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Relevant bibliographies by topics / Separation of the diastereomers

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Academic literature on the topic 'Separation of the diastereomers'

Author: Grafiati

Published: 24 April 2022

Last updated: 30 July 2025

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Journal articles on the topic "Separation of the diastereomers"

1

Domalain, Virginie, Marie Hubert-Roux, Laurence Quéguiner, et al. "Ion mobility-mass spectrometry analysis of diarylquinoline diastereomers: Drugs used for tuberculosis treatment." European Journal of Mass Spectrometry 25, no. 3 (2018): 291–99. http://dx.doi.org/10.1177/1469066718813226.

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Mycobacterium tuberculosis infection results in more than two million deaths per year and is the leading cause of mortality in people infected with HIV. A new structural class of antimycobacterials, the diarylquinolines, has been synthesized and is being highly effective against both M. tuberculosis and multidrug-resistant tuberculosis. As diarylquinolines are biologically active only under their ( R,S) stereoisomeric form, it is essential to differentiate the stereoisomers ( R,S) and ( R,R). To achieve this, tandem mass spectrometry and ion mobility spectrometry-mass spectrometry have been pe

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Raffiunnisa, N. Jaishetty, P. Ganesh та ін. "Synthesis of Quinoline-Based New Chiral Derivatizing Reagents and its use in the Derivatization and Enantioseparation of Few Structurally Similar β-Blockers using Liquid Chromatography and Structural Optimization using DFT". Asian Journal of Chemistry 35, № 8 (2023): 1855–61. http://dx.doi.org/10.14233/ajchem.2023.28037.

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In this work, quinoline based new chiral derivatizing reagent was synthesized by introducing chiral amino acid (L-proline) in the molecule. Synthesized chiral derivatizing reagent was characterized by spectroscopic techniques (1H NMR, FT-IR, HRMS and CHNS analysis) and used in the synthesis of diastereomer of chosen β-blockers. The RP-HPLC system was used to separate synthesized diastereomers (indirect approach of enantioseparation). Acetonitrile and buffer solution was used as mobile phase for analysis. The effect of varying concentrations and pH of mobile phase was optimized for the separati

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Balaji, Narayan, Suresh Sulochana, Neeraj Saini, Siva A., and Ramesh Mullangi. "Validated Chiral LC-ESI-MS/MS Method for the Simultaneous Quantification of Darolutamide Diastereomers and Its Active Metabolite in Mice Plasma: Application to a Pharmacokinetic Study." Drug Research 68, no. 11 (2018): 615–24. http://dx.doi.org/10.1055/a-0580-7218.

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AbstractA simple, selective and reliable LC-MS/MS method was developed and validated for the simultaneous quantitation of darolutamide diastereomers (diastereomer-1 and diastereomer-2) and its active metabolite i. e. ORM-15341 in mice plasma using warfarin as an internal standard (IS) as per the regulatory guidelines. Plasma samples were extracted by liquid-liquid extraction and the chromatographic separation was achieved on a Chiralpak IA column with an isocratic mobile phase 5 mM ammonium acetate:absolute alcohol (20:80, v/v) at a flow rate of 1.0 mL/min. Detection and quantitation was done

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Biedermann, David, Martina Hurtová, Oldřich Benada, Kateřina Valentová, Lada Biedermannová, and Vladimír Křen. "Continuous Diastereomeric Kinetic Resolution—Silybins A and B." Catalysts 11, no. 9 (2021): 1106. http://dx.doi.org/10.3390/catal11091106.

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The natural diastereomeric mixture of silybins A and B is often used (and considered) as a single flavonolignan isolated from the fruit extract of milk thistle (Silybum marianum), silymarin. However, optically pure silybin diastereomers are required for the evaluation of their biological activity. The separation of silybin diastereomers by standard chromatographic methods is not trivial. Preparative chemoenzymatic resolution of silybin diastereomers has been published, but its optimization and scale-up are needed. Here we present a continuous flow reactor for the chemoenzymatic kinetic resolut

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Hasanova, U. A., Z. O. Qahramanova, and P. F. Huseynova. "USING OPTICALLY ACTIVE CHIRAL CROWN ETHER AT ENANTIOMERIC SEPARATION OF AMINES." Azerbaijan Chemical Journal, no. 3 (September 28, 2021): 59–62. http://dx.doi.org/10.32737/0005-2531-2021-3-59-62.

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The synthesized S-enantiomer of the crown ether was used as an adsorbent to separate the racemic mixture of L-alanine ether of phenamine into individual diastereomers by column chromatography. Chromatographic separation occurred due to the formation of complexes of different stability between diastereomers and optically selective adsorbents on a host-guest principle. The separated diastereomers were converted into enantiomers by hydrolysis. The structure and optical activity of the synthesized crown ether and separated enantiomers were investigated by physicochemical methods

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Luo, Weide, Elena Atrazheva, Nancy Fregeau, William H. Gmeiner, and J. William Lown. "Synthesis and separation of diastereomers of O-(2,2,2-trifluoroethyl)-3′,5′-dinucleoside phosphates." Canadian Journal of Chemistry 72, no. 6 (1994): 1548–55. http://dx.doi.org/10.1139/v94-193.

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The synthesis, diastereomeric separation, and characterization are described for a series of novel O-(2,2,2-trifluoroethyl)-3′,5′-dinucleoside phosphates, required for incorporation into antisense probes in the magnetic resonance imaging investigation of biodistribution. Preliminary assignment of the absolute configuration of the Rp and Sp diastereomers is made on the basis of 31 P NMR spectra.

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El Hammoumi, M. M., L. Ait Said, A. El Bachiri, and M. Khoukhi. "Kinetic Separation of cis-and trans-Limonene Epoxide: Reaction of Diastereomeric Mixture of Limonene Oxides with Secondary Amine and Carbamate." Asian Journal of Chemistry 33, no. 11 (2021): 2667–70. http://dx.doi.org/10.14233/ajchem.2021.23379.

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A simple kinetic separation of (1:1) diastereomeric mixture of limonene oxides was used to purify cis-and trans-diastereomers of (R)-(+)-limonene oxide. The epoxide ring of trans-isomer was selectively opened by (R)-N-methyl-(α-methyl-benzyl)amine. This secondary nucleophilic amine left cis-limonene oxide largely unreacted and was obtained up to 90% yield. In a diverse way, (R)-N-(α-methylbenzyl) ethyl carbamate, selectively catalyze hydrolysis of cis-limonene oxide to 1,2-limonene diol leaving trans-limonene oxide largely unreacted. The unreacted trans-limonene oxide was recovered in up to 75

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Tang, Xiaoyan, Andrea H. Westlie, Eli M. Watson, and Eugene Y. X. Chen. "Stereosequenced crystalline polyhydroxyalkanoates from diastereomeric monomer mixtures." Science 366, no. 6466 (2019): 754–58. http://dx.doi.org/10.1126/science.aax8466.

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Stereoselective polymerization of chiral or prochiral monomers is a powerful method to produce high-performance stereoregular crystalline polymeric materials. However, for monomers with two stereogenic centers, it is generally necessary to separate diastereomers before polymerization, resulting in substantial material loss and added energy cost associated with the separation and purification process. Here we report a diastereoselective polymerization methodology enabled by catalysts that directly polymerize mixtures of eight-membered diolide (8DL) monomers with varying starting ratios of chira

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Solanki, M., S. Sehlangia, V. S. Talismanov, et al. "Synthesis of a Series of Quinoline-Based New Chiral Reagent and its Application in Separation of Racemic Mexiletine followed by Liquid Chromatography and Confirmation of Results Using Molecular Modelling; A Complete Study." Asian Journal of Chemistry 36, no. 2 (2024): 404–10. http://dx.doi.org/10.14233/ajchem.2024.30926.

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In present work, L-valine-based new chiral derivatives were prepared by introducing hydrophobic groups. The prepared derivatives were then used to prepare quinoline-based chiral reagents under mild amidation reaction and esterification reaction. Spectroscopic techniques, such as HRMS, FT-IR, 1H NMR and CHNS analysis, were used to characterize the synthesized chiral reagents. The synthesized series of reagents was then used to derivatize diastereomers of racemic mexiletine and these diastereomers were separated using the RP-HPLC (a derivatization approach of enantioseparation). The mobile phase

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Sharma, N. K., L. Kaur, S. Alwera, V. S. Talismanov, A. K. Tripathi та A. Mondal. "Sensitive Detection and Enantioseparation of β-Blockers with Quinoline Based Active Chiral Reagents using HPLC: Separation Mechanism and DFT Modelling". Asian Journal of Chemistry 36, № 6 (2024): 1334–40. http://dx.doi.org/10.14233/ajchem.2024.31487.

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A sensitive and effective method for the detection and enantioseparation of β-blockers was developed. Three quinoline-based active chiral reagents were prepared followed by an amide and ester formation reaction. The synthesized active chiral reagents were characterized with spectroscopic techniques such as NMR, FT-IR, UV, HRMS and elemental analyzer. The active reagents were used in the diastereomerization of the racemic β-blockers (propranolol, metoprolol and carvedilol). Synthesized diastereomeric pairs were then subjected to RP-HPLC for chromatographic separation. The eluting phase, which c

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Dissertations / Theses on the topic "Separation of the diastereomers"

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Sistla, Venkata Subbarayudu [Verfasser], and Andreas [Akademischer Betreuer] Seidel-Morgenstern. "Formation and crystallization based separation of diastereomeric salts / Venkata Subbarayudu Sistla. Betreuer: Andreas Seidel-Morgenstern." Magdeburg : Universitätsbibliothek, 2012. http://d-nb.info/1053914121/34.

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Coss, Clifford Scott. "Minimally Competent Lewis Acid Catalysts. General Methods for the Synthesis and Separation of Diastereomeric Mixtures of Monorhamnolipids of Pseudomonas aeruginosa with Peracetate Glycoside Donors." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238915.

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Rhamnolipids are rhamnose-based glycolipids with strong biosurfactant properties. Because they are naturally occurring surfactants found in Gram-negative bacterial walls, rhamnolipids are biodegradable, low in toxicity and have the potential for bioremediation. However, rhamnolipids are biosynthesized as a large mixture of congeners, making purification poor and scalability difficult. The "green" properties of the compound make it a highly desirable alternative for the many carcinogenic and toxic synthetic surfactants on the market. A method for synthesizing rhamnolipids cost-effectively and a

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Kämmler, Lena [Verfasser], and Martin [Akademischer Betreuer] Maier. "Totalsynthese von Biselyngbyolid B und dessen (21Z)-Diastereomers, sowie Studien zur Totalsynthese von Biselyngbyasid / Lena Kämmler ; Betreuer: Martin Maier." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1196701261/34.

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Stensils, Elin. "Separation." Thesis, KTH, Arkitektur, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168616.

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Separation Mitt projekt rör sig kring temat separation, separation av funktioner, separation i fysisk bemärkelse och separation av människor. Jag spenderade mycket tid åt att undersöka kreamtoriet som anläggning, dess programdelar och platsen som vi fått till förfogande. Hela tiden rörde sig undersökningen tillbaka till separation, krematoriets funktionsseparering, åtskillnaden av industri och ceremoni. Jag valde att använda detta som en språngbräda för projektet. Krematoriet är som byggnad tydligt indelad i olika funktioner som försöker distansiera sig från varandra, den industriella och den

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Klüppel, André [Verfasser], Martin [Akademischer Betreuer] Hiersemann, and Norbert [Gutachter] Krause. "Ex-chiral-pool-Synthese des (11R,13S,14R,15R)-Diastereomers von (‒)-Lytophilippin A / André Klüppel ; Gutachter: Norbert Krause ; Betreuer: Martin Hiersemann." Dortmund : Universitätsbibliothek Dortmund, 2019. http://d-nb.info/1189420368/34.

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Ahmed, A. "Signal separation." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.595390.

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The problem of signal separation is a very broad and fundamental one. A powerful paradigm within which signal separation can be achieved is the assumption that the signals/sources are statistically independent of one another. This is known as Independent Component Analysis , (ICA). In this thesis, the theoretical aspects and derivation of ICA are examined, from which disparate approaches to signal separation are drawn together in a unifying framework. This is followed by a review of signal separation techniques based on ICA. Second order statistics based output decorrelation methods are employ

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Strid, Matilda. "Does Play Pre-separation Affect Separation Behaviors in Dogs?" Thesis, Linköpings universitet, Biologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148212.

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Separation anxiety is one of the most common behavioral disorder in companion dogs. Dogs not suffering from separation anxiety may still exhibit separation-related behaviors, which can differ depending on environmental contexts. In the present study, dogs without separation-related problems were video recorded during a short separation (3 min) from, and during reunion with, their owner. Comparison was done between if the dogs had played or been calm pre-separation. The dogs spent most time in proximity to the entrance and gazing towards where the owner left during separation. Their body-positi

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Bhattacharjee, Samita. "Prediction Of Separation Factor In Foam Separation Of Proteins." Thesis, Indian Institute of Science, 1994. https://etd.iisc.ac.in/handle/2005/132.

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Polyhedral foams offer large gas-liquid interfacial area associated with a small amount of liquid. Therefore, if a solute adsorbs preferentially at the interface, the concentration of the solute in the foam will be greater than in the solution from which the foam has been generated. This effect provides a simple method of concentrating materials which have a tendency to adsorb on the gas-liquid interface. This is particularly relevant to biomaterials like whole cells, proteins, enzymes etc., which are surface active and are present in low concentrations in the broth. Foam separation has theref

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Bhattacharjee, Samita. "Prediction Of Separation Factor In Foam Separation Of Proteins." Thesis, Indian Institute of Science, 1994. http://hdl.handle.net/2005/132.

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Polyhedral foams offer large gas-liquid interfacial area associated with a small amount of liquid. Therefore, if a solute adsorbs preferentially at the interface, the concentration of the solute in the foam will be greater than in the solution from which the foam has been generated. This effect provides a simple method of concentrating materials which have a tendency to adsorb on the gas-liquid interface. This is particularly relevant to biomaterials like whole cells, proteins, enzymes etc., which are surface active and are present in low concentrations in the broth. Foam separation has theref

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Hoettges, Kai F. "Miniaturisation in separation science : liquid-liquid separation on a chip." Thesis, University of Surrey, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252454.

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Books on the topic "Separation of the diastereomers"

1

Yarborough, A. Louise. Separation. Mill City Press, 2010.

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Bernstein, Hilda. Separation. Corvo, 2003.

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Rothschild, Jon, ed. Separation. Black Swan, 1995.

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Toda, Fumio, ed. Enantiomer Separation. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2337-8.

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Kumar, Ashok, Igor Yu Galaev, and Bo Mattiasson, eds. Cell Separation. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75263-9.

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Glangeaud, F. Wave separation. Editions Technip, 1994.

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Macasek, Feodor. Separation chemistry. Ellis Horwood, 1992.

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Budhiraja, R. P. Separation chemistry. New Age International (P) Ltd., Publishers, 2004.

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Jefferies, Dinah. The separation. Thorpe, 2015.

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1941-, Navratil James D., ed. Separation chemistry. Ellis Horwood, 1992.

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Book chapters on the topic "Separation of the diastereomers"

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Eller, Marika, Bengt Fransson, Barthélémy Nyasse, and Ulf Ragnarsson. "Separation of basic, diastereomeric peptides by reversed-phase ion-pair chromatography." In Peptides 1990. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3034-9_142.

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Bada, Jeffrey. "Diastereomers." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_425.

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Bada, Jeffrey. "Diastereomers." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_425.

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Bada, Jeffrey. "Diastereomers." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_425.

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Gooch, Jan W. "Diastereomers." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13552.

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Bada, Jeffrey. "Diastereomers." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_425-2.

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Grier, Savannah, Anna-Lee Stafford, and Kevin B. Meehan. "Separation." In Encyclopedia of Personality and Individual Differences. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-24612-3_1908.

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Nyman, Mattias. "Separation." In X.media.press. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18244-0_21.

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Gold, Lois. "Separation." In Between Love and Hate. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4899-6582-0_2.

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Nyman, Mattias. "Separation." In Edition PAGE. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-00768-6_14.

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Conference papers on the topic "Separation of the diastereomers"

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Liu, Jingyu, JingJing Zhou, Xinyan He, and Wei He. "Piano Concerto Source Separation Based on Speech Separation and Channel Attention." In 2024 International Conference on Culture-Oriented Science & Technology (CoST). IEEE, 2024. http://dx.doi.org/10.1109/cost64302.2024.00090.

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Koval, Dušan, Václav Kašička, Jiří Jiráček, and Michaela Collinsová. "Separation of phosphinic pseudopeptide diastereomers by CZE and RP-HPLC." In VIIIth Conference Biologically Active Peptides. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2003. http://dx.doi.org/10.1135/css200306045.

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Bilan, Dmitri, Sergiu Cojocari, Vsevolod Pogrebnoi, Natalia Sucman, and Fliur Macaev. "The opening of dehydropregnenolone epoxide leading to the non-saturated skeletal rearrangement product." In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab23.

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This report presents a compound that emerges as a product of the skeletal rearrangement following the opening of dehydropregnenolone epoxide (Figure 1). The opening of the epoxy cycle in dehydropregnenolone epoxide 1 in the presence of hydrochloric acid leads to the formation of two chromatographically inseparable diastereomers 2 and 3 (Figure 1).Figure 1. Scheme of the formation of diastereomers 2 and 3 In the literature, there is an example of the epoxide opening in absolute methanol. Thus, according to Girdhar et al [1], the reaction of compound 1 with dry HCl in dry MeOH at low temperature

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Marshall, Mark, Anna Krin, Sergio Domingos, Melanie Schnell, and Helen Leung. "THE CONVERSION OF STYRENE OXIDE ENANTIOMERS INTO SPECTROSCOPICALLY DISTINGUISHABLE DIASTEREOMERS THROUGH COMPLEXATION WITH 3,3,3-TRIFLUORO-1,2-EPOXYPROPANE." In 74th International Symposium on Molecular Spectroscopy. University of Illinois at Urbana-Champaign, 2019. http://dx.doi.org/10.15278/isms.2019.rh02.

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Mangoni, Maria Luisa. "Esculentin-1a Derived Peptide Diastereomers to Target Pseudomonas aeruginosa Lung Infection in Cystic Fibrosis: From Nature to Bench towards Therapeutic Application." In 36th European Peptide Symposium. The European Peptide Society, 2022. http://dx.doi.org/10.17952/36eps.2022.005.

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Mangoni, Maria Luisa, Bruno Casciaro, Floriana Cappiello, et al. "Esculentin-1a Derived Peptide Diastereomers to Target Pseudomonas aeruginosa Lung Infection in Cystic Fibrosis: From Nature to Bench towards Therapeutic Application." In 36th European Peptide Symposium. The European Peptide Society, 2022. http://dx.doi.org/10.17952/36eps/36eps.2022.009.

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Landry, Steven, and Taehoon Kim. "Separation Standards under Automated Separation Assurance." In 10th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference. American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-9386.

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Pogrebnoi, Vsevolod, Natalia Sucman, and Fliur Macaev. "The spirocyclopropane with fragments of dehydroabietic acid and aminooxindole." In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab15.

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The abstract presents the synthesis of new highly functionalized spirocyclopropane with the fragment of natural compound – dehydroabietic acid 1 (DAK), which can be potentially active against some diseases.It is a known that spirocyclopropanes have anti-HIV activity [1]. From the other side there are a lot of natural and synthetical oxindoles with various biological activities [2]. And the last fact – that the high optical purity and the molecular structure of tricyclic diterpenoid 1 make it an attractive object for studying new various properties, such as the synthesis of new derivatives with

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Fakheri, Ahmad. "Flow Separation." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12409.

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In thermal science courses, flow over curved objects, like cylinders or spheres are generally discussed qualitatively, followed by the presentation of numerical or experimental results for the drag coefficient, Nusselt number, and flow separation. Rarely, there is much discussion of how solutions are obtained. In this paper the flow separation is first introduced by solving the Falkner-Skan flow. The process for numerical solution of equations is presented to show that the flow separates at a plate angle of about −18°. Comparisons are drawn between this and flow over a cylinder. The non-simila

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Mallick, Satya P., Todd Zickler, Peter Belhumeur, and David Kriegman. "Dichromatic separation." In ACM SIGGRAPH 2006 Sketches. ACM Press, 2006. http://dx.doi.org/10.1145/1179849.1180057.

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Reports on the topic "Separation of the diastereomers"

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Skone, Timothy J. Gravity Separation. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1509068.

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Skone, Timothy J. Magnetic Separation. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1509080.

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Heung, L. K. Separation Membrane Development (Separation Using Encapsulated Metal Hydride). Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/799397.

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Fred Ahrens and Tim Patterson. Acoustic Separation Technology. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/793330.

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BUREAU OF NAVAL PERSONNEL WASHINGTON DC. Pre-Separation Guide. Defense Technical Information Center, 1992. http://dx.doi.org/10.21236/ada282965.

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Parlett, Beresford, and Tzon-Tzer Lu. Minimum Eigenvalue Separation. Defense Technical Information Center, 1992. http://dx.doi.org/10.21236/ada256570.

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Donald P. McCollor and John P. Kay. HYDROGEN SEPARATION MEMBRANES. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/778449.

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Donald P. McCollor and John P. Hurley. Task 6.5/6.7.1 - Materials for Gas Separation and Hydrogen Separation Membranes. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/1675.

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Donald P. McCollor and John P. Hurley. Task 6.5/6.7.1 - Materials for Gas Separation and Hydrogen Separation Membranes. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/1680.

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Smith, B. F., N. Sauer, R. M. Chamberlin, et al. Separation science and technology. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/307877.

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