Results 21 to 30 of about 667,303 (272)

Determination of Enantiomeric Excess and Diastereomeric Excess via Optical Methods. Application to α-methyl-β-hydroxy-carboxylic acids. [PDF]

Org Chem Front, 2023
Moor SR, Howard JR, Herrera BT, McVeigh MS, Marini F, Keatinge-Clay AT, Anslyn EV.   +6 more
europepmc   +3 more sources

Accurate Determination of Enantiomeric Excess Using Raman Optical Activity [PDF]

Symmetry, 2022
The optical purity of a chiral sample is of particular importance to the analytical chemistry and pharmaceutical industries. In recent years, the vibrational optical activity (VOA) has become established as a sensitive and nondestructive technique for the analysis of chiral molecules in solution. However, the relatively limited accuracy in the range of
Pavel Michal, Jana Hudecová, Radek Čelechovský, Milan Vůjtek, Michal Dudka, Josef Kapitán   +5 more
openalex   +2 more sources

Determination of enantiomeric excess in amine derivatives with molecular self-assemblies. [PDF]

Angewandte Chemie, 2015
AbstractWe report the first fluorescence‐based assay for the rapid determination of the ee value of amines, amino alcohols, and amino acid esters. The method uses the self‐assembly of 2‐formylphenylboronic acid with a chiral diol and a chiral amine or derivatives (of unknown chirality) to produce two diastereomeric iminoboronates that differ in their ...
Elena G. Shcherbakova, Tsuyoshi Minami, V. Brega, Tony D James, Pavel Anzenbacher   +4 more
semanticscholar   +3 more sources

Visualization of enantiorecognition by excited-state conformation modulation [PDF]

Nature Communications
Chiral purity is crucial in life sciences, emphasizing the importance of precise enantiomeric identification and the development of analytical techniques.
Zizhao Huang, Ying Hu, Jie Sun, Zhenyi He, Tao Jiang, He Tian, Xiang Ma   +6 more
doaj   +2 more sources

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   +3 more sources

Chiral recognition and determination of enantiomeric excess by mass spectrometry: A review

Analytica Chimica Acta, 2017
Xiangying Yu, Zhong‐Ping Yao
openalex   +3 more sources

A note on the Noyori model for chiral amplification in the aminoalcohol-catalyzed reaction of aldehydes with dialkylzinc [PDF]

Journal of the Serbian Chemical Society, 1999
The Noyori model of chiral amplification in the alkylation of aldehydes by means of dialkylzinc, catalyzed by chiral aminoalcohols, is further elaborated.
Gutman Ivan
doaj   +3 more sources

Enantiomeric Excess Bupivacaine in a Lavender Oil NLC Tested in a Melanoma Model: Prolonged Release and Anticancer Effect. [PDF]

Mol Pharm
Geronimo G, Rodrigues da Silva GH, de Moura LD, de Carvalho FV, Mendonça TC, Olivo LB, Verlindo de Araújo B, Dalla Costa TC, Lavareze L, Mariano FV, de Paula E.   +10 more
europepmc   +2 more sources

Authenticity control of pine sylvestris essential oil by chiral gas chromatographic analysis of α-pinene

Scientific Reports, 2021
Numerous terpenes present in essential oils (EOs) display one or more chiral centers. Within the same genus the enantiomeric ratio of these compounds can be different. Thus, the determination of enantiomers is a valuable tool to evaluate authenticity and
Martina Allenspach, Claudia Valder, Daniela Flamm, Christian Steuer   +3 more
doaj   +1 more source

2D Ising Model for Enantiomer Adsorption on Achiral Surfaces: L- and D-Aspartic Acid on Cu(111)

Entropy, 2022
The 2D Ising model is well-formulated to address problems in adsorption thermodynamics. It is particularly well-suited to describing the adsorption isotherms predicting the surface enantiomeric excess, ees, observed during competitive co-adsorption of ...
Soham Dutta, Andrew J. Gellman
doaj   +1 more source