Tag: M.W=100-200

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 22047-25-2, Name is Acetylpyrazine, SMILES is C1=C(N=CC=N1)C(=O)C, in an article , author is Pan, Lei, once mentioned of 22047-25-2, Recommanded Product: Acetylpyrazine.

Oxidative Ring-Opening of 1H-Pyrazol-5-amines and Its Application in Constructing Pyrazolo-Pyrrolo-Pyrazine Scaffolds by Domino Cyclization

Herein, an oxidative ring-opening of 1H-pyrazol-5-amines to form 3-diazenylacrylonitrile derivatives under mild and transition-metal-free conditions is described. In addition, the nucleophilic addition of deprotonated 1H-pyrrole-2-carbaldehydes to the vinyl moiety of the yielded 3-diazenylacrylonitriles could trigger domino cyclization to afford the 3H-pyrazolo[3,4-e]pyrrolo[1,2-a]pyrazine derivatives. Computational studies suggest that the oxidation of 1H-pyrazol-5-amines in the presence of PhIO is through the formation of a hydroxylamine intermediate followed by elimination of H2O to result in the ring-opening product. The detailed domino cyclization pathway leading to the pyrazolo-pyrrolo-pyrazine scaffolds is revealed.

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In an article, author is Xu, Chanchan, once mentioned the application of 14508-49-7, Product Details of 14508-49-7, Name is 2-Chloropyrazine, molecular formula is C4H3ClN2, molecular weight is 114.53, MDL number is MFCD00006124, category is Pyrazines. Now introduce a scientific discovery about this category.

Synthesis, structure and photoluminescence properties of three copper(i) iodide based inorganic-organic hybrid structures with pyrazine derivatives

By using pyrazine derivatives, three different types of copper(i) iodide based inorganic-organic hybrid structures, 1D-CuI(2-mo-pz) (1, 2-mo-pz = 2-methoxy-pyrazine), 2D-CuI(2,3-dm-pz)(0.5)(2, 2,3-dm-pz = 2,3-dimethyl-pyrazine), and 2D-Cu2I2(2,5-dm-pz)(2)(3, 2,5-dm-pz = 2,5-dimethyl-pyrazine), have been obtained by using a slow-diffusion method. Single crystal and powder X-ray diffraction analyses reveal that these hybrid structures are a one-dimensional (1D) staircase chain based structure, two-dimensional (2D) staircase-chain based structure, and 2D rhomboid dimer based structure, respectively. All of the three compounds show photoluminescence, with the internal quantum yield (IQY) as high as 88.2% for1. This work provides evidence that for this type of hybrid materials, the structure of the inorganic module could be determined by the selection of the organic ligands and that the substituted group on the organic ligands can influence the luminescence efficiency of the hybrid structures.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 22047-25-2, Name is Acetylpyrazine, molecular formula is C6H6N2O. In an article, author is Khavasi, Hamid Reza,once mentioned of 22047-25-2, Safety of Acetylpyrazine.

Complementary Features of Inorganic (M-X) and Organic (C-X ‘) Halogens in C-X ‘center dot center dot center dot X-M Halogen Bonds: A Study Based on Structure, Energy, and Topological Electron Density

A family of 10 compounds, each containing a MX2-pyrazine carboxylate complex anion and a protonated halo- (X’-) amino pyridine cation (MX2 = ZnCl2, ZnBr2, ZnI2, HgBr2, and HgI2; X’ = Cl, Br, I), are presented; a suitable system for pursuing C-X’center dot center dot center dot X-M halogen bonding (XB). The influence of halogen manipulation, metal ion and coordination variation on the nature and strength of C-X’center dot center dot center dot X-M interactions was discussed in terms of geometrical parameters, binding energies and charge density analysis with emphasis on the Laplacian of the electron density, del(2)rho. Interplay of XBs with other noncovalent interactions, mainly N-H center dot center dot center dot XM and N-py-H+center dot center dot center dot O- bonds, in supramolecular assemblies, were also investigated. The C-X’center dot center dot center dot X-M and N-H center dot center dot center dot X-M bonds have rationally been modified in strength upon changing the halogens involved, leading to systematic variations in the crystal packing.

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Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 2847-30-5, Name is 2-Methoxy-3-methylpyrazine, SMILES is COC1=C(C)N=CC=N1, belongs to Pyrazines compound. In a document, author is Dagar, Anuradha, introduce the new discover, Recommanded Product: 2847-30-5.

A domino annulation approach to 3,4-diacylpyrrolo[1,2-a]pyrazines: decoration of pyrazine units

A new one-pot, sequential three-component access to 3,4-diacylpyrrolo[1,2-a]pyrazine was achieved from the reaction of an alpha-haloketone, azide, and N-substituted pyrrole-2-carboxaldehyde under mild reaction conditions, through which a polysubstitution pattern on the pyrazine moiety of the scaffold was realized. The formation of multiple bonds (one C-C and two C-N) was enabled by this domino process involving the in situ generation of alpha-iminoketones, intermolecular Mannich reaction, intramolecular imine formation, and aromatization. Construction of the relevant 3,4-diacylpyrazino[1,2-a]indole and further expansion of this chemical space via synthetic elaboration of the resulting products were demonstrated as well. Preliminary biological screening of the synthesized derivatives against oral adenosquamous carcinoma cells (CAL-27) and triple negative human breast cancer cells (MDA-MB-231) led us to identify a potent hit compound (7o) having similar to 3 times stronger in vitro anticancer activity than that of the anticancer agent, capecitabine.

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 2847-30-5 is helpful to your research. Recommanded Product: 2847-30-5.

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 33332-25-1, Name is Methyl 5-chloropyrazine-2-carboxylate, SMILES is ClC1=CN=C(C=N1)C(=O)OC, in an article , author is Layek, Ujjwal, once mentioned of 33332-25-1, Recommanded Product: Methyl 5-chloropyrazine-2-carboxylate.

Floral traits and chemical cues associated with rock bee (Apis dorsata Fabricius) for the host selection in West Bengal, India

In the present work, bee foraging plants were determined by palynological analysis of colony stored samples (honey and pollen) of Apis dorsata collected from southern West Bengal, India. Then flowering phenology and pollen morphologies were described to evaluate the forage preference of the bee species. In addition, chemical cues were analysed using gas chromatography-mass spectrometry (GC-MS). Foraging strategy of the bee species was profitable in that almost all the bee-visited plants were utilised for both nectar and pollen sources. The bee species became generalist visitor of several plants having diverse life form, flower characters and pollen morphologies. However, most of the bee-visited plants were of trees with synchronous type of flowering. Most plants had small-sized, yellow, cream and white coloured flowers and pollen was openly presented. We did not find any patterns in the morphological traits of bee collected pollen, though the pollen types were predominantly of medium sized with trizonocolporate apertural pattern and reticulate surface ornamentation. Floral volatile organic compounds (VOCs) of bee visited plants were also diversified. Compounds frequently found in the floral VOC bouquets were amphetamine-3-methyl; butane, 2-cyclopropyl; 2,3-butanediol; cyclohexan, 1-methyl-5-(1-methylethyl); d-limonene; methyl (2E)-2-methoxy-2-butenoate; phenol, 4-[2-(methylamino)ethyl]; phthalic acid, di(2-propylpentyl)ester; propanamide, N-(aminocarbonyl) and pyrrolo[1,2-a]pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl). In conclusion, floral traits and chemical cues of plants influence the host selection specificity (to collect floral rewards) of the rock bees.

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Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 14508-49-7, Name is 2-Chloropyrazine, SMILES is ClC1=CN=CC=N1, belongs to Pyrazines compound. In a document, author is Miyamoto, Masaya, introduce the new discover, Formula: C4H3ClN2.

Surface-enhanced Raman scattering of M-2-pyrazine-M-2 (M = Cu, Ag, Au): Analysis by natural perturbation orbitals and density functional theory functional dependence

Here, we propose a new method to analyze various electronic properties of molecules based on natural perturbation orbitals (NPOs). We applied the proposed method to chemical enhancement of the surface-enhanced Raman scattering (SERS) intensity of M-2-pyrazine-M-2 (M = Cu, Ag, Au) complexes. The SERS intensity can be effectively decomposed into the contributions of four NPO pairs (1 sigma-1 sigma*, 2 sigma-2 sigma*, 1 pi-1 pi*, and 2 pi-2 pi*), so NPO analysis makes the SERS intensity much easier to understand than by conventional canonical molecular orbitals. Moreover, we analyzed the dependence of the density functional theory functional on the SERS intensity. For the Ag-2-pyrazine-Ag-2 complex, the BP86 functional overestimates the Raman intensity by about 23 times compared with coupled-cluster singles and doubles level of theory, while the CAM-B3LYP functional gives moderately accurate values. This overestimation arises from the inaccuracy of the energy derivative along the normal vibrational mode.

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 14508-49-7 is helpful to your research. Formula: C4H3ClN2.

Reference of 89-01-0, Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. The appropriate choice of redox mediator can avoid electrode passivation and overpotential. 89-01-0, Name is Pyrazine-2,3-dicarboxylic acid, SMILES is O=C(C1=NC=CN=C1C(O)=O)O, belongs to Pyrazines compound. In a article, author is Nishiyama, Yoshitake, introduce new discover of the category.

Facile Synthesis of Tetraarylpyrazines by Sequential Cross-coupling Approach

A facile synthetic method for unsymmetric tetraarylpyrazines by sequential cross-couplings is disclosed. This 5-step synthesis was achieved from 2-amino-3,5-dibromo-6-chloropyrazine through four-fold cross-coupling and diazotization. Dibenzo-fused quinoxaline synthesis was also accomplished by further intramolecular coupling.

Reference of 89-01-0, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 89-01-0.

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 22047-25-2, Name is Acetylpyrazine, SMILES is C1=C(N=CC=N1)C(=O)C, belongs to Pyrazines compound. In a document, author is Bera, Pradip, introduce the new discover, Category: Pyrazines.

Induced apoptosis against U937 cancer cells by Fe(II), Co(III) and Ni(II) complexes with a pyrazine-thiazole ligand: Synthesis, structure and biological evaluation

Complexes of iron(II), cobalt(III) and nickel(II) with 4-(4-methoxyphenyl)-2-(2-(1-(pyrazin-2yl)ethylidene)hydrazinyl)thiazole (PyztH) have been synthesized and characterized by elemental analyses, spectroscopic methods, CV measurements and a DFT study. The crystal and molecular structures were determined by the X-ray diffraction method. The complexes have the compositions [Fe(Pyzt)(2)]Br-2 (1), [Co(Pyzt)(2)]PF6 (2) and [Ni(Pyzt)(PyztH)IClO4 (3), with an approximate octahedral environment around the metal centre with NNN donor atoms from the two coordinating ligands. The complexes belong to the triclinic crystal system and crystallize in the space group P-1. Complex 1 is stabilized by strong hydrogen bonds, whereas the stability of complexes 2 and 3 is associated to pi-pi stacking interactions. The chemical reactivity, frontier orbital picture and energies of the HOMO and LUMO of the complexes have been estimated by a DFT study. The complexes are redox active species and respond with a quasi-reversible redox process. The cytotoxicity of the complexes was tested against U-937 human monocytic cells and shows IC50 values of 132 (for 1), 45 (for 2) and 162 mu M (for 3). A LDH release assay indicates that 2 and 3 show apoptosis in the tumour cell. Complex 2 induces apoptosis by disrupting the mitochondrial membrane potential and homeostasis leading to cytotoxicity, as envisaged by PARP cleavage. Complexes 1, 2 and 3 show high binding constants (2.01 x 10(6) M-1 for 1, 1.18 x 10(7) M-1 for 2 and 2.90 x 10(7) M-1 for 3) with CTDNA which attest the groove binding nature of the complexes with DNA. The compounds also exhibit a remarkable zone of inhibition against specific tested bacterial and fungal strains. Based on the results, the cobalt complex (2) shows the best antitumor and antimicrobial activity among the complexes under investigation. (C) 2020 Elsevier Ltd. All rights reserved.

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 22047-25-2 is helpful to your research. Category: Pyrazines.

Let¡¯s face it, organic chemistry can seem difficult to learn, Quality Control of 2-Methoxy-3-methylpyrazine, Especially from a beginner¡¯s point of view. Like 2847-30-5, Name is 2-Methoxy-3-methylpyrazine, molecular formula is C7H8N2O2, belongs to phthalazines compound. In a document, author is Shmelev, Maxim A., introducing its new discovery.

Coordination polymers based on 3,5-di-tert-butylbenzoate {Cd2Eu} moieties

Heterometallic complex [Cd2Eu(bzo)(6)(NO3)(MeCN)(2)(THF)(2)]center dot 2EtOH was synthesized by the reaction of Cd (NO3)(2)4H(2)O and Eu(NO3)(3)6H(2)O with potassium 3,5-di-tert-butylbenzoate (Hbzo). N-Donors (L) could replace solvents in the Cd coordination environment without modifying the stable metal core {Cd2Eu(bzo)(6)(X)} (X = NO3 or bzo). The presence of pyrazine (pz) in the reaction mixture could result in the formation of either molecular [Cd2Eu(bzo)(6)(NO3)(pz)(2)(EtOH)(2)] or 1D-polymeric [Cd2Eu(bzo)(6)(NO3)(pz)(H2O)(2)]ncomplex, depending on the Cd : L molar ratio (1 : 15 and 1 : 8, respectively). Addition of bridging N-donors 4,4′-bipyridine (4,4′-bipy) and 1,2-bis(2-pyridyl)ethylene (bpe) (Cd : L = 1 : 2) gave the [Cd2Eu(bzo)7(4,4′-bipy)(H2O)(2)](n) and [Cd2Eu(bzo)(7)(bpe)(H2O)(2)](n) polymers, respectively. 4-Methyl-2-aminopyridine (ampy) gave only molecular compound [Cd2Eu(bzo)(7)(ampy)(2)(EtOH)(H2O)] (Cd : L = 1 : 3). The structures of all the resulting compounds were studied by single crystal X-ray diffraction analysis. Photoluminescent properties were studied for solid samples of the synthesized compounds. The effect of the N-donor ligand geometry and the Eu center dot center dot center dot Eu distance on the lifetime of the Eu3+ atom’s D-5(0) excited state is discussed.

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Related Products of 22047-25-2, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 22047-25-2, Name is Acetylpyrazine, SMILES is C1=C(N=CC=N1)C(=O)C, belongs to Pyrazines compound. In a article, author is Liu, Junzhi, introduce new discover of the category.

Bottom-Up Synthesis of Nitrogen-Doped Polycyclic Aromatic Hydrocarbons

Bottom-up organic synthesis serves as an efficient method to provide atomically precise heteroatom-doped polycyclic aromatic hydrocarbons (PAHs) with not only well-defined size and edge structures but also specific concentrations and positions of the heteroatoms. We provide a plenary account of the preparation of nitrogen-doped PAHs (N-PAHs) through 1,3-dipolar cycloaddition between different dipolarophiles, as well as pyrazine-type N-doped diaza-hexa-peri-hexabenzocoronene (diaza-HBC). Additionally, we present the synthesis of a class of helical N-charged PAHs, including one charged aza[5]helicene and two charged aza[4]helicenes. Moreover, the bottom-up organic synthesis strategy is further extended to the construction of novel nitrogen-boron-nitrogen (NBN)-containing PAHs. Finally, we discuss the synthesis of four-coordinate boron chromophores containing 6,12,18-tris(alkyl amine)-5,11,17-triazatrinaphthylene derivative ligands. 1 Introduction 2 Nitrogen-Doped PAHs Based on Dibenzo-9a-azaphenalene (DBAP) 3 Cationic Nitrogen-Doped Helical PAHs 4 Nitrogen-Boron-Nitrogen-Doped PAHs 5 Conclusion and Outlook

Related Products of 22047-25-2, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 22047-25-2 is helpful to your research.