Gotowe bibliografie tematyczne / Enantiomeric purification

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Gotowa bibliografia na temat „Enantiomeric purification”

Autor: Grafiati

Data publikacji: 25 stycznia 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Enantiomeric purification"

Choi, Hwa-Jin, and Dong-Yeun Koh. "Homochiral Metal-Organic Framework Based Mixed Matrix Membrane for Chiral Resolution." Membranes 12, no. 4 (2022): 357. http://dx.doi.org/10.3390/membranes12040357.

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Efficient separation of enantiomers is critical in the chemical, pharmaceutical, and food industries. However, conventional separation methods, such as chromatography, crystallization, and enzymatic kinetic resolution, require high energy costs and specific reaction conditions for the efficient purification of one enantiomer. In contrast, membrane-based processes are continuous processes performed with less energy than conventional separation processes. Enantioselective polymer membranes have been developed for the chiral resolution of pharmaceuticals; however, it is difficult to generate suff

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Xu, Hong Yu, Zhao Jie Cui, and Jing Liu. "Enantioselective Trace Analysis of Polychlorinated Biphenyl Enantiomers in Soils by GC-ECD/MS." Advanced Materials Research 183-185 (January 2011): 1928–32. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1928.

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A simple method for qualitative and quantitative determination of PCB95, 132, 149 and 174 enantiomers in soils and sediments using GC-ECD/MS was proposed. On the promise of good purification efficiency, high recovery and easy operability, H2SO4 washing and a multi-layer column filled with 1 g anhydrous sodium sulfate, 2 g 10% silver nitrate-impregnated silica gel, 4 g 3.3% water-deactivated silica gel and 1.5 g anhydrous sodium sulfate were selected as purification procedures. The chromatographic conditions were optimized to obtain the best enantiomeric separation. Complete baseline separation

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Vieira, Lucas C. C., Bianca T. Matsuo, Lorena S. R. Martelli, Mayara Gall, Marcio W. Paixão та Arlene G. Corrêa. "Asymmetric synthesis of new γ-butenolides via organocatalyzed epoxidation of chalcones". Organic & Biomolecular Chemistry 15, № 29 (2017): 6098–103. http://dx.doi.org/10.1039/c7ob00165g.

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Wzorek, Alicja, Magdalena Kwiatkowska, Mariusz Urbaniak, and Barbara Gawdzik. "PROCES SAMO-DYSPROPORCJONOWANIA ENANCJOMERÓW PODCZAS CHROMATOGRAFII KOLUMNOWEJ." Wiadomości Chemiczne 77, no. 5 (2023): 425–48. https://doi.org/10.53584/wiadchem.2023.05.2.

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The review is devoted to self-disproportionation of enantiomers (SDE) phenomenon which has been observed for many different classes of chiral organic compounds. The SDE phenomenon occurs when the fractionation of an enantioenriched sample due the application of a physicochemical process under achiral conditions results in the variation of the proportion of the enantiomers present across the fractions, though the overall composition in terms of the sample ee remains unchanged. The SDE process can be considered in terms of separating the excess enantiomer from the racemate. The basic terminology

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Bosits, Miklós Hunor, Emese Pálovics, János Madarász, and Elemér Fogassy. "New Discoveries in Enantiomeric Separation of Racemic Tofisopam." Journal of Chemistry 2019 (April 7, 2019): 1–10. http://dx.doi.org/10.1155/2019/4980792.

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Resolution process of tofisopam has been re-evaluated now based on our new investigations. Originally, it was carried out in the water-chloroform system, where the intermediate salt of high diastereomeric excess was described as (R)-TOF·(R,R)-DBTA·(H2O)3. Opposed to previous assumptions, we have actually found that a different solvate composition, (R)-TOF‐(R,R)-DBTA-CHCl3, forms with chloroform, in which molecules of CHCl3 are captured and held with different strengths. Moreover, resolution of TOF with (R,R)-DBTA is possible (and favourable) in water-free solvent and solvent mixture. However,

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Zheng, Ming. "(Invited) Purification of Enantiomeric Pairs of DNA-Wrapped Carbon Nanotubes and Their Use in Bilateral Chiral Sensing." ECS Meeting Abstracts MA2024-01, no. 8 (2024): 833. http://dx.doi.org/10.1149/ma2024-018833mtgabs.

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This presentation will focus on our recent progress in purifying enantiomeric pairs of DNA-wrapped carbon nanotubes (DNA-CNTs) via the aqueous two-phase extraction method. We will also discuss a potential application of enantiomeric pairs of DNA-CNTs in bilateral chiral sensing.

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Varga and Bagi. "Preparation of Enantiomerically Enriched P-Stereogenic Dialkyl-Arylphosphine Oxides via Coordination Mediated Optical Resolution." Symmetry 12, no. 2 (2020): 215. http://dx.doi.org/10.3390/sym12020215.

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Optical resolution of several dialkyl-arylphosphine oxides was elaborated using the Ca2+ salt of (−)-O,O’-dibenzoyl-(2R,3R)-tartaric acid as the resolving agent. The conditions of crystallization and purification of the enantiomerically enriched phosphine oxides were optimized. Ethyl-phenyl-propylphosphine oxide and butyl-methyl-phenylphosphine oxide were prepared with an enantiomeric excess higher than 93%, whereas, three other dialkyl-arylphosphine oxides were obtained with an enantiomeric excess of 37–85%. It was also found that the sterically demanding alkyl chains hinder the formation of

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Frishman, Einat, Moshe Shapiro, David Gerbasi, and Paul Brumer. "Enantiomeric purification of nonpolarized racemic mixtures using coherent light." Journal of Chemical Physics 119, no. 14 (2003): 7237–46. http://dx.doi.org/10.1063/1.1603732.

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Meyer, Elazar. "Optimization of Process for Enzymatic Resolution of Racemic Amines using Continuous Flow Bioreactor." Technium: Romanian Journal of Applied Sciences and Technology 20 (March 22, 2024): 56–79. http://dx.doi.org/10.47577/technium.v20i.10794.

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The optimization of enzymatic process for the resolution of chemically and pharmaceutically important racemic amines is described using a continuous flow bioreactor. Also described are the isolation and purification methods of the reaction products and the various parameters affecting the optimal reaction conditions for the enzymatic resolution to afford the products in high chemical purity and enantiomeric excess (ee) of over 90%.

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Gerbasi, David, Paul Brumer, Ioannis Thanopulos, Petr Král, and Moshe Shapiro. "Theory of the two step enantiomeric purification of 1,3 dimethylallene." Journal of Chemical Physics 120, no. 24 (2004): 11557–63. http://dx.doi.org/10.1063/1.1753552.

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Rozprawy doktorskie na temat "Enantiomeric purification"

Pinètre, Clément. "Achieving Enantiοpurity Τhrοugh Directed Evοlutiοn and Crystallizatiοn under Νοn-Equilibrium Cοnditiοns". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR076.

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La cristallisation est beaucoup utilisée pour isoler des molécules d’intérêt pharmaceutique sous formes énantiopures, ce qui nécessite que les énantiomère s’auto-discriminent à l’état solide. Malheureusement, ce comportement est imprévisible et rare (5-10%), car les deux énantiomères cristallisent majoritairement sous forme de composé racémique, empêchant toute résolution chirale par cristallisation. Réalisant que des conditions hors équilibres peuvent surmonter ces statistiques défavorables, nous avons exploré les comportements à l’état solide et les propriétés thermodynamiques de différentes

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Huang, Pin Hao, and 黃品豪. "Purification of enantiomers with phase diagram forming conglomerates by stripping crystallization." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/57924730559026216152.

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碩士<br>長庚大學<br>化工與材料工程學系<br>100<br>Stripping crystallization (SC) is introduced in this work for the purification of 3-phenyllactic acid and hydrobenzoin, both of which belong to the phase diagram forming conglomerates. In principle, SC is operated at a series of the three-phase equilibrium conditions, in which the liquid mixture is simultaneously vaporized and crystallized. Thus, SC combines distillation and crystallization to produce pure crystals. A thermodynamic model is developed to simulate the three-phase equilibrium during the SC operation and to direct the batch SC experiments. The exp

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