Results 11 to 20 of about 33,103 (197)
Importance of molecular symmetry for enantiomeric excess recognition by NMR [PDF]
Chemical Communications, 2022 Porphyrins with an exposed inner core N–H system respond to a chiral guest with exceptionally sensitive enantiomeric excess detection.
Karolis Norvaiša +5 more
openaire +3 more sources
Asymmetric Meerwein-Ponndorf-Verley reduction of long chain keto alkanoic acid methyl esters [PDF]
Journal of the Serbian Chemical Society, 2007 3-, 7- and 13-Monoketo tetradecanoic acid methyl esters carrying a keto group at the ends and at the middle of the chain with 14 carbon atoms were reduced by a Meerwein-Ponndorf-Verley reaction in the presence of R-(+)-1,1'-binaphthalene- 2,2'-diol, 1,2 ...
Onar Çelik Hülya +2 more
doaj +3 more sources
Indian Journal of Anaesthesia, 2015 Background and Aims: Local anaesthetics are drugs that are widely used in clinical practice. However, the effects of these drugs on the neuromuscular junction and their influence on the blockade produced by non-depolarising neuromuscular blocking drugs ...
Angelica de Fátima de Assunção Braga +5 more
doaj +1 more source
The Surface Electroclinic Effect near the First Order Smectic-A*--Smectic-C* transition [PDF]
, 2011 We analyze the surface electroclinic effect (SECE) in a material that exhibits a first order bulk smectic-$A^*$ (Sm-$A^*$) -- smectic-$C^*$ (Sm-$C^*$) transition.
Rudquist, Per, Saunders, Karl
core +2 more sources
Field-induced diastereomers for chiral separation [PDF]
, 2019 A novel approach for the state-specific enantiomeric enrichment and the spatial separation of enantiomers is presented. Our scheme utilizes techniques from strong-field laser physics, specifically an optical centrifuge in conjunction with a static ...
Küpper, Jochen +4 more
core +2 more sources
Organocatalytic Properties of 3,4-Dihydroxyprolines
Chemistry Proceedings, 2023 The synthesis and organocatalytic properties of (2S,3R,4R)-3,4-bis((tert-butyldimethylsilyl)oxy)pyrrolidine-2-carboxylic acid are reported. Using the aldol condensation of cyclohexanone with p-nitrobenzaldehyde as a model, a yield of 86%, an enantiomeric
Ramón J. Estévez +3 more
doaj +1 more source
Synthesis of Optically Active Bifunctional Building Blocks through Enantioselective Copper-Catalyzed Allylic Alkylation Using Grignard Reagents [PDF]
, 2007 Enantioselective copper-catalyzed allylic alkylations were performed on allylic bromides with a protected hydroxyl or amine functional group using several Grignard reagents and Taniaphos L1 as a ligand.
Feringa, Ben L., +3 more
core +1 more source
Frontiers in Plant Science, 2022 The volatile fraction of plant-based foods provides useful functional information concerning sample-related variables such as plant genotype and phenotype expression, pedoclimatic and harvest conditions, transformation/processing technologies, and can be
Federico Stilo +6 more
doaj +1 more source
Journal of Lipid Research, 1982 Simple methods for determining the enantiomeric purity of mevalonolactone and linalool by NMR using the chiral shift reagent Eu(hfc)3 are reported. These methods are more reliable than polarimetry and require only a few milligrams of sample to detect as ...
W K Wilson, T J Scallen, C U Morrow
doaj +1 more source
Cannabis through the looking glass: chemo- and enantio-selective separation of phytocannabinoids by enantioselective ultra high performance supercritical fluid chromatography [PDF]
, 2017 By using the Inverted Chirality Columns Approach (ICCA) we have developed an enantioselective UHPSFC method to determine the enantiomeric excess (ee) of (-)-Δ(9)-THC in medicinal marijuana (Bedrocan®).
Cavazzini, A +7 more
core +2 more sources