Tag: M.W:100-200

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.Recommanded Product: 1452-77-3.Jadresko, Dijana; Markovic, Berislav; Medvidovic-Kosanovic, Martina; Matkovic-Calogovic, Dubravka; Szechenyi, Aleksandar; Pockaj, Marta; Balic, Tomislav; Popovic, Zora published the article 《Structural and electrochemical properties of two novel CdX2 (X = Br, I) picolinamide complexes》 about this compound( cas:1452-77-3 ) in Polyhedron. Keywords: cadmium bromine iodine picolinamide complex preparation thermal stability electrochem; crystal structure cadmium bromine iodine picolinamide complex. Let’s learn more about this compound (cas:1452-77-3).

Two novel discrete cadmium(II) complexes, namely [CdBr2(pia)2] (1) and [CdI2(pia)2] (2) were prepared by reactions of aqueous solutions of CdX2 (X = Br, I) salts with picolinamide (pia) in the 2:1 ligand to metal stoichiometric ratio. Both compounds were characterized by elemental anal., IR-spectroscopy, TG/DSC analyses and electrochem. methods. The electrochem. characteristics of both ligand (pia) and prepared complexes were studied by cyclic and (cyclic) square-wave voltammetry, on a static mercury drop electrode (SMDE), in aqueous media over a wide pH range. The mol. and crystal structure of the compounds was determined by the single crystal X-ray diffraction method. X-ray structure anal. of 1 and 2 have shown that the compounds are isostructural with minor differences in the bond angles of the coordination sphere. In both compounds the Cd(II) ion is coordinated by two halide atoms and two mutually orthogonal picolinamide ligands that act as N,O-chelators in a distorted octahedral arrangement. In the crystal structure, the mols. of 1 and 2 are primarily linked via strong head-to-head amide hydrogen bond interactions forming dimers. In 1 the adjacent dimers are connected via N-H···Br hydrogen bonds and offset face to face π···π interactions that involve pyridine rings, while in the structure of 2, the dimers are connected via C-H···O, C-H···N and N-H···I hydrogen bonds into the final 3D structure. The intermol. interactions in both crystal structures were further studied by Hirshfeld surface anal. Electrochem. anal. of 2-picolinamide indicates the irreversible nature of its electro-reduction reaction on SMDE at pH 2. To provide better insight into the redox mechanism and electrokinetic properties of 2-picolinamide, the study of the effect of signal frequency on CSWV response was carried out, too. The electrochem. reduction of complex 2 involves two electron transfer reactions at -0.55 V and -0.83 V, indicating two redox active centers in the mol., while complex 1 appears to be apparently electro-inactive in the studied potential range.

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

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 Aerobic Activation of C-H Bond in Amines Over a Nanorod Manganese Oxide Catalyst. Author is Wang, Hai; Wang, Liang; Wang, Sai; Dong, Xue; Zhang, Jian; Xiao, Feng-Shou.

The development of heterogeneous catalysts for the synthesis of pharmaceutically relevant compounds is always important for chem. research. Here, we report a selective aerobic oxidation of aromatic and aliphatic amines to corresponding amides over a nanorod manganese oxide (NR-MnOx) catalyst. The kinetic studies reveal that the NR-MnOx catalyzed amine-to-amide reaction proceeds the oxidative dehydrogenation of the amines into nitriles, followed by hydrolysis of nitrile into amides. The NR-MnOx exhibits fast kinetics and high selectivities in these steps, as well as hinders the byproduct formation. More importantly, the NR-MnOx catalyst is stable and reusable in the continuous recycle tests with water as a sole byproduct, exhibiting superior sustainability and significant advancement to outperform the traditional amide production route in acidic or basic media with toxic byproducts.

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Reference:
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.Category: tetrahydroisoquinoline.Chen, Chao-Cheng; Chen, Yang-Yi; Lo, Yi-Hsuan; Lin, Ming-Hsien; Chang, Chih-Hsien; Chen, Chuan-Lin; Wang, Hsin-Ell; Wu, Chun-Yi published the article 《Evaluation of radioiodinated fluoronicotinamide/fluoropicolinamide-benzamide derivatives as theranostic agents for melanoma》 about this compound( cas:1452-77-3 ) in International Journal of Molecular Sciences. Keywords: melanoma theranostic agent radioiodinated fluoronicotinamide fluoropicolinamide benzamide; 131I-iodofluoronicotiamide benzamide (131I-IFNABZA); 131I-iodofluoropicolinamide benzamide (131I-IFPABZA); melanoma; theranostic agent. Let’s learn more about this compound (cas:1452-77-3).

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Picolinamide(SMILESS: O=C(N)C1=NC=CC=C1,cas:1452-77-3) is researched.Category: tetrahydroisoquinoline. The article 《Ethene-1,1,2,2-tetracarbonitrile and Methanol in the Methylating Reaction of Tertiary Amines to the Quaternary Ammonium Compounds of 1,1-Dicyano-2-methoxy-2-oxoethane-1-ide》 in relation to this compound, is published in Synlett. Let’s take a look at the latest research on this compound (cas:1452-77-3).

We discovered a new method to methylate tertiary amines such as urotropine, triethylamine, pyridine, 2-methylpyridine, 4-acetylpyridine, and isonicotinamide, to quaternary ammonium compounds, with 1,1-dicyano-2-methoxy-2-oxoethane-1-ide being the counterion. Methyl-1,3,5,7-tetraazaadamantan-1-ium 1,1-dicyano-2-methoxy-2-oxoethane-1-ide, N,N-diethyl-N-methylethanaminium 1,1-dicyano-2-methoxy-2-oxoethane-1-ide, and substituted-methylpyridinium 1,1-dicyano-2-methoxy-2-oxoethane-1-ides were synthesized. Quaternary ammonium compounds of 1,1-dicyano-2-methoxy-2-oxothane-1-ide were synthesized within a single stage by stirring methanol solutions of tertiary amines with ethene-1,1,2,2-tetracarbonitrile (ETCN) at room temperature In the reaction of ETCN with tertiary amines in methanol, processes occur that form the 1,1-dicyano-2-methoxy-2-oxoethane-1-ide fragment with simultaneous N-methylation. Crystal structures based on X-ray diffraction anal. of the obtained compounds were studied.

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

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.Evora, Antonio O. L.; Castro, Ricardo A. E.; Maria, Teresa M. R.; Ramos Silva, M.; Canotilho, Joao; Eusebio, M. Ermelinda S. researched the compound: Picolinamide( cas:1452-77-3 ).Computed Properties of C6H6N2O.They published the article 《Lamotrigine: Design and synthesis of new multicomponent solid forms》 about this compound( cas:1452-77-3 ) in European Journal of Pharmaceutical Sciences. Keywords: lamotrigine multicomponent solid forms; Co-crystals and salts; Diflunisal; Lamotrigine; Pyridinecarboxamides; Stability assay; Xanthines. We’ll tell you more about this compound (cas:1452-77-3).

In this work, a crystal engineering and thermodn. based approach has been used aiming at contributing to a deeper knowledge of lamotrigine multicomponent solid forms. Two types of co-mols. have been chosen that can give rise to co-crystals with lamotrigine through different supramol. heterosynthons: the xanthines, theophylline and caffeine, and the three isomeric pyridinecarboxamides. Association with diflunisal, which may result in a salt, was also investigated. Mechanochem., differential scanning calorimetry, thermogravimetry, X-ray powder and single crystal diffraction, IR spectroscopy were the methods used. For all the systems, exploratory neat mechanochem. experiments, carried out on lamotrigine + co-mol. binary mixtures of different compositions, were not successful in promoting association From differential scanning calorimetry data and the binary solid-liquid phase diagrams, co-crystals/salts were identified as well as their resp. stoichiometry, and a methodol. of synthesis was established. For pyridinecarboxamides, mol. recognition is dependent on the position of the amide group in the pyridine ring: co-crystallization did not occur with picolinamide co-former. Both xanthines form co-crystals with lamotrigine, (1:1) with theophylline and (2:1) lamotrigine:caffeine. Addnl., the crystalline structure of a lamotrigine:theophylline 1:1 monohydrate was solved. The (1:1) lamotrigine:theophylline co-crystal converts to this monohydrate in accelerated stability tests. A (1:1) lamotrigine:diflunisal salt was identified, which proved to be stable in accelerated stability assays.

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

Civati, Francesco; Svoboda, Vaclav; Urwin, Stephanie Jane; McArdle, Patrick; Erxleben, Andrea; Croker, D.; ter Horst, Joop published an article about the compound: Picolinamide( cas:1452-77-3,SMILESS:O=C(N)C1=NC=CC=C1 ).Quality Control of Picolinamide. 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.

A cooling crystallization of HOBz and isonicotinamide in EtOH yields the 1:1 cocrystal with an extreme needle-like morphol. with an initial mean aspect ratio of ~10 and a size of ~64μm. The use of suspension temperature cycling in combination with tailor-made additives alleviates such extreme needle-like morphols. and increases the average particle size of this cocrystal material. Temperature cycling of the cocrystal suspensions in EtOH alone reduces the mean aspect ratio from 10 to 3.3 while it increases the average crystal size from 64 to 450μm. The further addition of low concentrations of benzamide or nicotinamide suppresses the growth rate at the tip of the needle even more, resulting in a more favorable equant morphol. An iterative mechanism in which additives are incorporated in the lattice structure and released during the temperature increase in each cycle is proposed. Thus, the incorporation of an additive at the normally fast growing and potential needle tips and its release during the temperature increase part of the cycle effectively makes an additive action catalytic. The simultaneous use of temperature cycling and tailor-made additives offers a new and effective approach for the elimination of unsatisfactory needle-like crystal morphologies and a small crystal size during the production of a pharmaceutical cocrystal material. The simultaneous use of temperature cycling and tailor-made additives offers a new and effective approach for morphol. control of a pharmaceutical cocrystal.

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

Guerriero, Antonella; Peruzzini, Maurizio; Gonsalvi, Luca published the article 《Synthesis of New Ruthenium-CAP Complexes and Use as Catalysts for Benzonitrile Hydration to Benzamide》. Keywords: ruthenium triazaphosphatricyclotridecane complex preparation hydration catalyst.They researched the compound: Picolinamide( cas:1452-77-3 ).Synthetic Route of C6H6N2O. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1452-77-3) here.

The new bimetallic [Ru2(μ-Cl)3(CAP)6]Cl (1) and monometallic cis,cis,trans-[RuCl2(dmso-S)2(CAP)2] (2) complexes, bearing the water soluble cage-like phosphine CAP (1,4,7-triaza-9-phosphatricyclo[5.3.2.1]tridecane), were synthesized and characterized in solution by NMR spectroscopy and ESI-MS spectrometry. The complexes, endowed with high solubility and stability in water, were applied as catalysts for the proof-of-concept hydration of benzonitrile to benzamide in neat water at 100°C, achieving high conversions with only 1 mol % of catalyst, both in single runs and in catalyst recycling experiments

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

Product Details of 1452-77-3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Synergistic Photocatalytic-Adsorption Removal of Basic Magenta Effect of AgZnO/Polyoxometalates Nanocomposites. Author is Tian, Heyun; Luo, Jie; Zhang, Ke; Ma, Chenguang; Qi, Yiyi; Zhan, Shixia; Liu, Xiao; Li, Mingxue; Liu, Hongling.

The bifunctional photocatalytic-adsorbent AgZnO/polyoxometalates (AgZnO/POMs) nanocomposites were synthesized by combining AgZnO hybrid nanoparticles and polyoxometalates [Cu(L)2(H2O)]H2[Cu(L)2(P2Mo5O23)]·4H2O (HL = C6H6N2O) into nanostructures via a sonochem. method. Transmission electron microscopy (TEM) indicated that AgZnO/POMs nanocomposites were uniform with narrow particle size distribution and without agglomeration. X-ray powder diffraction (XRD) and XPS anal. confirmed the nanostructure and composition of AgZnO/POMs nanocomposites. The UV-visible spectra (UV-Vis) and photoluminescence spectra (PL) confirmed excellent optical properties of the AgZnO/POMs nanocomposites. 94.13% ± 0.61 of basic magenta (BM) in aqueous solution could be removed using the AgZnO/POMs nanocomposites through adsorption and photocatalysis. The kinetic anal. showed that both the adsorption and photocatalysis process conform to pseudo-second-order kinetics. In addition, the removal rate of AgZnO/POMs nanocomposites was found to be almost unchanged after 5 cycles of use. The bifunctional photocatalytic-adsorbent AgZnO/POMs nanocomposites with high stability and cycling performance have broad application prospects in the treatment of refractory organic dye wastewater containing triphenylmethane.

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

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 Phase Transfer Ceria-Supported Nanocatalyst for Nitrile Hydration Reaction, the main research direction is ceria supported rare earth metal oxide preparation characterization; nitrile hydration reaction phase transfer catalyst.Formula: C6H6N2O.

The present study elaborates the catalytic effect of rare-earth metal oxides (Sm2O3 and La2O3) over ceria as a support phase transfer catalyst. The synthesized catalysts have been subjected to different characterization techniques, such as field-emission SEM, high-resolution transmission electron microscopy, powder X-ray diffraction, N2 adsorption-desorption (BET surface anal.), temperature-programmed desorption study (NH3/CO2-TPD), Fourier transform IR, Raman anal., and XPS to get better insights into the catalytic activity of the catalysts for hydration of nitrile.

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

Computed Properties of C6H6N2O. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Ionic liquid catalysed aerobic oxidative amidation and thioamidation of benzylic amines under neat conditions. Author is Joshi, Abhisek; Kumar, Rahul; Semwal, Rashmi; Rawat, Deepa; Adimurthy, Subbarayappa.

Tetrabutylammonium hydroxide (TBAOH) was discovered as a highly efficient and green catalyst for aerobic oxidation of the α-methylene carbon of primary amines as well as benzylic groups RCH2NH2 (R = Ph, pyren-1-yl, thiophene-2-yl, etc.) into the corresponding amides RC(O)NH2 and ketones R1C(O)C6H5 [R1 = Ph, pyridin-2-yl, C6H5C(O)] and 9H-fluoren-9-one under neat conditions. Ionic liquid TBAOH catalyzed aerobic oxidation of benzyl amines to benzamides and with elemental sulfur was described; and the corresponding benzylbenzothioamides RC(S)NHCH2R were obtained under metal-free, oxidant-free and base-free conditions. Applicability at the gram scale for the synthesis of the desired amides/ketones is also demonstrated with the present protocol.

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