Process to separate mixtures of enantiomeric arylpropionic acids
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United States of America Patent
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Jan 8, 1991
Grant Date -
N/A
app pub date -
Jun 27, 1989
filing date -
Jul 19, 1988
priority date (Note) -
Expired
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Abstract
A process is described in which a mixture of enantiomeric arylpropionic acid is split and one of enantiomeric forms of the acid is recovered. The mixture is transformed into a diastereoisomeric salt by a reaction with a chiralic base and an inert solvent, and the desired acid enantiomer is removed from the reaction product. The transformation to a diastereoisomeric salt takes place in a polar solvent. The salt produced is recrystallized several times and the thus purified salt is split in a dilute mineral acid.
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