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Showing 1 to 10 of 10 for “"Quinoxalines"”.
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ΣΥΝΘΕΣΗ ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΚΑΙ ΚΒΑΝΤΟΧΗΜΙΚΗ ΜΕΛΕΤΗ ΣΥΜΠΥΚΝΩΜΕΝΩΝ (Β) ΚΙΝΟΞΑΛΙΝΙΚΩΝ ΣΥΣΤΗΜΑΤΩΝ ΚΑΙ ΠΑΡΑΓΩΓΩΝ ΤΟΥΣ
… OF 1,4-DIOXIDES ANDSYNTHESIS OF PYRAZINO [2,3-B] QUINOXALINES. ELECTRON SPECTROSCOPY OF CORRELATION OF SPECTROCHEMICAL DATA WITH THE RESULTS OF QUANTUM CALCULATIONS (CNDO/2-CI METHOD). INFRARED SPECTROSCOPY. NUCLEAR MAGNETIC RESONANCE (1H AND 13C-NNIR) INCONNECTION WITH A CALCULATED ELECTRONIC …
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Some aspects of free radical polymerisation in UV-curing
Various quinoxalines,in association with N-methyld-iethanolamine as synergist, were used to initiate the polymerisation of acrylates. It was found that the quinoxalines where used with amine synergist are efficient Type II initiators. It was also found that the cure of the acrylate is faster when …
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Computational and adsorption investigation of some quinoxaline derivatives on selected metals in acidic media
… increase in the concentrations of the studied quinoxalines and decreased with the increase in temperature of the corrosive environment, whereas for zinc the inhibition efficiency increased with the increase in the temperature of the corrosive environment for all the quinoxaline compounds. The …
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Bildung und Nutzung multinuklearer Titanocenkomplexe mit N-heterocyclischen Brückenliganden
… were described from different points of view. Quinoxalines and quinolines have been shown to undergo dehydrogenative C-C coupling reactions to produce titanocene complexes of biquinoline and hexaazatrinaphthylene (HATN) derivatives. Trinuclear assemblies of titanocenecomlexes of C3-symmetric …
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Electrochemisty, Spectroelectrochemistry And/Or Electrosynthesis of Pi-Extended Porphyrins in Nonaqueous Media
… containing one to four beta, beta'-fused quinoxalines were characterized in nonaqueous solvents. Mutiple Au(III)/Au(II) centered reductions were observed in acidic media, with the exact number depending on the number of fused quinoxaline groups on the compounds. Electrochemical and …
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The synthesis and properties of 4-substituted pyrrolidine-2,3-Diones
… with o-phenylenediamine with which may form quinoxalines. A 4-carbethoxypyrrolidine -2,-3-dione will react with o-phenylenediamine win two ways forming wither a quinoxaline type structure or a diazacycloheptadiene ring. Structures are assigned to these compounds on analytical and spectral …
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The development and synthetic applications of Ti- and Pd-catalyzed processes
… for the highly selective asymmetric reduction of quinoxalines and quinazolines was developed. This complements technologies developed by others for the asymmetric reduction of other aromatic heterocycles. This chemistry utilizes a Ti catalyst based on the C2-symmetricansa-metallocene scaffold. In …
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Developments in Nickel-catalyzed Transfer Hydrocyanation Reactions and Novel Skeletal Editing Strategies through Nitrogen Atom Insertion
… transformation of indoles into quinazolines or quinoxalines, as well as pyrroles into pyrimidines, indenes into isoquinolines, or cyclopentadienes into pyridines (see Scheme II). The initial reaction design was based on the mechanistic proposal for the previously established Ciamician-Dennstedt …
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Studio dell’attività antivirale e/o anti-infiammatoria di nuove molecole di sintesi e/o di farmaci noti
… (Part II). Part I - Antiviral activity of quinoxalines derivates as new leads against Picornavirus Aim: New quinoxaline derivatives were synthesized and tested for cytotoxicity and antiviral activity against human coxsackie virus B5 [CVB-5] and polio virus type-1 [Sb-1], focusing on the …
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Chemistry of highly reactive group 5 and 6 transition metal compounds
Trimethylphosphine complexes of tungsten and molybdenum have been used to model the coordination chemistry and reactivity that may be observed on the surface of an industrial hydrotreating catalyst. Most notably, it was observed that W(PMe₃)₄(η²-CH₂PMe₂))H is capable of (i) the unprecedented …