids direct use of isocyanates or eliminates the use of toxic phosgene for the in situ generation of isocyanates. In the experimental materials used by the author, we found 2-Bromopyridin-3-amine(cas: 39856-58-1COA of Formula: C5H5BrN2)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Large quantities of aliphatic amines are made synthetically. The most widely used industrial method is the reaction of alcohols with ammonia at a high temperature, catalyzed by metals or metal oxide catalysts (e.g., nickel or copper). Mixtures of primary, secondary, and tertiary amines are thereby produced.COA of Formula: C5H5BrN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Synthesis, characterization, DNA interaction and docking studies of novel Schiff base ligand derived from 2,6-diaminopyridine and its complexes》 was written by Kurt, Baris; Temel, Hamdi; Atlan, Metin; Kaya, Savas. Category: pyridine-derivativesThis research focused ontransition metal Schiff diaminopyridine hydroxynaphthalenylmethylideneaminophenylethanone complex preparation thermal stability; magnetic susceptibility DNA binding transition metal Schiff diaminopyridine hydroxynaphthalenylmethylideneaminophenylethanone. The article conveys some information:

In this study 1-(4-{[(3-hydroxynaphthalen-2-yl)methylidene]amino}phenyl)ethan-1-one (B1 ligand) were synthesized from the reaction of 2-hydroxy-1-naphthaldehyde with 4-amino-acetophenone. Following that 1-(N-{4-[(1)-1-({6-[(Z)-[1-(4-{[(3- hydroxynaphthalen-2-yl) methylidene]amino}phenyl)ethylidene]amino]pyridin-2- yl}imino)ethyl]phenyl}carboximidoyl)naphthalen-2-ol (L1 ligand) were synthesized from the reaction of 2,6-diamino pyridine with B1 ligand. Using this Schiff base ligand Cu(II), Fe(II) and Pd(II) complexes were prepared The structure of the ligand and its complexes were determined by 1H NMR, FTIR, UV-Vis, elemental anal., thermal analyses and magnetic susceptibility spectral data. Further, DNA binding properties of the ligand and its metal complexes were investigated and docking studies were carried out. As a result ligands and copper complex showed DNA binding activity and an increase with H2O2. According to these results it can be suggested that these compounds are very suitable drug candidates. The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6Category: pyridine-derivatives)

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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Tris(2-pyridyl) Bismuthines: Coordination Chemistry, Reactivity, and Anion-Triggered Pyridyl Coupling》 was written by Garcia-Romero, Alvaro; Plajer, Alex J.; Miguel, Daniel; Wright, Dominic S.; Bond, Andrew D.; Alvarez, Celedonio M.; Garcia-Rodriguez, Raul. Application In Synthesis of 2-Bromo-5-methylpyridineThis research focused ontris pyridyl bismuthine complex lithium silver mol structure iron; reductive elimination gold. The article conveys some information:

A series of new tris(2-pyridyl) bismuthine ligands of the type [Bi(2-py’)3] have been prepared, containing a range of substituents at various positions within their pyridyl rings (py’). They can act as intact ligands or, as a result of the low C-Bi bond energy, exhibit noninnocent reactivity in the presence of metal ions. Structural studies of Li+ and Ag+ complexes show that the coordination to metal ions using their pyridyl-N atoms and to anions using the Lewis acidity of their Bi(III) centers can be modified by the presence of substituents within the 2-pyridyl rings, especially at the 6- or 3-positions, which can block the donor-N or Lewis acid Bi sites. Electron withdrawing groups (like CF3 or Br) can also severely reduce their ability to act as ligands to metal ions by reducing the electron donating ability of the pyridyl-N atoms. Noninnocent character is found in the reactions with Cu+ and Cu2+, resulting in the coupling of pyridyl groups to form bipyridines, with the rate of this reaction being dependent on the anion present in the metal salts. This leads to the formation of Bi(III)/Cu(I) complexes containing hypervalent [X2Bi(2-R-py)]- (X = Cl, Br) anions. Alternatively, the tris(2-pyridyl) bismuthine ligands can act as 2-pyridyl transfer reagents, transferring 2-py groups to Au(I) and Fe(II). A series of tris(2-pyridyl) bismuthine ligands have been prepared whose cation and anion coordination properties can be controlled by substitution in the Py ring. They can act as intact ligands and display noninnocent reactivity, such as acting as 2-pyridyl transfer reagents and, as a result of the Lewis acidity of their Bi(III) centers, exhibiting anion dependent reactivity. The experimental process involved the reaction of 2-Bromo-5-methylpyridine(cas: 3510-66-5Application In Synthesis of 2-Bromo-5-methylpyridine)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Application In Synthesis of 2-Bromo-5-methylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Visible-Light-Promoted Oxo-difluoroalkylation of Alkenes with DMSO as the Oxidant》 was written by Xia, Zi-Hao; Gao, Zhong-Hua; Dai, Lei; Ye, Song. Product Details of 94928-86-6This research focused onvisible light promoted oxo difluoroalkylation alkene DMSO oxidant. The article conveys some information:

Visible-light-promoted oxo-difluoroalkylation (acetylation and acetamidation) of alkenes with DMSO as both the solvent and the oxidant was developed, affording the corresponding α,α-difluoro-γ-ketoacetates and acetamides in modest yields. Both terminal and internal alkenes worked well for the reaction. This reaction features simple starting materials, a green oxidant, mild reaction conditions, and highly functional products. The experimental part of the paper was very detailed, including the reaction process of fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Product Details of 94928-86-6)

fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Product Details of 94928-86-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of C20H14N4On May 31, 2020, Chen, Hong-Shuo; Guo, Rui-Yun; Zhang, Qi-Ming; Liu, Yang-Sheng published an article in Monatshefte fuer Chemie. The article was 《Tunable solid-state photochromism based on proton and anion-controlled structural transformation of pyridinium-based organic small molecules》. The article mentions the following:

An organic mol. system with proton and anion-tunable photochromism properties based on a pyridinium derivative was developed. Through controlling the pH value and anion nature of the self-assembled systems, the novel three compounds displayed different photochromism behaviors. This work reveals that the introduction of addnl. groups into the mol. increases the diversity of the property of such complexes. In the experiment, the researchers used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Synthetic Route of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) 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. Synthetic Route of C20H14N4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dumur, Frederic; Guerlin, Audrey; Lehoux, Anais; Selvakannan, P. R.; Miomandre, Fabien; Meallet-Renault, Rachel; Rebarz, Mateusz; Sliwa, Michel; Dumas, Eddy; Le Pleux, Loic; Pellegrin, Yann; Odobel, Fabrice; Mayer, Cedric R. published an article in Applied Surface Science. The title of the article was 《Mutual influence of gold and silver nanoparticles on Tris-(2,2’bipyridine)-Ru(II) core complexes: Post-functionalization processes, optical and electrochemical investigations》.Related Products of 138219-98-4 The author mentioned the following in the article:

The synthesis, reactivity and properties of a series of four polypyridyl ruthenium complexes have been studied. These complexes were used to post-functionalize preformed 3 nm silver and gold nanoparticles (NPs) in water and in dichloromethane (DCM). We studied the influence of the grafted complexes on the formation process and stability of the colloidal solutions and we investigated the optical and electrochem. properties of the final nanocomposites. Among the series of four ruthenium complexes, three novel heteroleptic complexes (1-3) bearing one pyridine, one amine or two carboxydithioic acid pendant groups were synthesized and reacted with preformed Au-NPs and Ag-NPs. Results were compared to those obtained with the model [Ru(bpy)3]2+ complex (4). The strength of the interaction between the anchoring group and the surface of NPs influenced the size, shape and stability of the final nanocomposites. Polar solvent such as water induced aggregation and lead to unstable nanocomposites. Stationary and time resolved luminescence of grafted nanocomposites (1-3) showed that the luminescence of complexes were completely quenched (lifetime and emission quantum yield) in water by electron transfer processes, moreover elec. measurements rationalize that Ag nanocomposites exhibit the stronger quenching due to a lower oxidation potential. It also showed a current enhancement associated with double layer charging of the metal nanoparticle cores. The results came from multiple reactions, including the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Related Products of 138219-98-4)

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. Related Products of 138219-98-4The 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

In 2020,New Journal of Chemistry included an article by Romito, Deborah; Biot, Nicolas; Babudri, Francesco; Bonifazi, Davide. Application of 39856-58-1. The article was titled 《Non-covalent bridging of bithiophenes through chalcogen bonding grips》. The information in the text is summarized as follows:

In this work, chalcogen functionalized dithiophenes, equipped on both extremities with chalcogen-bonding recognition heterocycles, have been prepared following two synthetic pathways. The insertion of the chalcogenazolo[5,4-β]pyridine allows the control of the organization at the solid state. X-Ray diffraction anal. of the single crystals, showed that the Te-doped derivatives give the most persistant assemblies, with the mols. arranging at solid-state in wire-like polymeric structures through Te···N interactions. As expected, the introduction of the Se and Te atoms, dramatically decreases the emission properties, with the Te-bearing congeners being virtually non emissive. In the experiment, the researchers used 2-Bromopyridin-3-amine(cas: 39856-58-1Application of 39856-58-1)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Amines characteristically form salts with acids; a hydrogen ion, H+, adds to the nitrogen. With the strong mineral acids (e.g., H2SO4, HNO3, and HCl), the reaction is vigorous. Salt formation is instantly reversed by strong bases such as NaOH. Neutral electrophiles (compounds attracted to regions of negative charge) also react with amines; alkyl halides (R′X) and analogous alkylating agents are important examples of electrophilic reagents.Application of 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2021,Materials Chemistry Frontiers included an article by Luo, Dong; Zuo, Tao; Zheng, Ji; Long, Zi-Hao; Wang, Xue-Zhi; Huang, Yong-Liang; Zhou, Xiao-Ping; Li, Dan. Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine. The article was titled 《Enabling photocatalytic activity of [Ru(2,2′:6′,2′′-terpyridine)2]2+ integrated into a metal-organic framework》. The information in the text is summarized as follows:

As a creation platform for multifunctional materials, crystalline metal-organic frameworks (MOFs) can integrate different chromophores through reticular chem. to adjust their spatial arrangement and intermol. interaction, in turn achieving the purpose of improving the nature of optoelectronic properties. Herein, a stepwise reticular synthesis approach is successfully used to construct a multicomponent MOF, in which the well-known bis-terpyridyl ruthenium chromophore is orderly arranged into the skeleton of the material. Remarkably, this method promotes the excited state lifetime of the bis-terpyridyl ruthenium core, by two orders of magnitude (from 0.39 to 22.09 ns), to the extent that it can produce singlet oxygen under visible light irradiation at room temperature Meanwhile, the obtained multicomponent MOF has been established to have considerable porosity for exposure of substrates to the catalytic sites, rendering it suitable for heterogeneous photocatalysis, including as a photooxidation detoxifier for sulfur mustard simulant. Moreover, DFT and TDDFT calculations reveal that the synergistic charge transfer among different components in the MOF may play a crucial role in improving the excited state properties of the bis-terpyridyl ruthenium motif. After reading the article, we found that the author used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) 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. Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem