Separation and optical resolution of 6 diastereomers and 25 racemates of β‐lactams were examined by HPLC on chiral stationary phases composed of six cellulose and one amylose tris(phenylcarbamate) derivatives. Most β‐lactams were optically resolved at least by one of the derivatives. The absolute configuration of β‐lactams was estimated by CD spectroscopy.
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Okamoto et al. (1989) studied this question.
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