Category: naphthyridine

In an article, author is Dhar, Arghya K., once mentioned the application of 38002-45-8, SDS of cas: 38002-45-8, Name is (3-Bromoprop-1-yn-1-yl)trimethylsilane, molecular formula is C6H11BrSi, molecular weight is 191.141, MDL number is MFCD00134460, category is naphthyridine. Now introduce a scientific discovery about this category.

Piperazine Analogs of Naphthyridine-3-carboxamides and Indole-2-carboxamides: Novel 5-HT3 Receptor Antagonists with Antidepressant-Like Activity

Series of piperazine analogs of naphthyridine-3-carboxamides and indole-2-carboxamides were designed using a ligand-based approach with consideration of the pharmacophoric requirements for 5-HT3 receptor antagonists. The title carboxamides were synthesized using appropriate synthetic routes. Initially, the 5-HT3 receptor antagonistic activity of all the compounds was determined on isolated guinea pig ileum tissue against the 5-HT3 agonist, 2-methyl-5-hydroxytryptamine, which was denoted in the form of pA(2) values. The structure-activity relationship regarding the influence of the aromatic part and basic moiety as features in the 5-HT3 pharmacophore was derived. Among all the compounds screened, the piperazine derivatives of indole-2-carboxamide 13i and naphthyridine-3-carboxamide 8h exhibited prominent 5-HT3 receptor antagonism with pA(2) values of 7.5 and 7.3, respectively. Subsequent investigation of the antidepressant activities of selected compounds in the mouse forced swim test (FST) led to the identification of the piperazine analogs of indole-2-carboxamide 13i and naphthyridine-3-carboxamide 8h as the most promising compounds. Both 13i and 8h demonstrated significant reduction in the duration of immobility as compared to the control. Importantly, none of the tested compounds affected the baseline locomotion of mice at the tested dose levels.

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Reference:
1,8-Naphthyridine – Wikipedia,
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Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 96-49-1, Name is Ethylene carbonate, SMILES is O=C1OCCO1, belongs to naphthyridine compound. In a document, author is Konovalov, Bata, introduce the new discover, Name: Ethylene carbonate.

Synthesis, cytotoxic activity and DNA interaction studies of new dinuclear platinum(ii) complexes with an aromatic 1,5-naphthyridine bridging ligand: DNA binding mode of polynuclear platinum(ii) complexes in relation to the complex structure

The synthesis, spectroscopic characterization, cytotoxic activity and DNA binding evaluation of seven new dinuclear platinum(ii) complexes Pt1-Pt7, with the general formula [{Pt(L)Cl}(2)(-1,5-nphe)](ClO4)(2) (1,5-nphe is 1,5-naphthyridine; while L is two ammines (Pt1) or one bidentate coordinated diamine: ethylenediamine (Pt2), (+/-)-1,2-propylenediamine (Pt3), trans-(+/-)-1,2-diaminocyclohexane (Pt4), 1,3-propylenediamine (Pt5), 2,2-dimethyl-1,3-propylenediamine (Pt6), and 1,3-pentanediamine (Pt7)), were reported. In vitro cytotoxic activity of these complexes was evaluated against three tumor cell lines, murine colon carcinoma (CT26), murine mammary carcinoma (4T1) and murine lung cancer (LLC1) and two normal cell lines, murine mesenchymal stem cells (MSC) and human fibroblast (MRC-5) cells. The results of the MTT assay indicate that all investigated complexes have almost no cytotoxic effects on 4T1 and very low cytotoxicity toward LLC1 cell lines. In contrast to the effects on LLC1 and 4T1 cells, complexes Pt1 and Pt2 had significant cytotoxic activity toward CT26 cells. Complex Pt1 had a much lower IC50 value for activity on CT26 cells compared with cisplatin. In comparison with cisplatin, all dinuclear Pt1-Pt7 complexes showed lower cytotoxicity toward normal MSC and MRC-5 cells. In order to measure the amount of platinum(ii) complexes taken up by the cells, we quantified the cellular platinum content using inductively coupled plasma mass spectrometry (ICP-QMS). Molecular docking studies performed to evaluate the potential binding mode of dinuclear platinum(ii) complexes Pt1-Pt7 and their aqua derivatives W1-W7, respectively, at the double stranded DNA showed that groove spanning and backbone tracking are the most stable binding modes.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 96-49-1 is helpful to your research. Name: Ethylene carbonate.

Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Safety of Benzo[d]thiazol-2-amine, 136-95-8, Name is Benzo[d]thiazol-2-amine, molecular formula is C7H6N2S, belongs to naphthyridine compound. In a document, author is Du, Mei-Ling, introduce the new discover.

New members of fluorescent 1,8-naphthyridine-based BF2 compounds: selective binding of BF2 with terminal bidentate (NNO)-N-Lambda-O-Lambda and (NCO)-C-Lambda-O-Lambda groups and tunable spectroscopy properties

Intensely luminescent 1,8-naphthyridine-BF2 complexes 1-9 containing terminal bidentate (NNO)-N-Lambda-O-Lambda and/or (NCO)-C-Lambda-O-Lambda groups are synthesized and structurally characterized by X-ray diffraction, electrospray ionization mass spectrometry, H-1 and F-19 NMR spectroscopy and elemental analysis. Complexes 1-4 are synthesized from 2-acetamino-1,8-naphthyridine derivatives by a facile route. Selective bonding modes and the chemical stability of complexes 5 and 6 obtained by reacting BF3 center dot Et2O with 1,8-naphthyridine derivatives bearing dual-functional groups ((NCO)-C-Lambda-O-Lambda and (NNO)-N-Lambda-O-Lambda) are investigated by crystal structure analysis and time-dependent density functional theory calculations. The products containing a BF2 core bound to a (NCO)-C-Lambda-O-Lambda chelating group are energetically favorable and can expand the range of derivatives by substitution at the 2-position. In this regard, a free -NH2 group at the 2-position of complex 7 obtained from 5 can be functionalized under a variety of pH conditions to generate complexes 8 and 9, which bear flexible coordination arms that can be used to recognize certain transition metals. The photophysical properties of the complexes are examined in solution and solid state at room temperature. Compared with those of the starting naphthyridine-based compounds, the naphthyridine-BF2 complexes display desirable light-absorbing properties and intense solution and solid-state emission with large Stokes shifts. Complex 4 in solution exhibited an emission quantum yield of 0.98. In complexes 5-9, the binding sites for the BF2 core change from (NNO)-N-Lambda-O-Lambda to (NCO)-C-Lambda-O-Lambda, which leads to red shifts of absorption and emission, excellent chemical stability and high emission quantum yields.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 136-95-8. Safety of Benzo[d]thiazol-2-amine.

Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 620-92-8, Name is 4,4′-Methylenediphenol, SMILES is OC1=CC=C(CC2=CC=C(O)C=C2)C=C1, belongs to naphthyridine compound. In a document, author is Kobori, Akio, introduce the new discover, HPLC of Formula: C13H12O2.

Dimer of 2,7-diamino-1,8-naphthyridine for the detection of mismatches formed by pyrimidine nucleotide bases

Discrimination of base mismatches from normal Watson-Crick base pairs in duplex DNA constitutes a key approach to the detection of single nucleotide polymorphisms ( SNPs). We have developed a sensor for a surface plasmon resonance (SPR) assay system to detect G-G, A-A, and C-C mismatch duplexes by employing a surface upon which mismatch-binding ligands (MBLs) are immobilized. We synthesized a new MBL consisting of 2,7-diamino-1,8-naphthyridine (damND) and immobilized it onto a CM5 sensor chip to carry out the SPR assay of DNA duplexes containing a single-base mismatch. The SPR sensor with damND revealed strong responses to all C-C mismatches, and sequence-dependent C-T and T-T mismatches. Compared to ND- and naphthyridine-azaquinolone hybrid (NA)-immobilized sensor surfaces, with affinity to mismatches composed of purine nucleotide bases, the damND-immobilized surface was useful for the detection of the mismatches composed of pyrimidine nucleotide bases. (C) 2008 Published by Elsevier Ltd.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 620-92-8 is helpful to your research. HPLC of Formula: C13H12O2.

Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 98796-51-1, Name is 5′-O-[Bis(4-Methoxyphenyl)phenylmethyl]-thymidine 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite], formurla is C40H49N4O8P. In a document, author is Patra, Sanjib K., introducing its new discovery. Quality Control of 5′-O-[Bis(4-Methoxyphenyl)phenylmethyl]-thymidine 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite].

Ligand assisted homolytic cleavage of the Ru-Ru single bond in [Ru-2(CO)(4)](2+) core and the chemical consequence

The Ru-Ru single bond in [Ru-2(CO)(4)(MeCN)(6)][BF4](2) remains intact in the reaction with 2-i-propyl-1,8-naphthyridine ((PrNP)-Pr-i) and the isolated product is the cis-[Ru-2((PrNP)-Pr-i)(2)(CO)(4)(OTf)(2)] (1) obtained via crystallization in the presence of [n-Bu4N][OTf]. The 2-t-butyl-1,8-naphthyridine ((BuNP)-Bu-t), on the contrary, leads to the oxidative cleavage of the Ru-Ru single bond resulting in the trans-[Ru((BuNP)-Bu-t)(2)(MeCN)(2)][BF4](2)[NC(Me)C(Me)N] (2). The anti-[NC(Me)C(Me)N](2-) is the product of the two-electron reductive coupling of two acetonitrile molecules. The phenoxo appendage in 2-(2-hydroxyphenyl)-1,8-naphthyridine (hpNP) brings the identical effect of the scission of the Ru-Ru bond but the process is non-oxidative and the product obtained is the cis-[Ru(hpNP)(2)(CO)(2)][BF4] (3). The bis-(diphenylphosphino)methane (dppm) in dichloromethane oxidatively cleave the Ru-Ru bond leading to chloro bridged [Ru(mu-Cl)(dppm)(CO)(MeCN)](2)[BF4](2) (4). All the complexes have been characterized by the spectroscopic and electrochemical measurements and their structures have been established by X-ray diffraction study. (c) 2006 Elsevier B.V. All rights reserved.

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Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 38002-45-8, Name is (3-Bromoprop-1-yn-1-yl)trimethylsilane. In a document, author is Ye, Yunfeng, introducing its new discovery. Computed Properties of C6H11BrSi.

Synthesis and crystal structure of (1,8-naphthyridine-kappa N-2,N ‘)[2-(1H-pyrazol-1-yl)phenyl-kappa N-2(2),C-1]iridium(III) hexafluoridophosphate dichloromethane monosolvate

The solvated title salt, [Ir(C9H7N2)(2)(C8H6N2)]PF6 center dot CH2Cl2, was obtained from the reaction between 1,8-naphthyridine (NAP) and an orthometalated iridium(III) precursor containing a 1-phenylpyrazole (ppz) ligand. The asymmetric unit comprises one [Ir(ppz)(2)(NAP)](+) cation, one PF6- counter-ion and one CH2Cl2 solvent molecule. The central Ir-III atom of the [Ir(ppz)(2)(NAP)](+) cation is distorted-octahedrally coordinated by four N atoms and two C atoms, whereby two N atoms stem from the NAP ligand while the ppz ligands ligate through one N and one C atom each. In the crystal, the [Ir(ppz)(2)(NAP)](+) cations and PF6- counter-ions are connected with each other through weak intermolecular C-H center dot center dot center dot F hydrogen bonds. Together with an additional C-H center dot center dot center dot F interaction involving the solvent molecule, a three-dimensional network structure is formed.

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Reference:
1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 136-95-8, Name is Benzo[d]thiazol-2-amine, SMILES is NC1=NC2=CC=CC=C2S1, belongs to naphthyridine compound. In a document, author is Bhasker, G. Vijaya, introduce the new discover, Application In Synthesis of Benzo[d]thiazol-2-amine.

Synthesis, Antibacterial Activity, and Docking Studies of Some New 2-Substituted-1,8-naphthyridine Derivatives

1,8-Naphthyridine derivatives play a very important role in the field of medicinal chemistry. 2 series of novel 2-substituted-1,8-naphthyridine derivatives (10a-10k and 15a-15e) were synthesized. All the synthesized compounds were characterized by H-1 nuclear magnetic resonance (NMR), C-13 NMR, mass, and IR spectral analysis. Further, these compounds were evaluated for their antibacterial activity. Docking studies for these title compounds are also presented in this communication.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 136-95-8 is helpful to your research. Application In Synthesis of Benzo[d]thiazol-2-amine.

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1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

In an article, author is Eweas, Ahmad F., once mentioned the application of 2835-95-2, Computed Properties of C7H9NO, Name is 5-Amino-2-methylphenol, molecular formula is C7H9NO, molecular weight is 123.15, MDL number is MFCD00043922, category is naphthyridine. Now introduce a scientific discovery about this category.

Synthesis, molecular docking of novel 1,8-naphthyridine derivatives and their cytotoxic activity against HepG2 cell lines

A series of novel 2,7-dimethyl-1,8-naphthyridine derivatives substituted with Mannich bases 2a-d, N-beta-glycosides 6a-e, 7a-e, Schiff’s bases 8a-c, pyrazolone 9, and S-alkylated derivatives 10a-c have been synthesized in good yields starting from 4-hydroxy-2,7-dimethyl-1,8-naphthyridine 1 through multi-step synthesis. The newly synthesized title compounds were evaluated for their HepG2 cell growth inhibition, the results revealed that all the tested compounds process inhibitory effects on the growth of HepG2 liver cancer cells. Compound 8b showed the highest inhibition activity against HepG2 cell line (IC50 equals 3.2 mu g/mL) among all tested compounds. The results were compared to 5-Fluorouracil (5-FU) and doxorubicin as reference drugs, (IC50 5 and 3.56 mu g/mL). Furthermore, molecular docking of compounds 3b, 6a, and 8b into the binding site of topoisomerase II was carried out. The results of the binding energy scores of these compounds were compared to the docking score of Vosaroxin, a known 1,8-naphthyridine derivative which is in clinical trials as potential anticancer drug. Compound 8b docking result revealed that it is the only tested compound that intercalate with DNA segment of the topoisomerase II, similar to Vosaroxin which was used as reference drug for docking comparison.

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1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 1588-83-6, Name is 4-Amino-3-nitrobenzoic acid, SMILES is C1=C([N+]([O-])=O)C(=CC=C1C(=O)O)N, in an article , author is Tverdokhlebov, AV, once mentioned of 1588-83-6, Product Details of 1588-83-6.

Synthesis of furo[2,3-c]-2,7-naphthyridine derivatives via domino heterocyclization reaction

2-Amino-4-cyanomethyl-6-dialkylamino-3,5-pyridinedicarbonitriles were found to react with substituted oxiranes yielding 5,6-diamino-8-dialkylamino-1,2-dihydrofuro [2,3-c]-2,7-naphthyridine-9-carbonitriles. The oxirane ring was shown to be opened selectively from the unsubstituted side and further cyclization occurred with participation of 3-CN, but not 5-CN of the starting pyridines. The furonaphthyridines obtained were converted into 2-dialkylamino-5-methyl-9,10-dihydro-4H-furo[2,3-c]pyrimido[4,5,6-ij]-2,7-naphthyridine-l-carbonitriles and 2-dialkylamino-5,6,9,10-tetrahydro-4H-spiroffuro[2,3-c]pyrimido[4,5,6-ij]-2,7-naphthyridine-5,1′-cyclohexane}1-carbonitriles by treatment with acetic anhydride and cyclohexanone, respectively. The structure of prepared compounds was confirmed unambiguously by X-ray crystallographic study. (c) 2005 Elsevier Ltd. All rights reserved.

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1,8-Naphthyridine – Wikipedia,
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Synthesis, optical characterization, and TD-DFT studies of novel mero/bis-mero cyanine dyes based on N-bridgehead heterocycles

Novel mero/bis-mero cyanine dyes based on N-bridgehead imidazo[1,2-g] quinolino[2,1-a][2,6] naphthyridine have been synthesized and characterized to evaluate intramolecular charge transfer (ICT) effect on the energy gap (E0-0). The UV-vis and emission spectral studies revealed that dyes are absorbed in the region of lambda(max) 485-577 nm and emitted at 567-673 nm. Their solvatochromic behavior in solvents of various polarities, CCl4, C6H6, H2O, CHCl3, acetone, and DMF, was studied to emphasize the effect of solvent polarity on the absorption maxima, molar extinction coefficients of the dyes, and excitation energy of the dyes. Their electron cloud delocalization in HOMO/LUMO levels were studied by DFT using Gaussian 09 software. Time-dependent density functional theory (TD-DFT) was applied to theoretically explore the first excitation energy (E0-0) of these dyes, which was in good agreement with experimental results.

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1,8-Naphthyridine – Wikipedia,
,1,8-Naphthyridine | C8H6N2 – PubChem