Tag: 100-200

Synthesis of orotidine by intramolecular nucleosidation was written by Kim, E.-K.;Krishnamurthy, R.. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2015.Quality Control of Pyridinehydrochloride This article mentions the following:

An intramol. nucleosidation approach provides easy access to orotidine in high yields. Notably, orotate itself is used as a leaving group at the anomeric position. This method has the potential for facile access to derivatives of orotidine of therapeutic interest, with implications for prebiotic formation of nucleosides. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Quality Control of Pyridinehydrochloride).

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Quality Control of Pyridinehydrochloride

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Effect of microwave heating on Ullmann-type heterocycle-aryl ether synthesis using chloro-heterocycles was written by D’Angelo, Noel D.;Peterson, Joseph J.;Booker, Shon K.;Fellows, Ingrid;Dominguez, Celia;Hungate, Randall;Reider, Paul J.;Kim, Tae-Seong. And the article was included in Tetrahedron Letters in 2006.Application of 4783-68-0 This article mentions the following:

Ullmann ether synthesis was conducted on a variety of chloro-heterocycles with different phenols using optimized conditions involving copper powder and cesium carbonate. On many substrates, microwave heating afforded higher yields in significantly shorter reaction times compared to conventional heating conditions. These findings provide a facile method for aryl ether synthesis from chloropyridines, chloroquinolines, and chlorobenzothiazoles. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Application of 4783-68-0).

2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the 闂?bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the 闂?bonds. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Application of 4783-68-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dicationic pyridinium salts as new organic ionics: Changes in solid-state phases and thermal/electrochemical properties was written by Shin, Jong Chan;Lim, Seok-In;Jeong, Kwang-Un;Shim, Joong Pyo;Lee, Minjae. And the article was included in Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) in 2022.Category: pyridine-derivatives This article mentions the following:

To explore a new family of organic ionic materials, a series of 婵?闂?bis[N,N’-(4-alkylpyridinium)]alkane salts I [R = Me, Et, n-hexyl, etc.; n = 2,3,4] combined with iodide (I^–), tetrafluoroborate (BF₄^–), and bis(trifluoromethanesulfonyl)imide (Tf₂N^–) anions and alkylene bridges of different lengths were synthesized. From ¹H NMR chem. shift changes, the proton acidity of at the bis-pyridinium cations could be estimated for different anions. All the synthesized I^– and BF^-4 salts had one or multiple solid-solid phase transitions, which were typical features of plastic and liquid crystals. The I^– or BF^-4 salts with large values (>90 J mol^-1 K^-1) of total entropy changes in solid-solid phase transitions had a very soft crystalline phase. Combined with polarized microscope images and wide-angle X-ray diffraction spectra, 1,2-bis[N,N’-(4-n-dodecylpyridinium)]ethane 2BF₄^– might be a true plastic crystal. The thermal properties of the bis-pyridinium Tf₂N^– salts were quite different; they showed only a melting transition and are thermally more stable than those of I^– and BF₄^–. The electrochem. window of the bis-pyridinium BF₄^– and Tf₂N^– salts was stable up to 4.3 V (vs. Li/Li⁺). In the experiment, the researchers used many compounds, for example, 4-Hexylpyridine (cas: 27876-24-0Category: pyridine-derivatives).

4-Hexylpyridine (cas: 27876-24-0) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

1-Deaza-6-methylthiopurine ribonucleoside was written by Montgomery, John A.;Hewson, Kathleen. And the article was included in Journal of Medicinal Chemistry in 1966.Safety of 2-Chloro-4-methoxy-3-nitropyridine This article mentions the following:

7-Methylthio-3-闁?D-ribofuranosyl-3H-imidazo-[4,5-b]pyridine (I), the 1-deaza analog of the highly cytotoxic 6-methylthiopurine ribonucleoside, was prepared in two ways. In the first method, 2-amino-4-chloro-3-nitropyridine, the minor product of the amination of 2,4-dichloro-3-nitropyridine, was converted in three steps to 7-chloro-3-闁?D-ribofuranosyl-3H-imidazo [4,5-b]pyridine, which was allowed to react with NaSMe to give I. In the second method, 2,4-dichloro-3-nitropyridine was allowed to react with NaSMe to give 2-chloro-4-methylthio-3-nitropyridine, which was then converted in three steps to 7-methylthio-3H-imidazo[4,5-b]pyridine (II). Fusion of II with tetra-O-acetyl-D-ribofuranose gave predominantly the tri-O-acetyl derivative of I from which the acetyl groups were removed by treatment with methanolic ammonia. Although much less cytotoxic than 6-methylthiopurine ribonucleoside, I was cytotoxic to HEp-2 cells resistant to 6-mercaptopurine. In the experiment, the researchers used many compounds, for example, 2-Chloro-4-methoxy-3-nitropyridine (cas: 6980-09-2Safety of 2-Chloro-4-methoxy-3-nitropyridine).

2-Chloro-4-methoxy-3-nitropyridine (cas: 6980-09-2) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of 闂?8.7 闂?10闂? cm3闁荤姾娅ｅΛ纭俵闂?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ闁荤姾娅ｅΛ纭俵闂? in the liquid phase and 140.4 kJ闁荤姾娅ｅΛ纭俵闂? in the gas phase. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Safety of 2-Chloro-4-methoxy-3-nitropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis of a Series of Structurally Diverse MB327 Derivatives and Their Affinity Characterization at the Nicotinic Acetylcholine Receptor was written by Rappenglueck, Sebastian;Sichler, Sonja;Hoefner, Georg;Wein, Thomas;Niessen, Karin V.;Seeger, Thomas;Paintner, Franz F.;Worek, Franz;Thiermann, Horst;Wanner, Klaus T.. And the article was included in ChemMedChem in 2018.Product Details of 644-98-4 This article mentions the following:

A novel series of 30 sym. bispyridinium and related N-heteroaromatic bisquaternary salts with a propane-1,3-diyl linker was synthesized and characterized for their binding affinity at the MB327 binding site of nicotinic acetylcholine receptor (nAChR) from Torpedo californica. Compounds targeting this binding site are of particular interest for research into new antidotes against organophosphate poisoning, as therapeutically active 4-tert-butyl-substituted bispyridinium salt MB327 was previously identified as a nAChR re-sensitizer. Efficient access to the target compounds was provided by newly developed methods enabling N-alkylation of sterically hindered or electronically deactivated heterocycles exhibiting a wide variety of functional groups. Determination of binding affinities toward the MB327 binding site at the nAChR, using a recently developed mass spectrometry (MS)-based Binding Assay, revealed that several compounds reached affinities similar to that of MB327 (pK_i=4.73闂?.03). Notably, the newly prepared lipophilic 4-tert-butyl-3-phenyl-substituted bispyridinium salt PTM0022 (3 h) was found to have significantly higher binding affinity, with a pK_i value of 5.16闂?.07, thus representing considerable progress toward the development of more potent nAChR re-sensitizers. In the experiment, the researchers used many compounds, for example, 2-Isopropylpyridine (cas: 644-98-4Product Details of 644-98-4).

2-Isopropylpyridine (cas: 644-98-4) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of 闂?8.7 闂?10闂? cm3闁荤姾娅ｅΛ纭俵闂?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ闁荤姾娅ｅΛ纭俵闂? in the liquid phase and 140.4 kJ闁荤姾娅ｅΛ纭俵闂? in the gas phase. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Product Details of 644-98-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Flavor and elementary analysis of the wild Tremellodon gelatinosum from Yunnan was written by Du, Ping;Zhang, Xian-jun;He, Su-fang;Sun, Hui. And the article was included in Linchan Huaxue Yu Gongye in 2010.Reference of 823-61-0 This article mentions the following:

Unique flavor and elements components of wild Tremellodon gelatinosum in Yunnan were investigate by using GC-MS, amino acid analyzer and ICP-MS anal. The results showed that under room temperature there are 42 volatile aroma matters (mainly alkyl alcs., alkenes and heterocyclic compounds), 17 non-volatile active matters (amino acid), 10 microelements and 9 rare-earth elements in wild T. gelatinosum. This indicates that T. gelatinosum possesses high nutritional value and medicinal value. In the experiment, the researchers used many compounds, for example, 3,6-Dimethyl-2-pyridinamine (cas: 823-61-0Reference of 823-61-0).

3,6-Dimethyl-2-pyridinamine (cas: 823-61-0) belongs to pyridine derivatives. Pyridine has a conjugated system of six 闂?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H闂佹椿浜滈妴鍗l criteria for aromatic systems. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Reference of 823-61-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Non-peptidic 婵?sub>v闁?sub>3 antagonists containing indol-1-ylpropionic acids was written by Leonard, Kristi;Pan, Wenxi;Anaclerio, Beth;Gushue, Joan M.;Guo, Zihong;DesJarlais, Renee L.;Chaikin, Marge A.;Lattanze, Jennifer;Crysler, Carl;Manthey, Carl L.;Tomczuk, Bruce E.;Marugan, Juan Jose. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2005.COA of Formula: C6H6N2O3 This article mentions the following:

The synthesis and structure/activity relationship of RGD mimetics that are potent inhibitors of the integrin 婵?sub>v闁?sub>3 are described. Indol-1-ylpropionic acids containing a variety of basic moieties at the 5-position, as well as substitutions alpha and beta to the carboxy terminus were synthesized and evaluated. Novel compounds with improved potency have been identified. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2COA of Formula: C6H6N2O3).

3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C闂備胶鍋ㄩ崕鎻掝嚕?in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.COA of Formula: C6H6N2O3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Solvation Model for Chloroform Based on Class IV Atomic Charges was written by Giesen, David J.;Chambers, Candee C.;Cramer, Christopher J.;Truhlar, Donald G.. And the article was included in Journal of Physical Chemistry B in 1997.Recommanded Product: 4-Hexylpyridine This article mentions the following:

We present a parametrization of the SM5.4 solvation model, previously applied to aqueous solutions and general organic solvents, for predicting free energies of solvation in chloroform. As in all SM5 models, the calculations are based on a set of geometry-based functional forms for parameterizing at. surface tensions of organic solutes. In particular, the at. surface tensions depend in some cases on distances to nearby atoms. Combining the at. surface tensions with electrostatic effects included in a Fock operator by the generalized Born model enables one to calculate free energies of solvation by a quantum mech. self-consistent reaction field method. At. charges are obtained by both the AM1-CM1A and PM3-CM1P class IV charge models, which yield similar results, and hence the same at. radii and similar surface tension coefficients are used with both charge models. Exptl. free energies of solvation and free energies of transfer from aqueous solution are used to parametrize the theory for chloroform. The parametrization is based on a set of 205 neutral solutes containing H, C, N, O, F, S, Cl, Br, and I that we used previously to parameterize a model for general organic solvents plus 32 addnl. solutes added for this study. For the present parameterization, we used free energies of solvation in chloroform for 88 solutes, free energies of solvation in other solvents for 123 solutes, and free energies of transfer from water to chloroform for 26 other solutes. We obtained a mean unsigned error in the free energies of solvation in chloroform of 0.43 kcal/mol using CM1A at. charges and 0.34 kcal/mol using CM1P at. charges. In the experiment, the researchers used many compounds, for example, 4-Hexylpyridine (cas: 27876-24-0Recommanded Product: 4-Hexylpyridine).

4-Hexylpyridine (cas: 27876-24-0) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the 闂?bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the 闂?bonds. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Recommanded Product: 4-Hexylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Investigation of DNA/BSA binding and cytotoxic properties of new Co(II), Ni(II) and Cu(II) hydrazone complexes was written by Kanchanadevi, Sivaswamy;Fronczek, Frank R.;Immanuel David, Charles;Nandhakumar, Raju;Mahalingam, Viswanathan. And the article was included in Inorganica Chimica Acta in 2021.SDS of cas: 91-02-1 This article mentions the following:

Two mononuclear complexes of Co(II) (1) and Ni(II) (2) and a chloro bridged binuclear copper(II) complex (3) of 2-benzoylpyridine-4-methoxybenzoylhydrazone have been synthesized in order to explore their biol. activities, such as DNA binding, protein-binding, antioxidant activity and anticancer activity. Anal. and spectroscopic techniques have been used to characterize the complexes. The mol. structures of 2 and 3 have been obtained by single crystal XRD. Interaction of the ligand and the complexes with calf thymus DNA (CT-DNA) has been explored by absorption and emission titrations, which revealed that the compounds interacted with CT-DNA through intercalation. Absorption titration and biol. studies revealed that the complexes interact with BSA through different binding modes to different extents. The radical scavenging ability of the ligand and the complexes was studied against DPPH radicals. The ligand and its metal complexes were tested for potential cytotoxicity towards human breast cancer (MCF-7) and lung cancer (A-549) cell lines. In the experiment, the researchers used many compounds, for example, Phenyl(pyridin-2-yl)methanone (cas: 91-02-1SDS of cas: 91-02-1).

Phenyl(pyridin-2-yl)methanone (cas: 91-02-1) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.SDS of cas: 91-02-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Fluorocarbon derivatives of nitrogen. Part 11. Synthesis of some 2-(trifluoromethyl)imidazo[1,2-a]pyridines from trifluoroacetonitrile was written by Banks, Ronald Eric;Thomson, Julie. And the article was included in Journal of Fluorine Chemistry in 1984.HPLC of Formula: 17281-59-3 This article mentions the following:

The title compound (I; R = Me₃CO₂C), prepared from CF₃CN and pyridinium t-butoxycarbonylmethylide, reacts smoothly with CF₃CO₂H to give the acid (I; R = HO₂C), which was decarboxylated to I (R = H) on heating. The cyano derivative (I; R = cyano) can be obtained via treatment of CF₃CN with pyridinium cyanomethylide, which is sufficiently reactive to effect nucleophilic displacement of fluorine from pentafluoropyridine under mild conditions to give II. In the experiment, the researchers used many compounds, for example, 1-(Cyanomethyl)pyridin-1-ium chloride (cas: 17281-59-3HPLC of Formula: 17281-59-3).

1-(Cyanomethyl)pyridin-1-ium chloride (cas: 17281-59-3) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. HPLC of Formula: 17281-59-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem