The enantioselectivity of enzymatic hydrolysis of carboxylic esters of various 1,2-ketals of glycerol has been investigated. The influence of the ketal group has been studied. A number of lipases and proteinases have been tested and the best enantioselectivity was obtained with proteinase from Aspergillus oryzae which gave an E-value of 9 with 2,2-dimethyl-1,3-dioxolane-4-methanol butanoate. Variations in the acyl part revealed that butanoyl was optimal. All hydrolysis products have been synthesised in homochiral forms from homochiral starting materials.
ANGELI, P.;GIANNELLA, M.;PIGINI, M.;GUALTIERI, F.;TEODORI, E.;VALSECCHI, +, EUR. J. MED. CHEM., 1985, 20, N 6, 517-523