METHODS FOR DETERMINING ENANTIOMERIC PURITY WITH IMPROVED CHIRAL SELECTORS
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United States of America Patent
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Issued Date -
Feb 24, 2011
app pub date -
Oct 17, 2008
filing date -
Oct 17, 2007
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Abstract
A strategy, or method, for the quantitative determination of enantiomeric purity that combines lin situ enantiomer diastereomerization', spectroscopy, and chemometric modeling. Spectral data for samples of known enantiomeric composition is subjected to a type of multivariate regression modeling known as partial least squares (“PLS-I”) regression. The PLS-I regression produces a mathematical model that can be used to predict the enantiomeric composition of a set of samples of unknown enantiomeric purity. In this strategy, the guest-host complexation utilizes improved chiral selector molecules, including chiral amines and chiral alcohols such as phenylethylamine and 1,2-propanediol, that form ion pairs or covalent bonds with the chiral analytes.
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