| abstract |
Process for the preparation of peptide-substituted heterocyclic compounds having the formula below, their pharmaceutically acceptable salts and intermediates, and use as immunostimulating and infectious agents. Wherein R is a 5- or 6-membered N-containing heterocyclic moiety which may contain an additional heteroatom selected from N, S or O, R1 is hydrogen or (C1-4) alkyl, x is 0 or one is integer from 1 to 5 and y is 0 or 1, provided that when y is 0, said N-containing heterocyclic moiety is linked through its N atom to the group. formula |