We describe herein a method providing access to both enantiomers of 3-acety
lthio-2-benzylpropionic acid via enzymatic desymmetrization of 2-benzyl-1,3
-propanediol. These compounds are respectively the starting materials for t
he synthesis of ecadotril, and dexecadotril, which are powerful inhibitors
of NEP (EC 3.4.24.11) and have been developed as therapeutic agents.