
(S)-(+)-2-Chlorophenylglycine methyl ester (L)-(+)-tartrate is a chiral amino acid ester salt formed with (L)-(+)-tartaric acid. It is a white to off-white crystalline powder with excellent optical purity, and serves as a key chiral building block for the asymmetric synthesis of pharmaceutical actives, especially in the preparation of the chiral side chain of clopidogrel intermediates. in water. In acidic solutions, it is colorless, while in basic solutions, it turns pink to purple.