Asymmetric Chemical Synthesis of (R)- and (S)-Citramalate in High Enantiomeric Purity

Sa？etak Both enantiomers of dimethyl 2-acety1citramalate have been asymmetrically synthesized in over 96% enantiomeric excess and good overall chemical yield (500/0)from 2-keto-1,3-oxathianes 1a, and 1b