A new and convenient method for the preparation of pure enantiomers of α-amino acids is described. Industrial papain, catalyzes the synthesis of L-Z-amino acid ethyl esters in ethanolic medium, with good yields. These esters are obtained from DL-Z-amino acids with 100% optical purity. Unreactive D-Z-amino acids are readily isolated from reaction medium. Physical constants of natural and xenobiotic L-Z-amino acid esters and D-Z-amino acids are described.
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Moriniere et al. (1988) studied this question.
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