Abstract
The specificity of horse liver alcohol dehydrogenase (HLADH) with respect to unsubstituted five-, six-, and seven-membered ring 3- and 4-thiaketone and -thiaalcohol substrates has been examined. The enzyme is found to have a broad tolerance of the structural variations within this series. HLADH also exhibits encouraging (up to 46%) enantiotopic and enantiomeric specificity in preparative-scale reduction and oxidation reactions of the heterocyclic ketones and alcohols respectively.