Abstract
AbstractA method is described for the synthesis and optical purity determination of (−)‐(R)‐ and (+)‐(S)‐econazole via the optically pure intermediates, (R)‐ and (S)‐imidazolylethanol, which are available by chromatographic resolution or by fractional crystallization of diastereomeric O,O′‐disubstituted (R*;R*)‐ or (S*;S*)‐tartaric acid monoesters of the parent imidazolylethanol racemate. Furthermore, this method allows the chromatographic assignment of the absolute configuration of the chiral center of the imidazolylethanol enantiomers and consequently of econazole enantiomers. In addition, a direct liquid chromatographic enantioseparation method for the determination of the optical purity of (R)‐ and (S)‐econazole and other chiral imidazoles on a protein type CSP (OVM) is described and applied to confirm chromatographically the absolute configuration evaluations. © 1994 Wiley‐Liss, Inc.
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