Category: 1452-77-3

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 1452-77-3, is researched, SMILESS is O=C(N)C1=NC=CC=C1, Molecular C6H6N2OJournal, Article, Research Support, Non-U.S. Gov’t, Journal of Inorganic Biochemistry called Characterization of copper(II) specific pyridine containing ligands: Potential metallophores for Alzheimer’s disease therapy, Author is Jakusch, Tamas; Hassoon, Azza A.; Kiss, Tamas, the main research direction is copper zinc pyridinylmethylpicolinamide pyridinylmethylpyridinylmethylamino complex formation ESR; Amyloid β; Copper; Electron Paramagnetic Resonance spectroscopy; Metallophore; Reactive oxygen species; Speciation.Recommanded Product: Picolinamide.

Two amide group containing pyridine derivatives, N-(pyridin-2-ylmethyl)picolinamide (PMPA) and N-(pyridin-2-ylmethyl)-2-((pyridin-2-ylmethyl)amino)acetamide (DPMGA), have been investigated as potential metallo-phores in the therapy of Alzheimer’s disease. Their complex formation with Cu(II) and Zn(II) were characterized in details. Unexpectedly not only the Cu(II) but also the Zn(II) was able to induce deprotonation of the amide-NH, however, it occurred only at higher pH or at higher metal ion concentrations than the biol. conditions. At μM concentration level mono complexes (MLH-1) dominate with both ligands. Direct fluorescence and reactive oxygen species (ROS) producing measurements prove that both ligands are able to remove Cu(II) from its amyloid-β complexes (CuAβ). Correlation was also established between the conditional stability constant of the Cu(II) complexes with different ligands and their ability of inhibition of ROS production by CuAβ.

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Recommanded Product: Picolinamide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Discovery of a Potent Picolinamide Antibacterial Active against Clostridioides difficile. Author is Speri, Enrico; Janardhanan, Jeshina; Masitas, Cesar; Schroeder, Valerie A.; Lastochkin, Elena; Wolter, William R.; Fisher, Jed F.; Mobashery, Shahriar; Chang, Mayland.

A major challenge for chemotherapy of bacterial infections is perturbation of the intestinal microbiota. Clostridioides difficile is a Gram-pos. bacterium of the gut that can thrive under this circumstance. Its production of dormant and antibiotic-impervious spores results in chronic disruption of normal gut flora and debilitating diarrhea and intestinal infection. C. difficile is responsible for 12,800 deaths per yr in the United States. Here, we report the discovery of 2-(4-(3-(trifluoromethoxy)phenoxy)picolinamido)benzo[d]oxazole-5-carboxylate as an antibacterial with potent and selective activity against C. difficile. Its MIC50 and MIC90 (the concentration required to inhibit the growth of 50% and 90% of all the tested strains, resp.) values, documented across 101 strains of C. difficile, are 0.12 and 0.25μg/mL, resp. The compound targets cell wall biosynthesis, as assessed by macromol. biosynthesis assays and by SEM. Animals infected with a LD of C. difficile and treated with compound 1 had a similar survival compared to treatment with vancomycin, which is the frontline antibiotic used for C. difficile infection.

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Tetrahydroisoquinoline – Wikipedia,
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Recommanded Product: Picolinamide. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Dehydration of primary amides to nitriles catalyzed by [CNC]-pincer hydrido cobalt(III) complexes. Author is Ren, Shishuai; Wang, Yangyang; Yang, Fei; Sun, Hongjian; Li, Xiaoyan.

The dehydration reactions from primary amides to nitriles were catalyzed by the [CNC]-pincer hydrido cobalt(III) complexes [(ortho-F4C6-CH=N-C10H6)Co(III)(H)(PMe3)2], [(2,5-F2C6H2-CH=N-C10H6)Co(III)(H)(PMe3)2] (I) and [(2,4,5-F3C6H-CH=N-C10H6)Co(III)(H)(PMe3)2] as catalysts with (EtO)3SiH as an efficient reducing agent. These hydrido cobalt(III) complexes as catalysts are suitable for many substrates and have good functional group tolerance. Among the three cobalt hydrides, complex I is the best catalyst. This is the first hydrido cobalt complex-catalyzed dehydration of primary amides to nitriles.

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Tetrahydroisoquinoline – Wikipedia,
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Lee, Cheng-Ting; Tsai, Chang-Che; Wu, Pei-Jhen; Yu, Bor-Yih; Lin, Shiang-Tai published an article about the compound: Picolinamide( cas:1452-77-3,SMILESS:O=C(N)C1=NC=CC=C1 ).Formula: C6H6N2O. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1452-77-3) through the article.

This work aims at evaluating potential direct CO2 conversion processes through systematic screening and process simulation. Fifteen direct routes converting CO2 to carbonates or carbamates, with in situ chem. dehydration using 2-cyanopyridine (2-CP) are focused. The work covers an extensive examination (and supplement) on the phys. properties, selection of promising routes, process simulation, optimization, environmental, and techno-economic evaluation. Firstly, three promising routes were selected, producing di-Me carbonate (DMC), di-Pr carbonate (DPC), and Iso-Pr N-phenylcarbamate (IPPhCM), based on three criteria: azeotropic search, product selectivity and reacting conditions. Next, the corresponding processes were simulated, optimized, heat-integrated, and systematically compared with the previously-proposed di-Et carbonate (DEC) process through environmental and economic anal. From environmental anal., the CO2 emission rate (CO2-e, in kg/kg-product) was 0.067, 0.088, -0.040 and -0.154 for producing DMC, DPC, IPPhCM and DEC, resp. By reducing the excess ratio used for reaction (i.e. 2-CP/alc. or amine/alc.), the CO2-e improved to -0.122, -0.086, and -0.117 for producing DMC, DPC and IPPhCM, resp. Finally, the min. required selling prices (MRSP) at 15% internal rate of return (IRR) were determined, with the unit price of 2-CP, 2-picolinamide (2-PA), and the reactor residence time regarded as uncertainties. The MRSPs for DMC, DPC, IPPhCM and DEC are found in the range of 1.50-4.96, 2.29-4.24, 2.07-4.06 and 1.12-2.81 (all in USD/kg), resp. Future studies exploring the com. availability and the regeneration of 2-CP, and the feasibility of reducing the excess ratio and the reaction residence time are considered helpful.

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Tetrahydroisoquinoline – Wikipedia,
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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 1452-77-3, is researched, Molecular C6H6N2O, about Evaluation of radioiodinated fluoronicotinamide/fluoropicolinamide-benzamide derivatives as theranostic agents for melanoma, the main research direction is melanoma theranostic agent radioiodinated fluoronicotinamide fluoropicolinamide benzamide; 131I-iodofluoronicotiamide benzamide (131I-IFNABZA); 131I-iodofluoropicolinamide benzamide (131I-IFPABZA); melanoma; theranostic agent.Application In Synthesis of Picolinamide.

Malignant melanoma is the most harmful type of skin cancer and its incidence has increased in this past decade. Early diagnosis and treatment are urgently desired. In this study, we conjugated picolinamide/nicotinamide with the pharmacophore of 131I-MIP-1145 to develop 131I-iodofluoropicolinamide benzamide (131I-IFPABZA) and 131I-iodofluoronicotiamide benzamide (131I-IFNABZA) with acceptable radiochem. yield (40 ± 5%) and high radiochem. purity (>98%). We also presented their biol. characteristics in melanoma-bearing mouse models. 131I-IFPABZA (Log P = 2.01) was more lipophilic than 131I-IFNABZA (Log P = 1.49). B16F10-bearing mice injected with 131I-IFNABZA exhibited higher tumor-to-muscle ratio (T/M) than those administered with 131I-IFPABZA in planar γ-imaging and biodistribution studies. However, the imaging of 131I-IFNABZA- and 131I-IFPABZA-injected mice only showed marginal tumor uptake in A375 amelanotic melanoma-bearing mice throughout the experiment period, indicating the high binding affinity of these two radiotracers to melanin. Comparing the radiation-absorbed dose of 131I-IFNABZA with the melanin-targeted agents reported in the literature, 131I-IFNABZA exerts lower doses to normal tissues on the basis of similar tumor dose. Based on the in vitro and in vivo studies, we clearly demonstrated the potential of using 131I-IFNABZA as a theranostic agent against melanoma.

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Tetrahydroisoquinoline – Wikipedia,
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Formula: C6H6N2O. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Synthesis, characterization and crystal structure of 2-pyridinecarboxamide.

The 2-pyridinecarboxamide was synthesized from 2-picoline through two-steps reaction. Initially, 2-picoline was converted into 2-cyanopyridine by ammoxidation in a stainless-steel fixed-bed reactor at 370°C with V2O5 loaded on TiO2 as catalyst. The 2-cyanopyridine was transformed into 2-pyridinecarboxamide through oxidation hydrolysis in basic solution using MnO2 as oxidant at 70°C. The crystal structure of 2-pyridinecarboxamide was investigated using X-ray diffraction and SHELX 2018/3 (sh) software and the result indicated that 2-pyridinecarboxamide crystallized in the monoclinic system, space group P21/n with a = 5.207(2), b = 7.097(3), c = 16.243(6) Å, V = 595.7 (4) Å3; Z = 4.

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Tetrahydroisoquinoline – Wikipedia,
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Product Details of 1452-77-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Synthesis of N-(6-[18F]Fluoropyridin-3-yl)glycine as a potential renal PET agent. Author is Wang, Hongliang; Dong, Weixuan; Zhao, Qinan; Lu, Keyi; Guo, Xiaoshan; Liu, Haiyan; Wu, Zhifang; Li, Sijin.

Given the requirements of high sensitivity and spatial resolution, the development of new positron emission tomog. (PET) agents is required for PET renog. The objective of this study was to investigate a new fluorine-18 labeled hippurate analog of picolinamide, N-(6-[18F]Fluoropyridin-3-yl)glycine, as a new renal PET agent for evaluating renal function. N-(6-[18F]Fluoropyridin-3-yl)glycine was prepared via a two-step reaction, including the nucleophilic substitution reaction of Br with 18F using Me 2-(6-bromonicotinamido)acetate as a precursor followed the hydrolysis with sodium hydroxide and purification by preparative-HPLC. The in vitro and in vivo stability were determined using HPLC, and the plasma protein binding (PPB) and erythrocyte uptake of N-(6-[18F]Fluoropyridin-3-yl)glycine were determined using blood collected from healthy rats at 5 min post-injection. Biodistribution and dynamic micro-PET/CT imaging studies were conducted in healthy rats. N-(6-[18F]Fluoropyridin-3-yl)glycine demonstrated good stability both in vitro and in vivo. The results of the biodistribution and dynamic micro-PET/CT imaging studies in normal rats indicated that N-(6-[18F]Fluoropyridin-3-yl)glycine was rapidly and exclusively excreted via the renal-urinary pathway. N-(6-[18F]Fluoropyridin-3-yl)glycine is has been shown to be a promising renal PET agent and warrants further evaluation of renal function.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Development of radiofluorinated nicotinamide/picolinamide derivatives as diagnostic probes for the detection of melanoma.Name: Picolinamide.

Regarding the increased incidence and high mortality rate of malignant melanoma, practical early-detection methods are essential to improve patients′ clin. outcomes. In this study, we successfully prepared novel picolinamide-benzamide (18F-FPABZA) and nicotinamide-benzamide (18F-FNABZA) conjugates and determined their biol. characteristics. The radiochem. yields of 18F-FPABZA and 18F-FNABZA were 26 ± 5% and 1 ± 0.5%, resp. 18F-FPABZA was more lipophilic (log P = 1.48) than 18F-FNABZA (log P = 0.68). The cellular uptake of 18F-FPABZA in melanotic B16F10 cells was relatively higher than that of 18F-FNABZA at 15 min post-incubation. However, both radiotracers did not retain in amelanotic A375 cells. The tumor-to-muscle ratios of 18F-FPABZA-injected B16F10 tumor-bearing mice increased from 7.6 ± 0.4 at 15 min post-injection (p.i.) to 27.5 ± 16.6 at 3 h p.i., while those administered with 18F-FNABZA did not show a similarly dramatic increase throughout the exptl. period. The results obtained from biodistribution studies were consistent with those derived from microPET imaging. This study demonstrated that 18F-FPABZA is a promising melanin-targeting positron emission tomog. (PET) probe for melanotic melanoma.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about New Pharmaceutical Cocrystal Forms of Flurbiprofen: Structural, Physicochemical, and Thermodynamic Characterization.Recommanded Product: Picolinamide.

In this work, three new cocrystals of the nonsteroidal anti-inflammatory drug flurbiprofen with salicylamide, benzamide, and picolinamide have been discovered using thermodn. anal. of solid-liquid binary phase diagrams, and their crystal structures have been determined from the high-resolution synchrotron powder diffraction data. Periodic d. functional theory calculations have been carried out to gain addnl. insight into energy differences between the cocrystal structures. The pH-solubility behavior and solubility advantage of the cocrystals have been examined via eutectic concentrations of the components, and the thermodn. stability relationships between different solid phases have been rationalized in terms of Gibbs energies of the formation reactions. In addition, a new model has been proposed for estimating the solubility product (Ksp) of a cocrystal, based on the exptl. intrinsic solubility of the drug and coformer complemented by calculated physicochem. HYBOT descriptors. The relationship between the change in Gibbs free energy and the mol. volume of cocrystal formation has been observed and discussed.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Picolinamide( cas:1452-77-3 ) is researched.Product Details of 1452-77-3.Guo, Beibei; de Vries, Johannes G.; Otten, Edwin published the article 《Hydration of nitriles using a metal-ligand cooperative ruthenium pincer catalyst》 about this compound( cas:1452-77-3 ) in Chemical Science. Keywords: nitrile water ruthenium pincer catalyst hydration; amide preparation. Let’s learn more about this compound (cas:1452-77-3).

The catalytic nitrile hydration using ruthenium catalysts based on a pincer scaffold with a dearomatized pyridine backbone. These complexes catalyzed the nucleophilic addition of H2O to a wide variety of aliphatic and (hetero)aromatic nitriles in tBuOH as solvent. Reactions occurred under mild conditions (room temperature) in the absence of additives. A mechanism for nitrile hydration was proposed that is initiated by metal-ligand cooperative binding of the nitrile.

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Tetrahydroisoquinoline – Wikipedia,
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