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Ten-Step Total Synthesis of (±)-Phaeocaulisin A Enabled by Cyclopropanol Ring-Opening Carbonylation. [PDF]
J Am Chem SocLiu C, Zhang M, Zeng L, Wan Y, Dai M.
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Moxalactam epimer kinetics in children
Clinical Pharmacology and Therapeutics, 1982The kinetics of the R and S epimers of moxalactam were followed after single intravenous doses of 50 mg/kg to 12 patients, 8 to 45 mo old, with cellulitis or epiglottitis. High-pressure liquid chromatography was used to determine serum concentrations. Total body clearance and apparent volume of distribution of the R epimer were higher than those of the
M C, Nahata, D E, Durrell, W J, Barson
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Antibacterial activity of resolved temocillin epimers
Journal of Antimicrobial Chemotherapy, 1986The antibacterial activity of pure resolved R and S epimers of temocillin was determined in a variety of in-vitro test systems, including those that allowed measurement of activity during the early period following exposure to the agents, thus minimising the effect of epimerization.
A R, White +3 more
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Collection of Czechoslovak Chemical Communications, 1981
The structure (9R,10S)-7-deoxyaklavinone (VII) was assigned to a minor metabolite isolated from Streptomyces coeruleorubidus on the basis of 1H, 13C NMR and CD spectra. Evidence that compounds II and VII, isomeric with 7-deoxyaklavinone, are natural compounds is presented.
Josef V. Jizba +4 more
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The structure (9R,10S)-7-deoxyaklavinone (VII) was assigned to a minor metabolite isolated from Streptomyces coeruleorubidus on the basis of 1H, 13C NMR and CD spectra. Evidence that compounds II and VII, isomeric with 7-deoxyaklavinone, are natural compounds is presented.
Josef V. Jizba +4 more
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The potential of VCD to resolve the epimer vs. inverse epimer quandary
Computational and Theoretical Chemistry, 2012Abstract The determination of whether two stereoisomers constitute a pair of epimers or if they differ in their configuration at all stereogenic centers bar one can be a formidable challenge and represent a problem of greater complexity than just determination of absolute configuration per se.
Karel D. Klika +4 more
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Electrophoresis of Glucose Epimers
Nature, 1957THE movement of sugars in an electric field has already been used in certain analytical and preparative methods. This movement is based on the principle that borate ions form complexes with hydroxyl groups in sugars, so that these will move towards the anode in a borate buffer.
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7-Hydroxydehydroepiandrosterone epimers in the life span
The Journal of Steroid Biochemistry and Molecular Biology, 2001Evidence has been accumulated that 7-hydroxyepimers of dehydroepiandrosterone (7-OH-DHEA), may act as locally active immunomodulatory and immunoprotective agents, counteracting exaggerated actions of glucocorticoids. Since Skinner et al. (1977) developed the first unspecific RIA, it has been known that 7alpha-OH-DHEA is present in near nanomolar ...
R, Hampl, M, Hill, L, Stárka
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European Journal of Mass Spectrometry, 2004
Galβ1–4GlcNAc-6,6′-disulfate and 2′-epimer corresponding to Galβ1–4ManNAc-6,6′-disulfate were distinguished by mass spectrometry by utilizing fast atom bombardment (FAB), electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) methods. As for the steric information, negative-ion ESI mass spectrometry/mass spectrometry (MS/
Yoko, Ohashi +6 more
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Galβ1–4GlcNAc-6,6′-disulfate and 2′-epimer corresponding to Galβ1–4ManNAc-6,6′-disulfate were distinguished by mass spectrometry by utilizing fast atom bombardment (FAB), electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) methods. As for the steric information, negative-ion ESI mass spectrometry/mass spectrometry (MS/
Yoko, Ohashi +6 more
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Stereoselective synthesis of (+)-boronolide and its 8-epimer
Organic & Biomolecular Chemistry, 2004Starting from readily available carbohydrates the synthesis of 8-epi-(+)-boronolide 19 and (+)-boronolide was achieved with diastereoselective propargylation of alpha-oxygenated aldehyde as a key step.
Shou-Gang, Hu, Tai-Shan, Hu, Yu-Lin, Wu
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