N-Protected amino enol esters are easily transformed at room temperature into amino amides, and in the presence of potassium cyanide as catalyst, into tertiary amides and dipeptides.
N-Protected amino enol esters are easily transformed at room temperature into amino amides, and in the presence of potassium cyanide as catalyst, into tertiary amides and dipeptides.
According to the present invention it is shown that under appropriate conditions the catalyzed addition of alkynes is a convenient method for the racemisation-free preparation of C-terminal oligopeptide enol esters, which can be used as substrates for the enzymatic peptide coupling using a serine endopeptidase.