USE OF DIKETOPIPERAZINES FOR DETERMINING ABSOLUTE CONFIGURATIONS OF alpha-SUBSTITUTED SERINES BY H-1-NMR SPECTROSCOPY

[摘要]：A chiral alpha-substituted serine of interest was transformed into both of the corresponding diastereomers of diketopiperazines utilizing L- and D-phenylalanine methyl ester hydrochloride. The absolute configuration of the original chiral alpha-substituted serine was determined by H-1-NMR analyses of the resulting diastereomers.

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