Diphenylalanine is the unnatural amino acid with the formula . The compound is structurally related to the amino acids alanine and phenylalanine. It has been used for the synthesis of pseudopeptide analogues that are capable of inhibiting certain enzymes.
Individual enantiomers of this compound can be synthesized via electrophilic amination of a chiral oxazolidinone derivative of 3,3-diphenylpropanoic acid.
The term diphenylalanine in the context of scientific literature is typically used for the dipeptide of phenylalanine ().
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