Results 241 to 250 of about 691,764 (293)
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Optical purity, enantiomeric excess and the Horeau effect.
Organic & Biomolecular Chemistry, 2020The optical purity of an enantiomeric mixture deduced from specific rotation measurements was found by Horeau to be different from its enantiomeric excess, which came to be known as the Horeau effect.
P. Polavarapu
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Measuring enantiomeric excess on the fly
C&EN Global Enterprise, 2018Mitch Jacoby
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Analytical Chemistry, 2021
The determination of the enantiomeric excess and absolute configuration of chiral compounds is indispensable in synthetic, pharmaceutical, and biological chemistry.
Sumin Jang +4 more
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The determination of the enantiomeric excess and absolute configuration of chiral compounds is indispensable in synthetic, pharmaceutical, and biological chemistry.
Sumin Jang +4 more
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Sensing of enantiomeric excess in chiral carboxylic acids.
Chemical Communications, 2015Cinchona-derived fluorescent molecules are used in a cross-reactive sensor array for the sensing of enantiomeric excess (ee) in carboxylate drugs analysis.
A. Akdeniz +3 more
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Enantiomeric Excesses in Meteoritic Amino Acids
Science, 1997Gas chromatographic-mass spectral analyses of the four stereoisomers of 2-amino-2,3-dimethylpentanoic acid (DL-α-methylisoleucine and DL-α-methylalloisoleucine) obtained from the Murchison meteorite show that the L enantiomer occurs in excess (7.0 and 9.1%, respectively) in both of the enantiomeric pairs.
J R, Cronin, S, Pizzarello
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Concentration-Independent Stereodynamic g-Probe for Chiroptical Enantiomeric Excess Determination.
Journal of the American Chemical Society, 2017Enantiomeric excess (ee) determination is crucial in many aspects of science, from synthesis to materials. Within this subject, coupling molecular sensors with chiroptical techniques is a straightforward approach to the stereochemical analysis of chiral molecules, especially in terms of process immediacy and labor.
Paolo Zardi +3 more
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Determination of enantiomeric excess by capillary electrophoresis
Electrophoresis, 2000Capillary electrophoresis (CE) is becoming an established method for the determination of chiral trace impurities. This paper provides an overview of the state of the art of CE for such determinations. Detection limits of 0.1% impurity is widely accepted as a minimum requirement for chiral trace impurity determinations.
L G, Blomberg, H, Wan
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Optical Analysis of Reaction Yield and Enantiomeric Excess: A New Paradigm Ready for Prime Time.
Journal of the American Chemical Society, 2018This Perspective highlights the advances of optical methods for asymmetric reaction discovery. Optical analysis allows for the determination of absolute configuration, enantiomeric excess and reaction yield that is amenable to high-throughput ...
Brenden T Herrera +4 more
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Enantiomeric Excesses and Electronic Chirality Measure
Journal of the American Chemical Society, 2003We present an approach to measure the amount of chirality in the electronic wave function and apply it to the study of a set of asymmetric aminohydroxylation reactions. The correlation coefficient between the chirality measure and the enantiomeric excesses is larger than 0.9 and suggests that this phenomenological approach can be a valuable tool to ...
Luca, Bellarosa, Francesco, Zerbetto
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Measurement of Enantiomeric Excess Using Molecularly Imprinted Polymers
Organic Letters, 2002[reaction: see text] A new method is presented for the measurement of enantiomeric excess (ee) utilizing molecularly imprinted polymers (MIPs). The method is demonstrated to be accurate and rapid, as the ee values can be calculated from straightforward concentration measurements.
Yizhao, Chen, Ken D, Shimizu
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