FREMGANGSMAADE TIL FREMSTILLING AF PENTAPEPTIDER MED VIRKNING PAA IMMUNSYSTEMET SAMT MELLEMPRODUKTER VED FREMGANGSMAADEN

摘要

The invention relates to a process for the preparation of peptides of the general formula Arg-Lys-S-Val-Y in which S denotes glutamic acid or alpha -aminoadipic acid and Y denotes tyrosine or tryptophan or esters or amides thereof, which comprises subjecting tetrapeptides of the formula Z-Arg(Z'2)-Lys(Z')-S-(Bzl)-Val-OH in which Z' represents a protective group of the benzyl type, to a condensation reaction with corresponding tyrosine esters or amides or tryptophan esters or amides and removing the protective groups by hydrogenation. The invention furthermore relates to tetrapeptides as intermediate products of this process.