Results 161 to 170 of about 691,764 (293)

Selected Ion Monitoring Using Low-Cost Mass Spectrum Detectors Provides a Rapid, General, and Accurate Method for Enantiomeric Excess Determination in High-Throughput Experimentation. [PDF]

ACS Catal, 2022
Korch KM, Hayes JC, Kim RS, Sampson J, Kelly AT, Watson DA.   +5 more
europepmc   +1 more source

Development of an Efficient Stereoretentive Para‐Claisen‐Cope Rearrangement

ChemistryEurope
A stereoretentive para‐Claisen‐Cope rearrangement of chiral aryl‐allyl ethers is reported, achieving near‐perfect chirality transfer thereby furnishing products with exceptional enantiomeric excess (up to > 98% ee) as single regioisomers.
Johanna Breinsperger, Maximilian Kaiser, Nicolas Kratena, Peter Gärtner   +3 more
doaj   +1 more source

Roupala montana Aubl. Essential Oil: Chemical Composition and Emerging Biological Activities

Molecules
Roupala montana (Proteaceae) is a shrub native to subtropical and tropical regions of Central and South America. The EO extracted from R. montana was analyzed for its chemical composition and biological activities. GC analysis revealed that the essential
Luis Cartuche, Mireya Guayllas-Avila, Leydy Nathaly Castillo, Vladimir Morocho   +3 more
doaj   +1 more source

One-pot analysis of enantiomeric excess of free amino acids by electrospray ionization mass spectrometry. [PDF]

RSC Adv, 2021
Nakakoji T, Sato H, Ono D, Miyake H, Mieda E, Shinoda S, Tsukube H, Kawasaki H, Arakawa R, Shizuma M.   +9 more
europepmc   +1 more source

Determination of Enantiomeric Excess Using the Ultraviolet—Circular Dichroism and the High-Performance Liquid Chromatography—Circular Dichroism Methods

, 2003
Li Chen, Yanjun Zhao, Feng Gao, Marc Garland   +3 more
openalex   +2 more sources

Asymmetric Hydride Shift Reactions Catalyzed by Chiral Aluminium Complexes

Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.
An asymmetric intramolecular hydride shift reaction has been developed that is catalyzed by Al Lewis acids in conjunction with a chiral BINOL‐derived ligand. Racemic THP substrates are transformed into cyclohexene products via an intermediate prochiral enone; which undergoes a key 1,5‐hydride shift reaction.
Mostafa M. Amer, Jingyan Hou, Jinfang Wang, Akvile Mazeikaite, Timothy J. Donohoe   +4 more
wiley   +2 more sources

Amplification of Enantiomeric Excess in a Proline‐Mediated Reaction [PDF]

Angewandte Chemie International Edition, 2004
Suju P, Mathew, Hiroshi, Iwamura, Donna G, Blackmond   +2 more
openaire   +2 more sources

Dual‐Mode Thio‐MacMillan Organocatalysts: Stereoselective Diels–Alder Reactions or Sacrificial Self‐Cyclization to N‐Bridged Bicyclic Lactams

Chemistry – A European Journal, Volume 32, Issue 5, 2 February 2026.
The study of the Diels–Alder reaction of cinnamaldehyde and cyclopentadiene, catalyzed by chiral imidazolidine‐4‐thiones, led to the discovery of a highly regio‐ and stereoselective Michael‐addition and consecutive ring closure. Here, the imidazolidine‐4‐thione not only catalytically activates cinnamaldehyde but also participates as the nucleophile to ...
Marian S. R. Ebeling, Luca V. Parziale, Marc Sachsenhauser, Christoph J. B. Seifert, Nathalie J. Kurrle, Oliver Trapp   +5 more
wiley   +1 more source

Photochemical Deracemization of Chromanes and its Application to the Synthesis of Enantiopure Bioactive Compounds

Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.
Various substituted chromane‐2‐carboxamides were successfully deracemized by employing a chiral benzophenone (BP, 10 mol%) as photocatalyst and an achiral thiol as additive (20 mol%). The method was applied to the concise enantioselective synthesis of five active pharmaceutical ingredients.
Biki Ghosh, Maximilian Iglhaut, Daria Babushkina, Mike Pauls, Christoph Bannwarth, Thorsten Bach   +5 more
wiley   +2 more sources

Harnessing Non‐Covalent Protein–Protein Interaction Domains for Production of Biocatalytic Materials Systems

Advanced Functional Materials, Volume 36, Issue 11, 5 February 2026.
Non‐covalent protein–protein interactions mediated by SH3, PDZ, or GBD domains enable the self‐assembly of stable and biocatalytically active hydrogel materials. These soft materials can be processed into monodisperse foams that, once dried, exhibit enhanced mechanical stability and activity and are easily integrated into microstructured flow ...
Julian S. Hertel, Maria Alessandra Martini, Marius Stoeckle, Annika J. Weber, Kersten S. Rabe, Christof M. Niemeyer   +5 more
wiley   +1 more source