E104554, Starting material for the synthesis of chiral building blocks, e.g. (S)-1,2-propanediol and (S)-propylene oxide. O-Protection and reduction to the aldehyde.(-)-Ethyl L-lactate can be used in the preparation of:· (R)-(+)-2-methyloxirane.· (S)-2-((tert-Butyldimethylsilyl)oxy)propanal, a key intermediate for the synthesis of maltepolides., g