摘要:
[image omitted] A simple and mild one-pot synthesis of potentially bioactive -N-protected dipeptidyl ureas is reported. The procedure involves the reaction between the carbamoyl azide of an -N-protected amino acid and an -amino acid methyl ester. The reaction is fast (3h at 45 degrees C), regardless of the nature of both the reagents, and racemization free. The reported protocol represents a valid alternative to existing methods.