Abstract Asymmetric syntheses of all diastereoisomers of β-methoxytyrosine, an unusual amino acid contained in callipeltin A, were accomplished starting from a cinnamyl ester derivative. The stereochemistry of β-methoxytyrosine in callipeltin E was estimated to be 2R, 3R by 1 H and 13 C NMR analyses of four diastereoisomeric tripeptides, each containing a β- methoxytyrosine isomer. These results obtained from the synthetic peptide derivatives ...
