Tag: 200-300

Coordination Assemblies of Co^II/Cu^II/Zn^II/Cd^II with 2,5-Bipyridyl-1,3,4-Oxadiazole and Dicyanamide Anion: Structural Diversification and Properties was written by Du, Miao;Wang, Qian;Li, Cheng-Peng;Zhao, Xiao-Jun;Ribas, Joan. And the article was included in Crystal Growth & Design in 2010.Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole This article mentions the following:

This work presents eight coordination assemblies based on divalent metal ions (M = Co^II, Cu^II, Zn^II, and Cd^II), dicyanamide anion (N(CN)₂^–, dca), and two isomeric bent dipyridyl coligands (L), namely, 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (3-bpo) and 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (4-bpo). In the resulting crystalline materials, both bpo and dca tectons generally display the bidentate bridging fashion (except in a mononuclear species), extending the metal centers to afford diverse one-, two-, and three-dimensional (1-D, 2-D, and 3-D) coordination networks that are not commonly observed in M-dca-L systems. Notably, the inclined polycatenated 2-D → 3-D framework and 3-D polyknotting network with the unique 6-connected (4⁴.6¹¹) topol. are formed for the Cu^II and Cd^II species with dca and 4-bpo. For the polymeric Co^II and Cu^II complexes, very weak antiferromagnetic or ferromagnetic interactions are observed between the metal centers due to the μ_1,5-bridging mode of dca, and their magneto-structural correlations have been discussed in detail. The Zn^II and Cd^II complexes show solid-state fluorescent emissions at room temperature In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 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.Application In Synthesis of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Inducing Axial Chirality in a Supramolecular Catalyst was written by Wenz, Katharina Marie;Leonhardt-Lutterbeck, Guenter;Breit, Bernhard. And the article was included in Angewandte Chemie, International Edition in 2018.Computed Properties of C5H3Br2NO This article mentions the following:

A new type of ligand, which is able to form axially chiral, supramol. complexes was designed using DFT calculations Two chiral monomers, each featuring a covalently bound chiral auxiliary, form a bidentate phosphine ligand with a twisted, hydrogen-bonded backbone upon coordination to a transition metal center which results in two diastereomeric, tropos complexes. The ratio of the diastereomers in solution is very temperature- and solvent-dependent. Rhodium and platinum complexes were analyzed through a combination of NMR studies, ESI-MS measurements, as well as UV-VIS and CD spectroscopy. The chiral self-organized ligands were evaluated in the rhodium-catalyzed asym. hydrogenation of α-dehydrogenated amino acids and resulted in good conversion and high enantioselectivity. This research opens the way for new ligand designs based on stereocontrol of supramol. assemblies through stereodirecting chiral centers. In the experiment, the researchers used many compounds, for example, 2,6-Dibromo-3-hydroxypyridine (cas: 6602-33-1Computed Properties of C5H3Br2NO).

2,6-Dibromo-3-hydroxypyridine (cas: 6602-33-1) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Computed Properties of C5H3Br2NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Metallaphotoredox-Catalyzed Cross-Electrophile C_sp³-C_sp³ Coupling of Aliphatic Bromides was written by Smith, Russell T.;Zhang, Xiaheng;Rincon, Juan A.;Agejas, Javier;Mateos, Carlos;Barberis, Mario;Garcia-Cerrada, Susana;de Frutos, Oscar;MacMillan, David W. C.. And the article was included in Journal of the American Chemical Society in 2018.Safety of 2-(2-Bromoethyl)pyridine hydrobromide This article mentions the following:

A strategy for the installation of small alkyl fragments onto pharmaceutically relevant aliphatic structures has been established via metallaphotoredox catalysis. Herein, we report that tris(trimethylsilyl)silanol can be employed as an effective halogen abstraction reagent that, in combination with photoredox and nickel catalysis, allows a generic approach to C_sp³-C_sp³ cross-electrophile coupling. In this study, we demonstrate that a variety of aliphatic drug-like groups can be successfully coupled with a number of com. available small alkyl electrophiles, including Me tosylate and strained cyclic alkyl bromides. Moreover, the union of two secondary aliphatic carbon centers, a long-standing challenge for organic mol. construction, has been accomplished with a wide array of structural formats. Last, this technol. can be selectively merged with C_sp²-C_sp³ aryl-alkyl couplings to build drug-like systems in a highly modular fashion. In the experiment, the researchers used many compounds, for example, 2-(2-Bromoethyl)pyridine hydrobromide (cas: 72996-65-7Safety of 2-(2-Bromoethyl)pyridine hydrobromide).

2-(2-Bromoethyl)pyridine hydrobromide (cas: 72996-65-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Safety of 2-(2-Bromoethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Self-Assembly of Coordination Polymers from AgX (X = SbF₆^–, PF₆^–, and CF₃SO₃^–) and Oxadiazole-Containing Ligands was written by Dong, Yu-Bin;Cheng, Jun-Yan;Huang, Ru-Qi;Smith, Mark D.;Zur Loye, Hans-Conrad. And the article was included in Inorganic Chemistry in 2003.Category: pyridine-derivatives This article mentions the following:

The coordination chem. of the oxadiazole-containing rigid bidentate ligands 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (L1), 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (L2), and 2,5-bis(3-aminophenyl)-1,3,4-oxadiazole (L3) with inorganic Ag(I) salts was studied. Four new coordination polymers (1, 2, 3, and 5) and one new bimetallic macrocyclic supramol. complex (4) were synthesized from solution reactions of L1-L3 with inorganic Ag(I) salts, resp. {[Ag(L1)]SbF₆}_n (1, monoclinic, space group P2₁/c, a 6.6846(4), b 27.1113(15), c 8.6802(5) Å, β 94.1080(10)°, Z = 4) and {[Ag(L1)]PF₆}_n (2, monoclinic, space group P2₁/c, a 6.6753(3), b 27.2824(14), c 8.2932(4) Å, β 94.6030(10)°, Z = 4) were obtained from the reactions of L1 with AgSbF₆ and AgPF₆ in a CH₂Cl₂/CH₃OH mixed solvent system, resp. Compounds 1 and 2 are isostructural and feature a novel two-dimensional zeolite-like net with two different individual rings. {[Ag(L2)]SbF₆}_n (3, monoclinic, space group P2₁/c, a 5.5677(3), b 17.3378(9), c 15.6640(8) Å, β 94.4100(10)°, Z = 2) and [Ag₂(L2)₂](SbF₆)₂ (4, triclinic, space group P1̅, a 8.7221(5), b 9.2008(6), c 10.7686(7) Å, α 70.6270(10), β 75.7670(10), γ 73.7560(10)°, Z = 1) were obtained from 1-pot reaction of L2 with AgSbF₆ in a CH₂Cl₂/CH₃OH mixed solvent system. Compound 3 features a 1-dimensional chain pattern, while compound 4 adopts a novel bimetallic macrocyclic structural motif which consists of Ag₂(L2)₂ ringlike units (crystallog. dimensions, 8.06 × 7.42 Ų). {[Ag(L3)]SO₃CF₃}_n (5) is generated from L3 and AgSO₃CF₃ in a CH₂Cl₂/CH₃OH mixed solvent system and crystallizes in the unusual space group Pbcn, with a 9.8861(5), b 20.2580(10), c 17.5517(8) Å, Z = 8. It adopts novel two-dimensional sheets that are cross-linked to each other by strong interlayer N-H···O hydrogen bonding interactions into a novel H-bonded three-dimensional network. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Category: pyridine-derivatives).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. 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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

A novel class of potent NF-κB signaling inhibitors was written by Leban, Johann;Baierl, Marcel;Mies, Jan;Trentinaglia, Viola;Rath, Sandra;Kronthaler, Kerstin;Wolf, Kristina;Gotschlich, Astrid;Seifert, Markus H. J.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2007.Synthetic Route of C11H20N2O2S This article mentions the following:

A novel class of NF-κB pathway signaling inhibitors was discovered by virtual screening, medicinal chem., and QSAR anal. An initial set of compounds inhibited NF-κB signaling in a whole cell reporter gene assay in the micro-molar range. Activity was improved step by step by medicinal chem. to yield nano-molar signaling inhibitors. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1Synthetic Route of C11H20N2O2S).

tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. 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 C11H20N2O2S

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pd(II)-Catalyzed Enantioselective Desymmetrization of Polycyclic Cyclohexenediones: Conjugate Addition versus Oxidative Heck was written by Lamb, Claire J. C.;Vilela, Filipe;Lee, Ai-Lan. And the article was included in Organic Letters in 2019.Category: pyridine-derivatives This article mentions the following:

Pd(II)-catalyzed desymmetrization of polycyclic cyclohexenediones has been achieved with high enantio- and diastereoselectivities. Up to five contiguous stereocenters are desymmetrized, while simultaneously, an addnl. stereocenter is created by the enantioselective conjugate addition Surprisingly, the conjugate addition products dominate even under typical oxidative Heck conditions, and these observations may provide some insight into the competition between the two related reactions. In the experiment, the researchers used many compounds, for example, (S)-4-(tert-Butyl)-2-(4-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole (cas: 1257527-14-2Category: pyridine-derivatives).

(S)-4-(tert-Butyl)-2-(4-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole (cas: 1257527-14-2) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Development of Chemical Entities Endowed with Potent Fast-Killing Properties against Plasmodium falciparum Malaria Parasites was written by Matralis, Alexios N.;Malik, Adnan;Penzo, Maria;Moreno, Inmaculada;Almela, Maria J.;Camino, Isabel;Crespo, Benigno;Saadeddin, Anas;Ghidelli-Disse, Sonja;Rueda, Lourdes;Calderon, Felix;Osborne, Simon A.;Drewes, Gerard;Boesche, Markus;Fernandez-Alvaro, Elena;Martin Hernando, Jose Ignacio;Baker, David A.. And the article was included in Journal of Medicinal Chemistry in 2019.Formula: C11H20N2O2S This article mentions the following:

One of the attractive properties of artemisinins is their extremely fast-killing capability, quickly relieving malaria symptoms. Nevertheless, the unique benefits of these medicines are now compromised by the prolonged parasite clearance times and the increasing frequency of treatment failures, attributed to the increased tolerance of Plasmodium falciparum to artemisinin. This emerging artemisinin resistance threatens to undermine the effectiveness of antimalarial combination therapies. Herein, we describe the medicinal chem. efforts focused on a cGMP-dependent protein kinase (PKG) inhibitor scaffold, leading to the identification of novel chem. entities with very potent, similar to artemisinins, fast-killing potency against asexual blood stages that cause disease, and activity against gametocyte activation that is required for transmission. Furthermore, we confirm that selective PKG inhibitors have a slow speed of kill, while chemoproteomic anal. suggests for the first time serine/arginine protein kinase 2 (SRPK2) targeting as a novel strategy for developing antimalarial compounds with extremely fast-killing properties. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1Formula: C11H20N2O2S).

tert-Butyl 4-carbamothioylpiperidine-1-carboxylate (cas: 214834-18-1) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. 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. Formula: C11H20N2O2S

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bis(2,5-di-4-pyridyl-1,3,4-oxadiazole)silver(I) nitrate monohydrate was written by Zhang, Zhi-Hui;Li, Cheng-Peng;Tian, Yi-Ling;Guo, Ya-Mei. And the article was included in Acta Crystallographica, Section E: Structure Reports Online in 2007.Recommanded Product: 15420-02-7 This article mentions the following:

In the title mononuclear complex, [Ag(C₁₂H₈N₄O)₂]NO₃·H₂O, the Ag^I ion is coordinated linearly by two pyridyl N atoms from two crystallog. independent monodentate 2,5-di-4-pyridyl-1,3,4-oxadiazole (4-bpo) ligands. The asym. unit contains one nitrate anion and one solvent H₂O mol. In the crystal structure, nitrate anions connect to Ag^I ions via weak Ag···O interactions [Ag···O = 2.836(3) Å] and to two symmetry-related solvent H₂O mols. via O-H···O H bonds, to afford a 1-dimensional herring-bone-like motif along [100]. Significant π-π stacking interactions [Cg···Cg = 3.614(2)-3.721(2) Å, where Cg is the centroid of a pyridyl or oxadiazole ring] are also found between two adjacent 1-dimensional motifs, resulting in a double-strand supramol. array. Crystallog. data and at. coordinates are given. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Recommanded Product: 15420-02-7).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Recommanded Product: 15420-02-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Diastereoselective and E/Z-Selective Synthesis of Functionalized Quinolizine Scaffolds via the Dearomative Annulation of 2-Pyridylacetates with Nitroenynes was written by Ni, Qijian;Xu, Fangfang;Song, Xiaoxiao. And the article was included in Journal of Organic Chemistry in 2022.HPLC of Formula: 917023-06-4 This article mentions the following:

An organocatalytic Michael/aza-Michael cascade reaction was developed to build the functionalized quinolizine scaffolds I (R = H; R¹ = H, Cl, Br, Me; R² = H, Cl, Me; R³ = H, Br; RR¹ = -CH=CH-CH=CH-; R²R³ = -CH=CH-CH=CH-; R⁴ = CN, COOMe, COOn-Bu, etc.; R⁵ = pentyl, Ph, thiophen-3-yl, etc.; Ar = 3-methylphenyl, 2-naphthyl, thien-2-yl, etc.) in 60-82% yields, excellent diastereoselectivities, and E/Z selectivities. This protocol involves the [3 + 3] annulations of 2-pyridylacetates II with nitroenynes ArCH=C(NO₂)CCR⁵ through the dearomative strategy in the presence of an organic base under mild conditions. The versatile late-stage derivatizations further demonstrated the synthetic utility of this methodol. In the experiment, the researchers used many compounds, for example, Methyl 2-(5-bromopyridin-2-yl)acetate (cas: 917023-06-4HPLC of Formula: 917023-06-4).

Methyl 2-(5-bromopyridin-2-yl)acetate (cas: 917023-06-4) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). 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.HPLC of Formula: 917023-06-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Inhibition of Cancer-Associated Mutant Isocitrate Dehydrogenases: Synthesis, Structure-Activity Relationship, and Selective Antitumor Activity was written by Liu, Zhen;Yao, Yuan;Kogiso, Mari;Zheng, Baisong;Deng, Lisheng;Qiu, Jihui J.;Dong, Shuo;Lv, Hua;Gallo, James M.;Li, Xiao-Nan;Song, Yongcheng. And the article was included in Journal of Medicinal Chemistry in 2014.Recommanded Product: 717843-51-1 This article mentions the following:

Mutations of isocitrate dehydrogenase 1 (IDH1) are frequently found in certain cancers such as glioma. Different from the wild-type (WT) IDH1, the mutant enzymes catalyze the reduction of α-ketoglutaric acid to D-2-hydroxyglutaric acid (D2HG), leading to cancer initiation. Several 1-hydroxypyridin-2-one compounds were identified to be inhibitors of IDH1(R132H). A total of 61 derivatives were synthesized, and their structure-activity relationships were investigated. Potent IDH1(R132H) inhibitors were identified with K_i values as low as 140 nM, while they possess weak or no activity against WT IDH1. Activities of selected compounds against IDH1(R132C) were found to be correlated with their inhibitory activities against IDH1(R132H), as well as cellular production of D2HG, with R² of 0.83 and 0.73, resp. Several inhibitors, e.g., I, were found to be permeable through the blood-brain barrier in a cell-based model assay and exhibit potent and selective activity (EC₅₀ = 0.26-1.8 μM) against glioma cells with the IDH1 R132H mutation. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methoxy-4-methylpyridine (cas: 717843-51-1Recommanded Product: 717843-51-1).

3-Bromo-2-methoxy-4-methylpyridine (cas: 717843-51-1) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). 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. Recommanded Product: 717843-51-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem