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2203 2209 Beauchamp RO, Jr., Bus JS, Popp JA, Boreiko CJ, Andjelkovich DA: A critical review of the literature on hydrogen sulfide toxicity. Crit. Rev. Toxicol. 13, 25–97 (1984

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Resolution and Discovery
Authors: Svetlana Jovanovic, Olaf C. Haenssler, Milica Budimir, Duška Kleut, Jovana Prekodravac, and Biljana Todorovic Markovic

functional groups. In this paper we generate a powerful reducing agent, nascent hydrogen (H* or H – atomic hydrogen) directly in the reaction mixture using kitchen Al foil and HCl. This approach is eco-friendly, short-time and low price procedure. Thus, the

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Introduction Palladium and platinum are of fundamental relevance in industrial catalysis [ 1 ]. They play a central role as heterogeneous catalysts in hydrogenation reactions. The addition of a second metal to palladium or

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A process comprising a continuous-flow hydrogenation reaction integrated with selective water-organic solvent biphasic extraction using CO2 as molecular switch to control partitioning was devised for the synthesis of arylpiperidines from arylpyridines. The selective hydrogenation of 4-phenylpyridine using heterogeneous carbon-supported metal catalysts was chosen as model reaction. A design-of-experiment approach was used for the identification of suitable reaction conditions under continuous-flow operation. A maximum selectivity for 4-phenylpiperidine of 96% was achieved at 87% conversion suppressing the deep hydrogenation to 4-cyclohexylpiperidine almost completely (≤5%). The higher basicity of piperidines over pyridines was exploited for selective and reversible protonation of the product upon pressurization with CO2 separating it quantitatively from the remaining starting material in a water—EtOAc biphasic system. This concept enabled a fully integrated and a salt-free synthetic process using a standard Pd/C catalyst for the hydrogenation coupled with the CO2-triggered isolation of the desired product 4-phenylpiperidine in 81% yield and 98% purity.

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metal loadings. Other work has demonstrated the high activity of carbon-black-supported Pd (promoted with Ru) for hydrogen peroxide electroreduction, which makes this system promising as a cathode catalyst for fuel cells using H 2 O 2 as oxidant [ 14

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active than TS-1 and Ti-Beta in the liquid-phase epoxidation of small, linear alkenes with hydrogen peroxide, but is also highly selective for the formation of epoxides [ 2 ]. In addition, this material also exhibits a unique feature of selective

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. Sterilization by pure oxygen plasma and by oxygen-hydrogen peroxide plasma: an efficacy study. Int J Pharm. 2008; 353: 170–175. 3 Klämpfl TG, Isbary G, Shimizu T, et al. Cold atmospheric

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dioxide is its hydrogenation into valuable compounds such as methanol, generally on copper based catalysts. The synthesis of methanol from CO/CO 2 /H 2 mixtures using CuO/ZnO/Al 2 O 3 catalysts is currently attracting much interest due to its economical

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hospital acquired enterococcal infections. Djoric et al. searched the genetic determinants of cephalosporin resistance in Enterococci faecalis and discovered that oxidative stress drives enhanced intrinsic resistance to antibiotics. Hydrogen peroxide

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Introduction Zeolites with titanium atoms in the structure have wide applications in oxidation processes (especially in epoxidation processes) which are carried out in the presence of hydrogen peroxide (oxidizing agent). To the

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