Results 81 to 90 of about 39,817 (294)
Advanced Optical Materials, EarlyView.For most microscopy measurements the sample is placed on a substrate, which causes symmetry breaking, especially relevant for chiral plasmonic nanostructures. DNA origami mediated X‐shaped AuNR dimers showing high structural purity in solution, exhibit significant diversity in lineshapes and signal intensities for their circular differential scattering
Amrita Chakraborty +9 more
wiley +1 more source
Chiral Thioxanthones as Modulators of P-glycoprotein: Synthesis and Enantioselectivity Studies
Molecules, 2018 Recently, thioxanthone derivatives were found to protect cells against toxic P-glycoprotein (P-gp) substrates, acting as potent inducers/activators of this efflux pump.
Ana Lopes +6 more
doaj +1 more source
Probing the optical chiral response of single nanoparticles with optical tweezers [PDF]
, 2020 We propose an enantioselective scheme to sort homogeneous chiral particles using optical tweezers. For a certain range of material parameters, we show that a highly focused circularly-polarized laser beam traps particles of a specific chirality selected by the handedness of the trapping beam. Furthermore, by applying a transverse Stokes drag force that
arxiv +1 more source
Advanced Synthesis &Catalysis, EarlyView.Abstract Herein we present a novel one‐pot methodology for the synthesis of enantioenriched 2H‐pyrrolespirosuccinimides by copper‐catalyzed reactions on Ugi adducts derived from enantiopure α‐alkylbenzyl amines through a chirality transfer process. We have proposed a mechanism, supported by density functional theory (DFT) calculations, where a hydrogen
Javier Gómez‐Ayuso +3 more
wiley +1 more source
Enantioselective Extraction of Ofloxacin Enantiomers Using Ester Alcohol L-Tartarate as Chiral Selector [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2009 The distribution behavior of ofloxacin enantiomers was examined in the aqueous and organic solvent of a two-phase system containing chiral selector L-tartarate.
Xiaoqing Chen Feipeng Jiao, Xinyu Jiang
doaj
Molecules, 2019 The arylacetonitrilase from the bacterium Pseudomonas fluorescens EBC191 has been intensively studied as a model to understand the molecular basis for the substrate-, reaction-, and enantioselectivity of nitrilases.
Andreas Stolz +3 more
doaj +1 more source
Molecules, 2023 Synthetic cathinones, such as 3,4-methylenedioxypyrovalerone (MDPV), are widely abused due to their psychostimulant effects. As they are chiral molecules, studies of their stereochemical stability (racemization can occur in certain temperatures and ...
Ana Sofia Almeida +5 more
doaj +1 more source
Pot‐Economical Synthesis of Fluorinated Pyrrolizinone Derivatives
Advanced Synthesis &Catalysis, EarlyView.Abstract A new family of fluorinated dihydropyrrolizinones has been synthesized starting from fluorinated enamino amides and aliphatic conjugated ketones. The reaction comprises a cross metathesis reaction followed by a tandem cycloaromatization/ enamine hydrolysis/ intramolecular Friedel‐Crafts alkylation sequence.
Lidia Prieto +6 more
wiley +1 more source
Influence of Phosphoramidites in Copper-Catalyzed Conjugate Borylation Reaction [PDF]
, 2012 Copper(I) has become the preferred metal to catalyze the β-boration of α,β-unsaturated carbonyl compounds, and now we demonstrate that easily accessible monodentate chiral ligands, such as phosphoramidites and phosphites, can be convenient alternative ...
Bonet, Amadeu, +6 more
core +9 more sources
Recent Advances in Enantioselective Photochemical Reactions of Stabilized Diazo Compounds
Molecules, 2019 Diazo compounds have proven to be a useful class of carbenes or metal carbenoids sources under thermal, photochemical, or metal-catalyzed conditions, which can subsequently undergo a wide range of synthetically important transformations.
Ting-Bi Hua +2 more
doaj +1 more source