“Process for the preparation of 3,6-di-O-acethyl-D-glycals via transacylation and regioselective enzymic hydrolysis”

Regioselective hydrolysis in 6-O position, catalyzed by immobilied lipases . Migration of the acethyl group from 6 to 4 position, givs 3,6-di-O-acethyl-D-glycals in high yields.