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Showing 1 to 20 of 36 for “"morpholine"”.
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Flexible access to an array of optically-enriched conformationally-locked bicyclic morpholines and approaching bridged bicyclic piperazines
… in exploring the bioactivity of bridged morpholines, as well as bridged piperazines. Despite the interest in these types of compounds, there is a lack of routes into these scaffolds which allow for diversification surrounding the core scaffold. Consequently, the focus of this study was to …
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ΣΥΝΘΕΣΗ ΚΑΙ ΦΑΡΜΑΚΟΧΗΜΙΚΗ ΜΕΛΕΤΗ ΜΕΡΙΚΩΝ ΥΠΟΚΑΤΕΣΤΗΜΕΝΩΝ ΜΟΡΦΟΛΙΝΩΝ ΜΕ ΒΙΟΛΟΓΙΚΟ ΕΝΔΙΑΦΕΡΟΝ
A NUMBER OF NEW MORPHOLINE DERIVATIVES ARE SYNTHESIZED AND THE IMPORTANCE OF VARIOUS EFFECTS (E.G. INDUCTIVE, MESOMERIC, STEREOCHEMICAL) IS STUDIED. IONIZATION CONSTANTS (PKA'S) AND PARTITION COEFFICIENTS (N-OCTANOL-WATER OF THE SYNTHESIZED MORPHOLINES ARE DETERMINED EXPERIMENTALLY. THE RESULTS ARE …
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Studies in Asymmetric Catalysis: Lewis Base catalyzed/Lewis Acid Mediated Aldol Reactions of Ketone- and Amide Derived Nucleophiles
… patterns on the dienyl unit. Both ketone- and morpholine amide-derived dienol ethers afforded excellent enantio- and diastereoselectivity in the addition to conjugated aldehydes. Although ketone-derived dienolate did not react with aliphatic aldehydes, amide-derived dienolates were found to …
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Effect of Amines as Corrosion Inhibitors for a Low Carbon Steel in Power Industry
Commonly used amines in power industry, including morpholine, DBU (1,8-diazabicyclo[5.4.0]undec-7-ene), and DMA (dimethylallylamine) were evaluated for their effect on AISI 1018 steel at 250oF. Samples were exposed to an autoclave containing amine added aqueous solution at pH of 9.5 for 1, 2, 4, 6, …
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Peroxynitrite-mediated oxidations: nitration and nitrosation
… nitrite and (III) nitrous acid. The oxidation of morpholine by peroxynitrite in the presence and absence of added carbonate gives N-nitromorpholine and N-nitrosomorpholine. Nitration and nitrosation of morpholine are catalyzed by low levels of CO<sub>2</sub>; however, excess CO<sub>2</sub> …
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Polyoxometalate self-assembly : from molecules to framework materials
… N,N’-bis(2-hydroxyethyl)piperazine (bhep) and morpholine (morph) play in the polyanion self-assembly process, with the successful isolation of molecular species, chains, layers and three dimensional frameworks. Each of the ligands were used in two different sets of synthetic investigation to …
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Formation and Quantification of Corrosion Deposits in the Power Industry
… of dimethylamine (DMA), hydrazine and morpholine to control the water chemistry. Along with the abovementioned amines, this study also focuses on corrosion inhibition mechanismsof a new amine DBU (1, 8-diazabicyclo [5.4.0] undec-7-ene). Electrochemical impedance spectroscopy and …
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Separation by enclathration
… bromobenzene, iodobenzene, dioxane, morpholine, piperazine and pyridine. It was used in the two-component separation of dioxane and morpholine, in the two- and three-component separation of the isomers of picoline as well as in the two-, three- and four-component separation of toluene …
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The chemistry of some basic triphenylmethane dyes
… implications of the unusual values of aC for the morpholine dye have been considered. Morpholine Green has been found to undergo an extremely rapid hydrolysis and this necessitated a modification of the usual technique used in the kinetic experiments. The kinetic data for this dye, relative to …
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Emulsion-Templated Porous Polymers as Support Materials for Covalent Enzyme Immobilization
… with tris(2-aminoethyl)amine, morpholine and O,O’-bis(3-aminopropyl)polyethylene glycol. The functionalization of these GMA-based materials was observed via a number of analysis techniques, such as FT-IR spectroscopy, XPS spectroscopy, elemental analysis, Fmoc number …
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Inclusion compounds : structure, reactivity and selectivity
… selected solvents including 1,4-dioxane, DMSO, morpholine, THF and acetone, preferably in channel type inclusion modes. In the latter two classes of inclusion compounds the inclusion is facilitated by the formation of hydrogen bonds from the host hydroxyl moieties to the guests.
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A new strategy for selecting and evaluating physical solvents for gas absorption
… solvents are acetonyl acetone (B2) and n-formyl morpholine which have been suggested previously as potential credible alternatives to the current ones. The important characteristics of: acetonyl acetone are its high solubility and its low viscosity, while the n-formyl morpholine is characterised …
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Synthesis, Vinylation and Rearrangement of NH-Isoxazolines and Copper Catalyzed 6 Pi Electrocyclization
… copper catalyzed 6 π electrocyclization to form morpholines and morpholine–N–oxides via an initial Chan–Lam coupling followed by spontaneous electrocyclization.
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Synthetic and spectroscopic studies of 6-substituted chromone derivatives
… l-[(6-bromochromo- 2-yl)-carbonyl]-morpholine were also synthesized. The Suzuki cross-coupling reaction was also utilized, inserting a benzene ring in the chromone moiety of several chromone-2-carboxamides. The compounds synthesized were purified either by flash chromatography or …
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Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics
… 1,3-oxazinan-2-ones, 2-oxazolines, oxazines, morpholine and morpholinones. Because of their interesting properties, chiral heterocycles have stirred great interest in the synthetic chemist community to develop useful and efficient strategies to these molecules. In this dissertation, the design …
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DESIGN AND SYNTHESIS OF PURINE BASED NEUROPROTECTORS AND NOVEL SYNTHETIC METHODS FOR THE TRIFLUOROMETHYLATION OF ALDEHYDE HYDRAZONES
… to a series of aromatic aldehyde N-amino morpholine hydrazones to give the corresponding C(sp<sup>2</sup>)- trifluoromethyl hydrazones in moderate to high yields. Cu (II)-catalysis provides a cost-effective synthetic approach while Rose Bengal mediated photo redox catalyzed method provides …
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Activated carbon catalyzed nitrosamine formation via amine nitrosation
… 0.11% of the spiked secondary amine at pH 7.5. Morpholine and dibutylamine, larger and bulkier secondary amines, formed their corresponding nitrosamines at higher yields than DMA (0.21% and 1.69%, respectively). Additionally, select tertiary amines were shown to be capable of undergoing …
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Mechanistic studies on palladium-catalyzed carbon-nitrogen bond forming reactions
… coupling of 4-t-butylbromobenzene and morpholine using the ligand Xantphos at varying palladium to ligand ratios. It was found that catalyst activity is dramatically dependent on the concentration of ligand relative to palladium, due to formation of Pd(Xantphos)₂. Two plausible …
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Application of impedance spectroscopy to the study of dithiocarbamate species on Au surfaces: Effects of aqueous Cu²⁺ and Mg²⁺ ions
… surface by the dithiocarbamate group included morpholine or 5-amino-1,10-phenanthroline. A sensitive determination of the amount of Cu<sup>2+</sup> leaching from anti-fouling marine hull coatings into water would be a useful example of practical applications of impedance-based sensors for heavy …
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Synthesis of sulfonylthioureas as anti-diabetic drugs
… of 10 μM, 50 μM, 100 μM and 200 μM. 4-(2-Morpholine-acetamido)-benzenesulfonamide 25-e showed the most promising α-glucosidase inhibition with 95% inhibition at concentration of 50 μM and 98 % inhibition at concentration of 100 μM. Compounds 28-c, 26-b, 26-c and 26-d showed significant …
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