Phenylglycine is non-proteinogenic α-amino acid, and its partial structure is found in some biologically active compounds. C-Terminal modification of N-acyl-protected phenylglycine sometimes causes racemization due to the fact that the phenyl ring is directly connected to the α-position of the α-amino acid skeleton. In this report, synthesis and the properties of N-trifluoroacetylphenylglycine hydroxysuccinimide ester are described.