Alkylating analogs of bradykinin.

Three analogs of bradykinin have been synthesized which bear a bromoacetyl function on the alpha-amino group or on an anilinic amino group at position 5 or 8. It was hoped that one or more of these analogs might act as an irreversible bradykinin antagonist or as a long-acting converting enzyme inhibitor. Although none of the analogs exhibited the desired pharmacological properties, the methods described for the synthesis and characterization of peptides bearing anilinic bromoacetyl groups are of potential utility in the development of antagonists of other tyrosine--or phenylalanine--containing peptides.