Results 121 to 130 of about 42,748 (282)

Rapid transient absorption and biliary secretion of enantiomeric cholesterol in hamsters

open access: yesJournal of Lipid Research, 2006
To probe the pathway and specificity of cholesterol absorption, the synthetic enantiomer of cholesterol (ent-cholesterol) and cholesterol were labeled with deuterium, gavaged into hamsters, and measured by negative ion mass spectrometry.
Emily J. Westover   +6 more
doaj  

Iridium‐Catalyzed Enantioselective Intramolecular Hydroarylation of Allenes: Formal Synthesis of (+)‐Rhazinilam

open access: yesAngewandte Chemie, EarlyView.
A highly enantioselective iridium‐catalyzed hydroarylation of allene‐tethered pyrroles and indoles that provides access to relevant heterocyclic systems bearing vinyl‐substituted 3ry or 4ry stereocenters is reported. Its synthetic potential was exemplified with a very short, highly enantioselective formal synthesis of (+)‐Rhazinilam, whereas DFT ...
Andrés Arribas   +4 more
wiley   +2 more sources

Enantioselective analysis of omeprazole in pharmaceutical formulations by chiral high-performance liquid chromatography and capillary electrophoresis

open access: yesJournal of the Brazilian Chemical Society, 2004
We developed two sensitive and simple assay procedures based on high- performance liquid chromatography and capillary electrophoresis (CE) for the enantioselective analysis of omeprazole in pharmaceutical formulations.
Bonato Pierina S., Paias Fernanda O.
doaj  

Hemodynamic and Electrophysiologic Effects of Disopyramide Enantiomers in a Canine Blood Superfusion Model

open access: bronze, 1989
Gregory A. Kidwell   +3 more
openalex   +1 more source

Biosynthese des Rotalgen‐Diterpens Peyssonnosol in Bakterien

open access: yesAngewandte Chemie, EarlyView.
Zwei Terpensynthasen aus Anaerolineae‐Bakterien katalysieren die Biosynthese von Peyssonnosen‐artigen Diterpenen aus Rotalgen. Ortsgerichtete Mutagenese ermöglichte einen partiellen Funktionswechsel, der zur Bildung zusätzlicher Nebenprodukte führte.
Zhiyong Yin   +10 more
wiley   +1 more source

Light‐Driven Ratchet Mechanism Accelerates Regioselective Metal‐Cation Exchange in a Heterobimetallic Helicate

open access: yesAngewandte Chemie, EarlyView.
Photoswitchable homo‐ and heterobimetallic helicates form with high diastereo‐ and regioselectivity via single‐step self‐assembly or self‐sorting. White‐light exposure autonomously operates one helicate as a molecular ratchet, promoting the selective formation of an out‐of‐equilibrium structure.
Maximilian J. Notheis   +2 more
wiley   +2 more sources

Advancing Sulfinyl Radical Chemistry: An Asymmetric Smiles Rearrangement with Chiral Sulfoxides

open access: yesAngewandte Chemie, EarlyView.
A visible‐light‐driven, asymmetric sulfinyl‐Smiles rearrangement enables the enantioselective trifunctionalization of chiral sulfoxides via radical addition, 1,5‐aryl migration, and sulfinyl radical interception. By tuning the redox potentials of key components, this cascade forms two C─C and one C─S bond in a single step, yielding enantioenriched ...
Yawen Hu, Till Schreyer, Cristina Nevado
wiley   +2 more sources

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