Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Starting from the di-O-benzylidene-D-mannitol derivative 11, certain types of optically active glycerol derivatives can be prepared with a minimum of protecting group chemistry. This is exemplified by an efficient synthesis of 2-O-alkyl glyceric acid derivatives 22 and 23.