Abstract
The selective reduction of a keto group in the presence of an aldehyde group with a superabsorbed alcohol dehydrogenase in an organic solvent is described. Remarkably a high preference for the reduction of the keto group was found. For example the 4-acetylbenzaldehyde was reduced with Chiralidon-R to the chiral alcohol (R)-1-(4-formylphenyl)ethanol with 96.5% yield.