Abstract
A procedure is described which allows the on-line recovery of enantiomers following semi-preparative chiral separation by RP-HPLC using beta-cyclodextrin in the mobile phase. By this method, the phenothiazine antihistamine trimeprazine (I) was resolved into its antipodes at greater than 95% optical purity at a throughput of more than 1 mg of each enantiomer per hour, using 4 mm i.d. columns. The recovered trimeprazine was found to be free from cyclodextrin.
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