摘要:
Bakers' yeast reduction of 4-oxo-3-tetrahydrothiopyranylacetates proceeds with high enantioselectivity, leading to optically pure diastereomeric alcohols. The synthetic utility of the present reaction is demonstrated in an expedient synthesis of (-)-(1S,2S,3S,4R)-3,4-epoxy-2-hydroxyethylcyclopentan-1-ol, a useful prostaglandin intermediate, in optically pure form using the Ramberg-Baecklund reaction as a key step.