| abstract |
A propargylic alcohol, enriched in the (R)-enantiomer, has formula (I) wherein R is C1-4 alkoxy, halogen, or C1-4 alkyl optionally substituted by OH or halogen. This may be prepared by the steps of: (a) enantioselective (R)-esterification of the racemic alcohol using an acyl donor and a first enzyme; (b) removal of the unreacted (S)-alcohol; and (c) enantioselective hydrolysis of the (R)-ester, using a second enzyme. The alcohol can be converted to a prostaglandin by known means. |